More Related Content More from Oren Nakdimon (7) The Features That (maybe) You Didn't Know About1. The Features That
maybe
You Didn’t Know About
Oren Nakdimon
www.db-oriented.com
oren@db-oriented.com
+972-54-4393763
@DBoriented
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©OrenNakdimon
WHO AM I?
A CHRONOLOGY BY “ORACLE YEARS”
Where: IAF
When: Oracle 6/7 [1991-1997]
What: Developer
Where: Golden Screens
When: Oracle 8 [1997-1998]
What: Server Group Manager
Where: TELEknowledge
When: Oracle 8i/9i [1998-2003]
What: DBA Group Manager
Where: Olista
When: Oracle 10g/11g [2004-2011]
What: VP R&D + Israel Site Manager
Where:
When: Oracle 11g/12c [2011-]
What: Freelance Consultant
Where:
When: 2012-
What: Database
Architect / Developer / DBA
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HTTP://DB-ORIENTED.COM
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Aggregate
Functions
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select department_id,
MIN(salary)
from employees
group by department_id;
DEPARTMENT_ID EMPLOYEE_ID FIRST_NAME LAST_NAME SALARY
30 117Sigal Tobias 2800.00
30 119Karen Colmenares 2500.00
30 118Guy Himuro 2600.00
90 102Lex De Haan 17000.00
90 101Neena Kochhar 17000.00
30 115Alexander Khoo 3100.00
60 104Bruce Ernst 6000.00
30 116Shelli Baida 2900.00
60 106Valli Pataballa 4800.00
30 114Den Raphaely 11000.00
90 100Steven King 24000.00
60 103Alexander Hunold 9000.00
60 105David Austin 4800.00
60 107Diana Lorentz 4200.00
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select department_id,
MIN(salary)
from employees
group by department_id;
DEPARTMENT_ID EMPLOYEE_ID FIRST_NAME LAST_NAME SALARY
30 119Karen Colmenares 2500.00
30 118Guy Himuro 2600.00
30 117Sigal Tobias 2800.00
30 116Shelli Baida 2900.00
30 115Alexander Khoo 3100.00
30 114Den Raphaely 11000.00
60 107Diana Lorentz 4200.00
60 106Valli Pataballa 4800.00
60 105David Austin 4800.00
60 104Bruce Ernst 6000.00
60 103Alexander Hunold 9000.00
90 101Neena Kochhar 17000.00
90 102Lex De Haan 17000.00
90 100Steven King 24000.00
DEPARTMENT_ID MIN(SALARY)
30 2500.00
60 4200.00
90 17000.00
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DEPARTMENT_ID EMPLOYEE_ID FIRST_NAME LAST_NAME SALARY
30 119Karen Colmenares 2500.00
30 118Guy Himuro 2600.00
30 117Sigal Tobias 2800.00
30 116Shelli Baida 2900.00
30 115Alexander Khoo 3100.00
30 114Den Raphaely 11000.00
60 107Diana Lorentz 4200.00
60 106Valli Pataballa 4800.00
60 105David Austin 4800.00
60 104Bruce Ernst 6000.00
60 103Alexander Hunold 9000.00
90 101Neena Kochhar 17000.00
90 102Lex De Haan 17000.00
90 100Steven King 24000.00
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Aggregate
Functions
FIRST
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THE FIRST FUNCTION
DEPARTMENT_ID EMPLOYEE_ID FIRST_NAME LAST_NAME SALARY
30 119Karen Colmenares 2500.00
30 118Guy Himuro 2600.00
30 117Sigal Tobias 2800.00
30 116Shelli Baida 2900.00
30 115Alexander Khoo 3100.00
30 114Den Raphaely 11000.00
60 107Diana Lorentz 4200.00
60 106Valli Pataballa 4800.00
60 105David Austin 4800.00
60 104Bruce Ernst 6000.00
60 103Alexander Hunold 9000.00
90 101Neena Kochhar 17000.00
90 102Lex De Haan 17000.00
90 100Steven King 24000.00
select
department_id,
min(first_name) keep(dense_rank FIRST order by salary)
from employees
group by department_id;
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THE FIRST FUNCTION
DEPARTMENT_ID EMPLOYEE_ID FIRST_NAME LAST_NAME SALARY
30 119Karen Colmenares 2500.00
30 118Guy Himuro 2600.00
30 117Sigal Tobias 2800.00
30 116Shelli Baida 2900.00
30 115Alexander Khoo 3100.00
30 114Den Raphaely 11000.00
60 107Diana Lorentz 4200.00
60 106Valli Pataballa 4800.00
60 105David Austin 4800.00
60 104Bruce Ernst 6000.00
60 103Alexander Hunold 9000.00
90 101Neena Kochhar 17000.00
90 102Lex De Haan 17000.00
90 100Steven King 24000.00
select
department_id,
min(first_name) keep(dense_rank FIRST order by salary)
from employees
group by department_id;
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THE FIRST FUNCTION
DEPARTMENT_ID EMPLOYEE_ID FIRST_NAME LAST_NAME SALARY
30 119Karen Colmenares 2500.00
30 118Guy Himuro 2600.00
30 117Sigal Tobias 2800.00
30 116Shelli Baida 2900.00
30 115Alexander Khoo 3100.00
30 114Den Raphaely 11000.00
60 107Diana Lorentz 4200.00
60 106Valli Pataballa 4800.00
60 105David Austin 4800.00
60 104Bruce Ernst 6000.00
60 103Alexander Hunold 9000.00
90 101Neena Kochhar 17000.00
90 102Lex De Haan 17000.00
90 100Steven King 24000.00
select
department_id,
min(first_name) keep(dense_rank FIRST order by salary)
from employees
group by department_id;
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©OrenNakdimon
THE FIRST FUNCTION
DEPARTMENT_ID EMPLOYEE_ID FIRST_NAME LAST_NAME SALARY
30 119Karen Colmenares 2500.00
30 118Guy Himuro 2600.00
30 117Sigal Tobias 2800.00
30 116Shelli Baida 2900.00
30 115Alexander Khoo 3100.00
30 114Den Raphaely 11000.00
60 107Diana Lorentz 4200.00
60 106Valli Pataballa 4800.00
60 105David Austin 4800.00
60 104Bruce Ernst 6000.00
60 103Alexander Hunold 9000.00
90 101Neena Kochhar 17000.00
90 102Lex De Haan 17000.00
90 100Steven King 24000.00
select
department_id,
min(first_name) keep(dense_rank FIRST order by salary)
from employees
group by department_id;
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THE FIRST FUNCTION
DEPARTMENT_ID EMPLOYEE_ID FIRST_NAME LAST_NAME SALARY
30 119Karen Colmenares 2500.00
30 118Guy Himuro 2600.00
30 117Sigal Tobias 2800.00
30 116Shelli Baida 2900.00
30 115Alexander Khoo 3100.00
30 114Den Raphaely 11000.00
60 107Diana Lorentz 4200.00
60 106Valli Pataballa 4800.00
60 105David Austin 4800.00
60 104Bruce Ernst 6000.00
60 103Alexander Hunold 9000.00
90 101Neena Kochhar 17000.00
90 102Lex De Haan 17000.00
90 100Steven King 24000.00
select
department_id,
min(first_name) keep(dense_rank FIRST order by salary)
from employees
group by department_id;
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©OrenNakdimon
THE FIRST FUNCTION
DEPARTMENT_ID EMPLOYEE_ID FIRST_NAME LAST_NAME SALARY
30 119Karen Colmenares 2500.00
30 118Guy Himuro 2600.00
30 117Sigal Tobias 2800.00
30 116Shelli Baida 2900.00
30 115Alexander Khoo 3100.00
30 114Den Raphaely 11000.00
60 107Diana Lorentz 4200.00
60 106Valli Pataballa 4800.00
60 105David Austin 4800.00
60 104Bruce Ernst 6000.00
60 103Alexander Hunold 9000.00
90 101Neena Kochhar 17000.00
90 102Lex De Haan 17000.00
90 100Steven King 24000.00
select
department_id,
min(first_name) keep(dense_rank FIRST order by salary)
from employees
group by department_id;
DEPARTMENT_ID MIN(FIRST_NAME)…
30Karen
60Diana
90Lex
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©OrenNakdimon
Aggregate
Functions
LAST
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THE LAST FUNCTION
DEPARTMENT_ID EMPLOYEE_ID FIRST_NAME LAST_NAME SALARY
30 119Karen Colmenares 2500.00
30 118Guy Himuro 2600.00
30 117Sigal Tobias 2800.00
30 116Shelli Baida 2900.00
30 115Alexander Khoo 3100.00
30 114Den Raphaely 11000.00
60 107Diana Lorentz 4200.00
60 106Valli Pataballa 4800.00
60 105David Austin 4800.00
60 104Bruce Ernst 6000.00
60 103Alexander Hunold 9000.00
90 101Neena Kochhar 17000.00
90 102Lex De Haan 17000.00
90 100Steven King 24000.00
select
department_id,
min(first_name) keep(dense_rank LAST order by salary)
from employees
group by department_id;
DEPARTMENT_ID MIN(FIRST_NAME)…
30Den
60Alexander
90Steven
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WHAT IS THE MOST COMMON JOB IN EACH DEPARTMENT?
select department_id,
min(job_id) keep(dense_rank last order by cnt)
from (select department_id,
job_id,
count(*) cnt
from employees
group by department_id,
job_id)
group by department_id;
DEPARTMENT_ID JOB_ID CNT
------------- ---------------------------- ----------
90 AD_VP 2
30 PU_CLERK 5
60 IT_PROG 5
90 AD_PRES 1
30 PU_MAN 1
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WHAT IS THE MOST COMMON JOB IN EACH DEPARTMENT?
select department_id,
min(job_id) keep(dense_rank last order by cnt)
from (select department_id,
job_id,
count(*) cnt
from employees
group by department_id,
job_id)
group by department_id;
DEPARTMENT_ID MIN(JOB_ID)KEEP(DENSE_RANKLAST
------------- ------------------------------
30 PU_CLERK
60 IT_PROG
90 AD_VP
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Aggregate
Functions
STATS_MODE
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WHAT IS THE MOST COMMON JOB IN EACH DEPARTMENT?
select department_id,
stats_mode(job_id)
from employees
group by department_id;
DEPARTMENT_ID MIN(JOB_ID)KEEP(DENSE_RANKLAST
------------- ------------------------------
30 PU_CLERK
60 IT_PROG
90 AD_VP
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Collections
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DISTINCT COUNT OF A VALUE ACROSS COLUMNS IN A TABLE
I have this table:
select * from country_test;
c1 c2 c3 c4
————— ————— ————— ——————
india us china uk
india india china uk
india china china uk
us us us uk
I need the distinct count of countries across the c1,c2,c3,c4 columns
of the table, so the output has to be
c1 c2 c3 c4 cnt
————— ————— ————— ——— ————
india us china uk 4
india india china uk 3
india china china uk 3
us us us uk 2
http://asktom.oracle.com/pls/apex/f?p=100:11:0::::P11_QUESTION_ID:8749607800346631637
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DISTINCT COUNT OF A VALUE ACROSS COLUMNS IN A TABLE
ops$tkyte%ORA11GR2> with data(r)
2 as
3 (select 1 r from dual
4 union all
5 select r+1 from data where r < 4
6 )
7 select c1, c2, c3, c4, count(distinct c) cnt
8 from (
9 select rowid rid,
10 c1, c2, c3, c4,
11 decode(r,1,c1,2,c2,3,c3,4,c4) c
12 from data, country_test
13 )
14 group by rid, c1, c2, c3, c4
15 /
C1 C2 C3 C4 CNT
---------- ---------- ---------- ---------- ----------
india us china uk 4
us us us uk 2
india india china uk 3
india china china uk 3
http://asktom.oracle.com/pls/apex/f?p=100:11:0::::P11_QUESTION_ID:8749607800346631637
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DISTINCT COUNT OF A VALUE ACROSS COLUMNS IN A TABLE
with data as (select rownum r,c1,c2,c3,c4
from ctest)
select listagg(rpad(val,21),'') within
group (order by column_list) orig
,count(distinct val) countries
from
(
select * from data
unpivot (val for column_list in
(c1,c2,c3,c4))
)
group by r
order by r;
select * from country_test,
lateral(
select count(distinct c) cnt from (
select c1 c from dual union all
select c2 from dual union all
select c3 from dual union all
select c4 from dual
)
);
select country_test.*, cnt_tab.cnt
from country_test,
(
select count(1) cnt, rid
from (
select rowid rid, c1 c from country_test
union select rowid, c2 from country_test
union select rowid, c3 from country_test
union select rowid, c4 from country_test
)
group by rid
) cnt_tab
where country_test.rowid = cnt_tab.rid
select * from country_test,
lateral(
select count(distinct val) cnt from (
select c1,c2,c3,c4 from dual
) unpivot(val for col in (c1,c2,c3,c4))
);
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DISTINCT COUNT OF A VALUE ACROSS COLUMNS IN A TABLE
create type string_ntt as
table of varchar2(4000)
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Collections
Default
Constructor
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DISTINCT COUNT OF A VALUE ACROSS COLUMNS IN A TABLE
create type string_ntt as
table of varchar2(4000)
select
string_ntt('John','Paul','George','Ringo') beatles
from dual;
BEATLES
----------------------------------------------
STRING_NTT('John', 'Paul', 'George', 'Ringo')
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DISTINCT COUNT OF A VALUE ACROSS COLUMNS IN A TABLE
create type string_ntt as
table of varchar2(4000)
select
c.*,
cardinality(set(string_ntt(c1,c2,c3,c4)))
from country_test c;
C1 C2 C3 C4 STRING_NTT(C1,C2,C3,C4)
----- ----- ----- ----- --------------------------------------------------
india us china uk STRING_NTT('india', 'us', 'china', 'uk')
india india china uk STRING_NTT('india', 'india', 'china', 'uk')
india china china uk STRING_NTT('india', 'china', 'china', 'uk')
us us us uk STRING_NTT('us', 'us', 'us', 'uk')
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Collections
SET
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©OrenNakdimon
DISTINCT COUNT OF A VALUE ACROSS COLUMNS IN A TABLE
select
c.*,
cardinality(set(string_ntt(c1,c2,c3,c4)))
from country_test c;
C1 C2 C3 C4 SET(STRING_NTT(C1,C2,C3,C4))
----- ----- ----- ----- ----------------------------------------
india us china uk STRING_NTT('india', 'us', 'china', 'uk')
india india china uk STRING_NTT('india', 'china', 'uk')
india china china uk STRING_NTT('india', 'china', 'uk')
us us us uk STRING_NTT('us', 'uk')
C1 C2 C3 C4 STRING_NTT(C1,C2,C3,C4)
----- ----- ----- ----- --------------------------------------------------
india us china uk STRING_NTT('india', 'us', 'china', 'uk')
india india china uk STRING_NTT('india', 'india', 'china', 'uk')
india china china uk STRING_NTT('india', 'china', 'china', 'uk')
us us us uk STRING_NTT('us', 'us', 'us', 'uk')
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Collections
CARDINALITY
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DISTINCT COUNT OF A VALUE ACROSS COLUMNS IN A TABLE
select
c.*,
cardinality(set(string_ntt(c1,c2,c3,c4)))
from country_test c;
C1 C2 C3 C4 CARDINALITY(SET(STRING_NTT(C1,C2,C3,C4)))
----- ----- ----- ----- -----------------------------------------
india us china uk 4
india india china uk 3
india china china uk 3
us us us uk 2
C1 C2 C3 C4 SET(STRING_NTT(C1,C2,C3,C4))
----- ----- ----- ----- ----------------------------------------
india us china uk STRING_NTT('india', 'us', 'china', 'uk')
india india china uk STRING_NTT('india', 'china', 'uk')
india china china uk STRING_NTT('india', 'china', 'uk')
us us us uk STRING_NTT('us', 'uk')
C1 C2 C3 C4 STRING_NTT(C1,C2,C3,C4)
----- ----- ----- ----- --------------------------------------------------
india us china uk STRING_NTT('india', 'us', 'china', 'uk')
india india china uk STRING_NTT('india', 'india', 'china', 'uk')
india china china uk STRING_NTT('india', 'china', 'china', 'uk')
us us us uk STRING_NTT('us', 'us', 'us', 'uk')
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Collections
Unnesting
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COLLECTION UNNESTING
select *
from
table(string_ntt('John','Paul','George','Ringo'));
COLUMN_VALUE
---------------------
John
Paul
George
Ringo
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KAKURO
Digits 1-9
Sum = associated
clue
No duplications
6 = 1+2+3
12 = 1+2+3+6
12 = 1+2+4+5
http://db-oriented.com/2016/06/10/kakuro-helper-using-sql-query-with-the-powermultiset-function/
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> select *
from table(powermultiset(integer_ntt(1,2,3,4,5,6,7,8,9)));
COLUMN_VALUE
-------------------------
create type integer_ntt as table of integer
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Collections
POWERMULTISET
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> select *
from table(powermultiset(integer_ntt(1,2,3,4,5,6,7,8,9)));
COLUMN_VALUE
-------------------------
INTEGER_NTT(1)
INTEGER_NTT(2)
INTEGER_NTT(1, 2)
INTEGER_NTT(3)
INTEGER_NTT(1, 3)
INTEGER_NTT(2, 3)
INTEGER_NTT(1, 2, 3)
INTEGER_NTT(4)
INTEGER_NTT(1, 4)
INTEGER_NTT(2, 4)
INTEGER_NTT(1, 2, 4)
INTEGER_NTT(3, 4)
INTEGER_NTT(1, 3, 4)
INTEGER_NTT(2, 3, 4)
INTEGER_NTT(1, 2, 3, 4)
INTEGER_NTT(5)
...
INTEGER_NTT(1, 3, 4, 5, 6, 7, 8, 9)
INTEGER_NTT(2, 3, 4, 5, 6, 7, 8, 9)
INTEGER_NTT(1, 2, 3, 4, 5, 6, 7, 8, 9)
511 rows selected.
create type integer_ntt as table of integer
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> select *
from table(powermultiset(integer_ntt(1,2,3,4,5,6,7,8,9)));
COLUMN_VALUE
-------------------------
INTEGER_NTT(1)
INTEGER_NTT(2)
INTEGER_NTT(1, 2)
INTEGER_NTT(3)
INTEGER_NTT(1, 3)
INTEGER_NTT(2, 3)
INTEGER_NTT(1, 2, 3)
INTEGER_NTT(4)
INTEGER_NTT(1, 4)
INTEGER_NTT(2, 4)
INTEGER_NTT(1, 2, 4)
INTEGER_NTT(3, 4)
INTEGER_NTT(1, 3, 4)
INTEGER_NTT(2, 3, 4)
INTEGER_NTT(1, 2, 3, 4)
INTEGER_NTT(5)
...
INTEGER_NTT(1, 3, 4, 5, 6, 7, 8, 9)
INTEGER_NTT(2, 3, 4, 5, 6, 7, 8, 9)
INTEGER_NTT(1, 2, 3, 4, 5, 6, 7, 8, 9)
511 rows selected.
create type integer_ntt as table of integer
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©OrenNakdimon
break on x on num_of_elements skip 1
select sum(b.column_value) x,
a.num_of_elements,
listagg(b.column_value,'+') within group(order by b.column_value) expr
from (select rownum id ,
cardinality(column_value) num_of_elements,
column_value combination
from table(powermultiset(integer_ntt(1,2,3,4,5,6,7,8,9)))) a,
table(a.combination) b
where a.num_of_elements > 1
group by a.id,a.num_of_elements
order by x,num_of_elements,expr;
ID NUM_OF_ELEMENTS COMBINATION
---------- --------------- --------------------------------------------------------------
1 1 INTEGER_NTT(1)
2 1 INTEGER_NTT(2)
3 2 INTEGER_NTT(1, 2)
4 1 INTEGER_NTT(3)
5 2 INTEGER_NTT(1, 3)
6 2 INTEGER_NTT(2, 3)
7 3 INTEGER_NTT(1, 2, 3)
...
508 7 INTEGER_NTT(3, 4, 5, 6, 7, 8, 9)
509 8 INTEGER_NTT(1, 3, 4, 5, 6, 7, 8, 9)
510 8 INTEGER_NTT(2, 3, 4, 5, 6, 7, 8, 9)
511 9 INTEGER_NTT(1, 2, 3, 4, 5, 6, 7, 8, 9)
511 rows selected.
http://db-oriented.com/2016/06/10/kakuro-helper-using-sql-query-with-the-powermultiset-function/
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©OrenNakdimon
break on x on num_of_elements skip 1
select sum(b.column_value) x,
a.num_of_elements,
select a.*,b.column_value
from (select rownum id ,
cardinality(column_value) num_of_elements,
column_value combination
from table(powermultiset(integer_ntt(1,2,3,4,5,6,7,8,9)))) a,
table(a.combination) b
where a.num_of_elements > 1
group by a.id,a.num_of_elements
order by x,num_of_elements,expr;
ID NUM_OF_ELEMENTS COMBINATION COLUMN_VALUE
---------- --------------- -------------------- ------------
1 1 INTEGER_NTT(1) 1
2 1 INTEGER_NTT(2) 2
3 2 INTEGER_NTT(1, 2) 1
3 2 INTEGER_NTT(1, 2) 2
4 1 INTEGER_NTT(3) 3
5 2 INTEGER_NTT(1, 3) 1
5 2 INTEGER_NTT(1, 3) 3
6 2 INTEGER_NTT(2, 3) 2
6 2 INTEGER_NTT(2, 3) 3
7 3 INTEGER_NTT(1, 2, 3) 1
7 3 INTEGER_NTT(1, 2, 3) 2
7 3 INTEGER_NTT(1, 2, 3) 3
...
2304 rows selected.
http://db-oriented.com/2016/06/10/kakuro-helper-using-sql-query-with-the-powermultiset-function/
1+2+3=6
1+2=3
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break on x on num_of_elements skip 1
select sum(b.column_value) x,
a.num_of_elements,
listagg(b.column_value,'+') within group(order by b.column_value) expr
from (select rownum id ,
cardinality(column_value) num_of_elements,
column_value combination
from table(powermultiset(integer_ntt(1,2,3,4,5,6,7,8,9)))) a,
table(a.combination) b
where a.num_of_elements > 1
group by a.id,a.num_of_elements
order by x,num_of_elements,expr;
http://db-oriented.com/2016/06/10/kakuro-helper-using-sql-query-with-the-powermultiset-function/
X NUM_OF_ELEMENTS EXPR
---------- --------------- ----------
3 2 1+2
4 2 1+3
5 2 1+4
2+3
6 2 1+5
2+4
3 1+2+3
7 2 1+6
2+5
3+4
3 1+2+4
X NUM_OF_ELEMENTS EXPR
---------- --------------- --------------------
41 7 2+4+5+6+7+8+9
8 1+2+3+5+6+7+8+9
42 7 3+4+5+6+7+8+9
8 1+2+4+5+6+7+8+9
43 8 1+3+4+5+6+7+8+9
44 8 2+3+4+5+6+7+8+9
45 9 1+2+3+4+5+6+7+8+9
502 rows selected.
46. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
break on x on num_of_elements skip 1
select sum(b.column_value) x,
a.num_of_elements,
listagg(b.column_value,'+') within group(order by b.column_value) expr
from (select rownum id ,
cardinality(column_value) num_of_elements,
column_value combination
from table(powermultiset(integer_ntt(1,2,3,4,5,6,7,8,9)))) a,
table(a.combination) b
where a.num_of_elements > 1
group by a.id,a.num_of_elements
order by x,num_of_elements,expr;
http://db-oriented.com/2016/06/10/kakuro-helper-using-sql-query-with-the-powermultiset-function/
X NUM_OF_ELEMENTS EXPR
---------- --------------- ----------
3 2 1+2
4 2 1+3
5 2 1+4
2+3
6 2 1+5
2+4
3 1+2+3
7 2 1+6
2+5
3+4
3 1+2+4
X NUM_OF_ELEMENTS EXPR
---------- --------------- --------------------
41 7 2+4+5+6+7+8+9
8 1+2+3+5+6+7+8+9
42 7 3+4+5+6+7+8+9
8 1+2+4+5+6+7+8+9
43 8 1+3+4+5+6+7+8+9
44 8 2+3+4+5+6+7+8+9
45 9 1+2+3+4+5+6+7+8+9
502 rows selected.
47. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
break on x on num_of_elements skip 1
select sum(b.column_value) x,
a.num_of_elements,
listagg(b.column_value,'+') within group(order by b.column_value) expr
from (select rownum id ,
cardinality(column_value) num_of_elements,
column_value combination
from table(powermultiset(integer_ntt(1,2,3,4,5,6,7,8,9)))) a,
table(a.combination) b
where a.num_of_elements > 1
group by a.id,a.num_of_elements
order by x,num_of_elements,expr;
http://db-oriented.com/2016/06/10/kakuro-helper-using-sql-query-with-the-powermultiset-function/
X NUM_OF_ELEMENTS EXPR
---------- --------------- ----------
3 2 1+2
4 2 1+3
5 2 1+4
2+3
6 2 1+5
2+4
3 1+2+3
7 2 1+6
2+5
3+4
3 1+2+4
X NUM_OF_ELEMENTS EXPR
---------- --------------- --------------------
41 7 2+4+5+6+7+8+9
8 1+2+3+5+6+7+8+9
42 7 3+4+5+6+7+8+9
8 1+2+4+5+6+7+8+9
43 8 1+3+4+5+6+7+8+9
44 8 2+3+4+5+6+7+8+9
45 9 1+2+3+4+5+6+7+8+9
502 rows selected.
48. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
break on x on num_of_elements skip 1
select sum(b.column_value) x,
a.num_of_elements,
listagg(b.column_value,'+') within group(order by b.column_value) expr
from (select rownum id ,
cardinality(column_value) num_of_elements,
column_value combination
from table(powermultiset(integer_ntt(1,2,3,4,5,6,7,8,9)))) a,
table(a.combination) b
where a.num_of_elements > 1
group by a.id,a.num_of_elements
order by x,num_of_elements,expr;
http://db-oriented.com/2016/06/10/kakuro-helper-using-sql-query-with-the-powermultiset-function/
X NUM_OF_ELEMENTS EXPR
---------- --------------- ----------
3 2 1+2
4 2 1+3
5 2 1+4
2+3
6 2 1+5
2+4
3 1+2+3
7 2 1+6
2+5
3+4
3 1+2+4
X NUM_OF_ELEMENTS EXPR
---------- --------------- --------------------
41 7 2+4+5+6+7+8+9
8 1+2+3+5+6+7+8+9
42 7 3+4+5+6+7+8+9
8 1+2+4+5+6+7+8+9
43 8 1+3+4+5+6+7+8+9
44 8 2+3+4+5+6+7+8+9
45 9 1+2+3+4+5+6+7+8+9
502 rows selected.
49. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
break on x on num_of_elements skip 1
select sum(b.column_value) x,
a.num_of_elements,
listagg(b.column_value,'+') within group(order by b.column_value) expr
from (select rownum id ,
cardinality(column_value) num_of_elements,
column_value combination
from table(powermultiset(integer_ntt(1,2,3,4,5,6,7,8,9)))) a,
table(a.combination) b
where a.num_of_elements > 1
group by a.id,a.num_of_elements
order by x,num_of_elements,expr;
X NUM_OF_ELEMENTS EXPR
---------- --------------- ----------
3 2 1+2
4 2 1+3
5 2 1+4
2+3
6 2 1+5
2+4
3 1+2+3
7 2 1+6
2+5
3+4
3 1+2+4
X NUM_OF_ELEMENTS EXPR
---------- --------------- --------------------
41 7 2+4+5+6+7+8+9
8 1+2+3+5+6+7+8+9
42 7 3+4+5+6+7+8+9
8 1+2+4+5+6+7+8+9
43 8 1+3+4+5+6+7+8+9
44 8 2+3+4+5+6+7+8+9
45 9 1+2+3+4+5+6+7+8+9
502 rows selected.
http://db-oriented.com/2016/06/10/kakuro-helper-using-sql-query-with-the-powermultiset-function/
51. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
break on x skip 1
select * from (
select sum(b.column_value) x,
a.num_of_elements,
listagg(b.column_value,'+') within group(order by b.column_value) expr
from (select rownum id ,
cardinality(column_value) num_of_elements,
column_value combination
from table(powermultiset(integer_ntt(1,2,3,4,5,6,7,8,9)))) a,
table(a.combination) b
where a.num_of_elements > 1
group by a.id,a.num_of_elements
)
pivot (listagg(expr, chr(10)) within group (order by expr)
for num_of_elements in(2,3,4,5,6,7,8,9));
http://db-oriented.com/2016/06/10/kakuro-helper-using-sql-query-with-the-powermultiset-function/
X 2 3 4 5 6 7 8 9
-- ---- ------ -------- ---------- ------------ -------------- ---------------- ---------
3 1+2
4 1+3
5 1+4
2+3
52. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
pivot (listagg(expr, chr(10)) within group (order by expr)
for num_of_elements in(2,3,4,5,6,7,8,9));
http://db-oriented.com/2016/06/10/kakuro-helper-using-sql-query-with-the-powermultiset-function/
X 2 3 4 5 6 7 8 9
-- ---- ------ -------- ---------- ------------ -------------- ---------------- ---------
3 1+2
4 1+3
5 1+4
2+3
6 1+5 1+2+3
2+4
21 4+8+9 1+3+8+9 1+2+3+6+9 1+2+3+4+5+6
5+7+9 1+4+7+9 1+2+3+7+8
6+7+8 1+5+6+9 1+2+4+5+9
1+5+7+8 1+2+4+6+8
2+3+7+9 1+2+5+6+7
2+4+6+9 1+3+4+5+8
2+4+7+8 1+3+4+6+7
2+5+6+8 2+3+4+5+7
3+4+5+9
3+4+6+8
3+5+6+7
44 2+3+4+5+6+7+8+9
45 1+2+3+4+…
53. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
Recursive
Subquery
Factoring
54. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
RECURSIVE SUBQUERY FACTORING
with fib(x,f) as (
select 1 as x, 1 as f from dual
union all
select f, x+f from fib where x+f <= &n
)
select f
from fib;
anchor member
55. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
RECURSIVE SUBQUERY FACTORING
with fib(x,f) as (
select 1 as x, 1 as f from dual
union all
select f, x+f from fib where x+f <= &n
)
select f
from fib;
anchor member
recursive member
56. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
RECURSIVE SUBQUERY FACTORING
with fib(x,f) as (
select 1 as x, 1 as f from dual
union all
select f, x+f from fib where x+f <= &n
)
select f
from fib;
Enter value for n: 121
F
----------
1
2
3
5
8
13
21
34
55
89
10 rows selected.
anchor member
recursive member
57. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
Pattern
Matching
58. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
THE MOST BASIC SQL
Row-level visibility
Maximum one output row per input row
WHERE clause
59. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
AGGREGATE FUNCTIONS
Group-level visibility
Strict definition of “group”
Each input row belongs to exactly one group
Maximum one output row per group
GROUP BY clause
HAVING clause
60. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
Window-level visibility
Strict definition of “window”
Each input row has its own window
Window-level aggregates are added to input
rows
OVER
PARTITION BY
ORDER BY
ANALYTIC (WINDOW) FUNCTIONS
61. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
Window-level visibility
Strict definition of “window”
Each input row has its own window
Window-level aggregates are added to input
rows
OVER
PARTITION BY
ORDER BY
ANALYTIC (WINDOW) FUNCTIONS
62. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
ANALYTIC (WINDOW) FUNCTIONS
Window-level visibility
Strict definition of “window”
Each input row has its own window
Window-level aggregates are added to input
rows
OVER
PARTITION BY
ORDER BY
63. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
PATTERN MATCHING
Enhanced analysis of row sequences
Match-based output
One row per match (similar to the “group by” concept)
or
All the match’s input rows (similar to the “window” concept)
Each input row may belong to 0, 1 or more
matches
64. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
PATTERN MATCHING
Zeckendorf's theorem
Every positive integer can be represented uniquely as the sum of distinct
non-consecutive Fibonacci numbers, and this representation can be found by
using a greedy algorithm, choosing the largest possible Fibonacci number at
each stage.
6 = 5 + 1 122 = 89 + 21 + 8 + 3 + 117 = 13 + 3 + 1 34 = 34
http://marogel.wordpress.com/2015/05/22/a-greedy-algorithm-using-recursive-subquery-factoring/
65. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
PATTERN MATCHING
http://marogel.wordpress.com/2015/05/22/a-greedy-algorithm-using-recursive-subquery-factoring/
with fib(x,f) as (
select 1 as x, 1 as f from dual
union all
select f, x+f from fib where x+f <= &n
)
select f
from fib
match_recognize(
order by f desc
all rows per match
pattern ((A|{-B-})+)
define A as sum(A.f) <= &n
)
F
1
2
3
5
8
13
21
34
55
89
n = 121
66. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
PATTERN MATCHING
http://marogel.wordpress.com/2015/05/22/a-greedy-algorithm-using-recursive-subquery-factoring/
with fib(x,f) as (
select 1 as x, 1 as f from dual
union all
select f, x+f from fib where x+f <= &n
)
select f
from fib
match_recognize(
order by f desc
all rows per match
pattern ((A|{-B-})+)
define A as sum(A.f) <= &n
)
F
89
55
34
21
13
8
5
3
2
1
n = 121
67. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
PATTERN MATCHING
http://marogel.wordpress.com/2015/05/22/a-greedy-algorithm-using-recursive-subquery-factoring/
with fib(x,f) as (
select 1 as x, 1 as f from dual
union all
select f, x+f from fib where x+f <= &n
)
select f
from fib
match_recognize(
order by f desc
all rows per match
pattern ((A|{-B-})+)
define A as sum(A.f) <= &n
)
F
89
55
34
21
13
8
5
3
2
1
A
n = 121
68. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
PATTERN MATCHING
http://marogel.wordpress.com/2015/05/22/a-greedy-algorithm-using-recursive-subquery-factoring/
with fib(x,f) as (
select 1 as x, 1 as f from dual
union all
select f, x+f from fib where x+f <= &n
)
select f
from fib
match_recognize(
order by f desc
all rows per match
pattern ((A|{-B-})+)
define A as sum(A.f) <= &n
)
F
89
55
34
21
13
8
5
3
2
1
A
n = 121
69. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
PATTERN MATCHING
http://marogel.wordpress.com/2015/05/22/a-greedy-algorithm-using-recursive-subquery-factoring/
with fib(x,f) as (
select 1 as x, 1 as f from dual
union all
select f, x+f from fib where x+f <= &n
)
select f
from fib
match_recognize(
order by f desc
all rows per match
pattern ((A|{-B-})+)
define A as sum(A.f) <= &n
)
F
89
55
34
21
13
8
5
3
2
1
A
n = 121
70. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
PATTERN MATCHING
http://marogel.wordpress.com/2015/05/22/a-greedy-algorithm-using-recursive-subquery-factoring/
with fib(x,f) as (
select 1 as x, 1 as f from dual
union all
select f, x+f from fib where x+f <= &n
)
select f
from fib
match_recognize(
order by f desc
all rows per match
pattern ((A|{-B-})+)
define A as sum(A.f) <= &n
)
F
89
21
8
3
A
n = 121
71. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
Oracle
Locator
72. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
create table stops (
stop_id varchar2(20) constraint stops_pk primary key,
stop_code varchar2(20),
stop_name varchar2(100),
stop_location mdsys.sdo_geometry
);
stops.txt
insert into user_sdo_geom_metadata
(table_name,column_name,diminfo,srid)
values ('STOPS',
'STOP_LOCATION',
mdsys.sdo_dim_array(
mdsys.sdo_dim_element('LONG', -180.0, 180.0, 0.05),
mdsys.sdo_dim_element('LAT', -90.0, 90.0, 0.05)),
8307);
73. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
CREATE TABLE STOPS_EXT (stop_id varchar2(20),
stop_code varchar2(20),
stop_name varchar2(100),
stop_desc varchar2(100),
stop_lat number,
stop_lon number,
location_type number(1),
parent_location varchar2(20),
zone_id number)
ORGANIZATION EXTERNAL (
TYPE ORACLE_LOADER
DEFAULT DIRECTORY EXT_TABLES_DIR
ACCESS PARAMETERS (
records delimited by 0x'0d0a'
characterset UTF8
skip 1
logfile EXT_TABLES_DIR:'stops_%p_%a.log'
badfile EXT_TABLES_DIR:'stops_%p_%a.txt'
fields terminated by ',' optionally enclosed by '"'
missing field values are null
reject rows with all null fields
)
LOCATION ('stops.txt')
)
REJECT LIMIT UNLIMITED;
74. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
insert /*+ append */ into stops (
stop_id,
stop_code,
stop_name,
stop_location)
select stop_id,
stop_code,
stop_name,
mdsys.sdo_geometry(2001, -- 2 dimensional point
8307, -- lat/long coordinate system
mdsys.sdo_point_type(stop_lon,
stop_lat,
null),
null, -- n/a for point type
null) -- n/a for point type
from stops_ext;
commit;
75. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
External
Tables
76. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
insert /*+ append */ into stops (
stop_id,
stop_code,
stop_name,
stop_location)
select stop_id,
stop_code,
stop_name,
mdsys.sdo_geometry(2001, -- 2 dimensional point
8307, -- lat/long coordinate system
mdsys.sdo_point_type(stop_lon,
stop_lat,
null),
null, -- n/a for point type
null) -- n/a for point type
from stops_ext;
commit;
create index stops_location_idx
on stops (stop_location)
indextype is mdsys.spatial_index
parameters ('layer_gtype=POINT');
77. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
(34.863356, 32.101307)
78. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
STOP_CODE STOP_NAME LONGITUDE LATITUDE
---------- -------------------------------- --------- ---------
33080 השפלה/אימבר 34.860736 32.097785
30990 המושבות אם דרך/השפלה 34.858287 32.101256
35378 אריה קרית רכבת תחנת 34.86375 32.104148
31424 אריה קריית רכבת/וסע חנה 34.863596 32.105353
38334 המושבות אם דרך/המר זבולון דרך 34.867824 32.10336
38143 גיסין אבשלום/דיין משה 34.86262 32.096893
32172 גיסין אבשלום/בזל 34.864442 32.097726
32231 גיסין אבשלום/בזל 34.866672 32.098263
8 rows selected.
Elapsed: 00:00:00.13
------------------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
------------------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 275 | 16775 | 3 (0)| 00:00:01 |
| 1 | TABLE ACCESS BY INDEX ROWID | STOPS | 275 | 16775 | 3 (0)| 00:00:01 |
|* 2 | DOMAIN INDEX (SEL: 0.100000 %)| STOPS_LOCATION_IDX | | | 3 (0)| 00:00:01 |
------------------------------------------------------------------------------------------------------
SELECT s.stop_code,
s.stop_name,
s.stop_location.sdo_point.x longitude,
s.stop_location.sdo_point.y latitude
FROM stops s
WHERE sdo_within_distance(
s.stop_location,
sdo_geometry(2001,8307,
sdo_point_type(34.863356, 32.101307, NULL), NULL, NULL),
'distance=500 unit=meter') = 'TRUE';
All the stops
within 500
meters
79. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
GEOMETRY AGGREGATION
SELECT sdo_util.to_wktgeometry(
sdo_aggr_union(sdoaggrtype(s.stop_location,0.05)))
FROM stops s
WHERE sdo_within_distance(
s.stop_location,
sdo_geometry(2001,8307,
sdo_point_type(34.863356, 32.101307, NULL), NULL, NULL),
'distance=500 unit=meter') = 'TRUE';
80. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
GEOMETRY AGGREGATION
SELECT sdo_util.to_wktgeometry(
sdo_aggr_union(sdoaggrtype(s.stop_location,0.05)))
FROM stops s
WHERE sdo_within_distance(
s.stop_location,
sdo_geometry(2001,8307,
sdo_point_type(34.863356, 32.101307, NULL), NULL, NULL),
'distance=500 unit=meter') = 'TRUE';
81. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
GEOMETRY AGGREGATION
SELECT sdo_util.to_wktgeometry(
sdo_aggr_union(sdoaggrtype(s.stop_location,0.05)))
FROM stops s
WHERE sdo_within_distance(
s.stop_location,
sdo_geometry(2001,8307,
sdo_point_type(34.863356, 32.101307, NULL), NULL, NULL),
'distance=500 unit=meter') = 'TRUE';
MULTIPOINT ((34.866672 32.098263), (34.864442 32.097726), (34.86262
32.096893), (34.867824 32.10336), (34.863596 32.105353), (34.86375
32.104148), (34.858287 32.101256), (34.860736 32.097785))
82. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
MULTIPOINT ((34.866672 32.098263), (34.864442 32.097726), (34.86262
32.096893), (34.867824 32.10336), (34.863596 32.105353), (34.86375
32.104148), (34.858287 32.101256), (34.860736 32.097785))
83. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
SELECT s.stop_code,
s.stop_name,
s.stop_location.sdo_point.x longitude,
s.stop_location.sdo_point.y latitude
FROM stops s
WHERE sdo_nn(
s.stop_location,
sdo_geometry(2001,8307,
sdo_point_type(34.863356, 32.101307, NULL), NULL, NULL),
'sdo_num_res=3') = 'TRUE';
STOP_CODE STOP_NAME LONGITUDE LATITUDE
---------- ----------------------- --------- ----------
35378 אריה קרית רכבת תחנת 34.86375 32.104148
32172 גיסין אבשלום/בזל 34.864442 32.097726
31424 אריה קריית רכבת/וסע חנה 34.863596 32.105353
3 rows selected.
Elapsed: 00:00:00.21
------------------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
------------------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 28 | 1708 | 3 (0)| 00:00:01 |
| 1 | TABLE ACCESS BY INDEX ROWID | STOPS | 28 | 1708 | 3 (0)| 00:00:01 |
|* 2 | DOMAIN INDEX (SEL: 0.100000 %)| STOPS_LOCATION_IDX | | | 3 (0)| 00:00:01 |
------------------------------------------------------------------------------------------------------
3 nearest
stops
84. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
SELECT round(sdo_nn_distance(1)) dist_meters,
s.stop_code,
s.stop_name
FROM stops s
WHERE sdo_nn(
s.stop_location,
sdo_geometry(2001,8307,
sdo_point_type(34.863356, 32.101307, NULL), NULL, NULL),
'sdo_num_res=3',1) = 'TRUE'
order by dist_meters;
DIST_METERS STOP_CODE STOP_NAME
----------- ---------- ---------------------------------------------------------------------------
317 35378 אריה קרית רכבת תחנת
410 32172 גיסין אבשלום/בזל
449 31424 אריה קריית רכבת/וסע חנה
3 rows selected.
Elapsed: 00:00:00.06
3 nearest
stops + their
distance
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COUNTRIES AND POLYGONS
> desc countries
Name Null? Type
----------------------------- -------- --------------------
COUNTRY_ID NUMBER
COUNTRY_NAME VARCHAR2(100)
POLYGON MDSYS.SDO_GEOMETRY
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WHICH COUNTRY CONTAINS OUR POINT?
COUNTRY_NAME
----------------------------
Israel
1 row selected.
Elapsed: 00:00:00.03
---------------------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
---------------------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 2 | 48 | 2 (0)| 00:00:01 |
| 1 | TABLE ACCESS BY INDEX ROWID | COUNTRIES | 2 | 48 | 2 (0)| 00:00:01 |
|* 2 | DOMAIN INDEX (SEL: 0.100000 %)| COUNTRIES_POLYGON_IDX | | | 2 (0)| 00:00:01 |
---------------------------------------------------------------------------------------------------------
select c.country_name
from countries c
where sdo_relate(
c.polygon,
sdo_geometry(2001,8307,
sdo_point_type(34.863356, 32.101307, NULL), NULL, NULL),
'mask=contains') = 'TRUE';
87. This presentation is available in http://db-oriented.com/presentations
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Online
Operations
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ONLINE DDL OPERATIONS
Offline Operations Online Operations
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ONLINE DDL OPERATIONS
Offline Operations Online Operations
Get ORA-54 due to active
transactions
Wait for active transactions to
end
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ONLINE DDL OPERATIONS
Offline Operations Online Operations
Get ORA-54 due to active
transactions
Wait for active transactions to
end
Block new DML statements Do not block new DML
statements
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THE KEYWORD ONLINE
11g
CREATE INDEX … [ONLINE]
ALTER INDEX … REBUILD [ONLINE]
12c
ALTER TABLE … DROP CONSTRAINT … [ONLINE]
ALTER TABLE … SET UNUSED … [ONLINE]
DROP INDEX … [ONLINE]
ALTER INDEX … UNUSABLE [ONLINE]
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ONLINE OPERATIONS
12c
ALTER INDEX … INVISIBLE
ALTER INDEX … VISIBLE
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Invisible
Indexes
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INVISIBLE INDEXES
Maintained by DML
Invisible to the optimizer
Unless optimizer_use_invisible_indexes is true
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ONLINE OPERATIONS
Adding a new column to a non-empty table
An optional column with no default
As of 11g, adding a mandatory column with default is
a meta-data only operation:
Fast
No space
No redo
No undo
Online
As of 12c, the same is true also for optional columns
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“ALMOST ONLINE” OPERATIONS
> drop index t_idx;
drop index t_idx
*
ERROR at line 1:
ORA-00054: resource busy and acquire with NOWAIT specified
or timeout expired
Elapsed: 00:00:00.00
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DDL_LOCK_TIMEOUT
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“ALMOST ONLINE” OPERATIONS
> alter session set ddl_lock_timeout=2;
Session altered.
> drop index t_idx;
drop index t_idx
*
ERROR at line 1:
ORA-00054: resource busy and acquire with NOWAIT specified
or timeout expired
Elapsed: 00:00:02.02
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“ALMOST ONLINE” OPERATIONS
> alter session set ddl_lock_timeout=2;
Session altered.
> drop index t_idx;
Index dropped.
Elapsed: 00:00:00.95
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“ALMOST ONLINE” OPERATIONS
ALTER TABLE ADD CONSTRAINT
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Online
Operations
ENABLE
NOVALIDATE
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“ALMOST ONLINE” OPERATIONS
ALTER TABLE ADD CONSTRAINT
ALTER TABLE ADD CONSTRAINT ENABLE NOVALIDATE
ALTER TABLE ENABLE VALIDATE CONSTRAINT
103. This presentation is available in http://db-oriented.com/presentations
©OrenNakdimon
INDEX REBUILD?
index on T(CREATION_TIME)
select … from T where CREATION_TIME between …
104. This presentation is available in http://db-oriented.com/presentations
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Index
Coalesce
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INDEX REBUILD?
index on T(CREATION_TIME)
select … from T where CREATION_TIME between …
106. This presentation is available in http://db-oriented.com/presentations
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INDEX REBUILD?
index on T(CREATION_TIME)
select … from T where CREATION_TIME between …
107. This presentation is available in http://db-oriented.com/presentations
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Edition
Based
Redefinition
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Procedure P
Procedure P
My Schema
Edition1
Edition2
procedure p is
begin
-- do something
end p;
create or replace
procedure p as
begin
-- do something else
end p;
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Procedure
P
My Schema
Edition1
Edition2
Function
F
Procedure
P
View
V
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Procedure
P
My Schema
Edition1
Edition2
Function
F
Procedure
P
View
V
Edition3
Function
F
Package
PKG
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Procedure
P
My Schema
Edition1
procedure p is
...
select name
into ...
from people
...
Table
PEOPLE
- id
- name
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Procedure
P
My Schema
Edition1
Edition2
Edition3
Procedure
P
procedure p is
...
select name
into ...
from people
...
Table
PEOPLE
- id
- name
- first_name
- last_nameprocedure p is
...
select
first_name,
last_name
into ...
from people
...
113. This presentation is available in http://db-oriented.com/presentations
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Procedure
P
My Schema
Edition1
Edition2
Edition3
Procedure
P
Editioning
View
PEOPLE
Editioning
View
PEOPLE
Table
PEOPLE$T
- id
- name
- first_name
- last_name
create editioning view people
as select id, name
from people$t
create editioning view people
as select id, first_name, last_name
from people$t
select name
into ...
from people
select
first_name, last_name
into ...
from people
114. This presentation is available in http://db-oriented.com/presentations
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I LOVE EBR BECAUSE…
It enables to apply any change in an online
fashion
The upgrade is performed in the privacy of a
new unexposed edition
The upgrade can be done at any time
Supported everywhere (since Oracle 11.2),
including standard edition
115. This presentation is available in http://db-oriented.com/presentations
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Partition
Views
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PARTITION VIEWS
T1
T2
T3
T4alter table add partition create table
create or replace view
drop tablealter table drop partition
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PARTITION VIEWS
> desc events_01
Name Null? Type
--------------------------- -------- ----------------------------
EVENT_ID NOT NULL NUMBER
EVENT_TIME NOT NULL DATE
EVENT_TYPE_ID NOT NULL NUMBER
DETAILS VARCHAR2(100)
create or replace view events as
select * from events_01
where event_time >= date'2016-01-01'
and event_time < date'2016-02-01'
union all
select * from events_02
where event_time >= date'2016-02-01'
and event_time < date'2016-03-01'
union all
select * from events_03
where event_time >= date'2016-03-01'
and event_time < date'2016-04-01'
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PARTITION VIEWS
select event_type_id,count(*)
from events
where event_time between date'2016-02-20' and date'2016-02-22'
group by event_Type_id;
-------------------------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
-------------------------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 7 | 21 | 19 (6)| 00:00:01 |
| 1 | HASH GROUP BY | | 7 | 21 | 19 (6)| 00:00:01 |
| 2 | VIEW | EVENTS | 2884 | 8652 | 18 (0)| 00:00:01 |
| 3 | UNION-ALL | | | | | |
|* 4 | FILTER | | | | | |
| 5 | TABLE ACCESS BY INDEX ROWID BATCHED| EVENTS_01 | 1 | 11 | 3 (0)| 00:00:01 |
|* 6 | INDEX RANGE SCAN | EVENT_01_TIME_IDX | 1 | | 2 (0)| 00:00:01 |
| 7 | TABLE ACCESS BY INDEX ROWID BATCHED | EVENTS_02 | 2882 | 31702 | 18 (0)| 00:00:01 |
|* 8 | INDEX RANGE SCAN | EVENT_02_TIME_IDX | 2882 | | 9 (0)| 00:00:01 |
|* 9 | FILTER | | | | | |
| 10 | TABLE ACCESS BY INDEX ROWID BATCHED| EVENTS_03 | 1 | 11 | 3 (0)| 00:00:01 |
|* 11 | INDEX RANGE SCAN | EVENT_03_TIME_IDX | 1 | | 2 (0)| 00:00:01 |
-------------------------------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
4 - filter(NULL IS NOT NULL)
6 - access("EVENT_TIME">=TO_DATE(' 2016-02-20 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND
"EVENT_TIME“ <TO_DATE(' 2016-02-01 00:00:00', 'syyyy-mm-dd hh24:mi:ss'))
8 - access("EVENT_TIME">=TO_DATE(' 2016-02-20 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND
"EVENT_TIME"<=TO_DATE(' 2016-02-22 00:00:00', 'syyyy-mm-dd hh24:mi:ss'))
9 - filter(NULL IS NOT NULL)
11 - access("EVENT_TIME">=TO_DATE(' 2016-03-01 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND
"EVENT_TIME"<=TO_DATE(' 2016-02-22 00:00:00', 'syyyy-mm-dd hh24:mi:ss'))
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PARTITION VIEWS
select count(details)
from events
where event_time between date'2016-01-10' and date'2016-02-22'
and event_type_id = 1;
-------------------------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
-------------------------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 | 74 | 79 (2)| 00:00:01 |
| 1 | SORT AGGREGATE | | 1 | 74 | | |
| 2 | VIEW | EVENTS | 12366 | 893K| 79 (2)| 00:00:01 |
| 3 | UNION-ALL | | | | | |
|* 4 | TABLE ACCESS FULL | EVENTS_01 | 6367 | 99K| 40 (0)| 00:00:01 |
|* 5 | TABLE ACCESS FULL | EVENTS_02 | 5998 | 95968 | 38 (0)| 00:00:01 |
|* 6 | FILTER | | | | | |
|* 7 | TABLE ACCESS BY INDEX ROWID BATCHED| EVENTS_03 | 1 | 16 | 3 (0)| 00:00:01 |
|* 8 | INDEX RANGE SCAN | EVENT_03_TIME_IDX | 1 | | 2 (0)| 00:00:01 |
-------------------------------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
4 - filter("EVENT_TYPE_ID"=1 AND
"EVENT_TIME">=TO_DATE(' 2016-01-10 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND
"EVENT_TIME"< TO_DATE(' 2016-02-01 00:00:00', 'syyyy-mm-dd hh24:mi:ss'))
5 - filter("EVENT_TYPE_ID"=1 AND
"EVENT_TIME"<=TO_DATE(' 2016-02-22 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND
"EVENT_TIME">=TO_DATE(' 2016-02-01 00:00:00', 'syyyy-mm-dd hh24:mi:ss'))
6 - filter(NULL IS NOT NULL)
7 - filter("EVENT_TYPE_ID"=1)
8 - access("EVENT_TIME">=TO_DATE(' 2016-03-01 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND
"EVENT_TIME"<=TO_DATE(' 2016-02-22 00:00:00', 'syyyy-mm-dd hh24:mi:ss'))
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PARTITION VIEWS
select count(details)
from events
where event_time between date'2016-01-10' and date'2016-02-22'
and event_type_id = 1;
-------------------------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
-------------------------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 | 74 | 79 (2)| 00:00:01 |
| 1 | SORT AGGREGATE | | 1 | 74 | | |
| 2 | VIEW | EVENTS | 12366 | 893K| 79 (2)| 00:00:01 |
| 3 | UNION-ALL | | | | | |
|* 4 | TABLE ACCESS FULL | EVENTS_01 | 6367 | 99K| 40 (0)| 00:00:01 |
|* 5 | TABLE ACCESS FULL | EVENTS_02 | 5998 | 95968 | 38 (0)| 00:00:01 |
|* 6 | FILTER | | | | | |
|* 7 | TABLE ACCESS BY INDEX ROWID BATCHED| EVENTS_03 | 1 | 16 | 3 (0)| 00:00:01 |
|* 8 | INDEX RANGE SCAN | EVENT_03_TIME_IDX | 1 | | 2 (0)| 00:00:01 |
-------------------------------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
4 - filter("EVENT_TYPE_ID"=1 AND
"EVENT_TIME">=TO_DATE(' 2016-01-10 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND
"EVENT_TIME"< TO_DATE(' 2016-02-01 00:00:00', 'syyyy-mm-dd hh24:mi:ss'))
5 - filter("EVENT_TYPE_ID"=1 AND
"EVENT_TIME"<=TO_DATE(' 2016-02-22 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND
"EVENT_TIME">=TO_DATE(' 2016-02-01 00:00:00', 'syyyy-mm-dd hh24:mi:ss'))
6 - filter(NULL IS NOT NULL)
7 - filter("EVENT_TYPE_ID"=1)
8 - access("EVENT_TIME">=TO_DATE(' 2016-03-01 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND
"EVENT_TIME"<=TO_DATE(' 2016-02-22 00:00:00', 'syyyy-mm-dd hh24:mi:ss'))
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PARTITION VIEWS
select count(details)
from events
where event_time between date'2016-01-10' and date'2016-02-22'
and event_type_id = 6;
-------------------------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
-------------------------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 | 74 | 42 (0)| 00:00:01 |
| 1 | SORT AGGREGATE | | 1 | 74 | | |
| 2 | VIEW | EVENTS | 2418 | 174K| 42 (0)| 00:00:01 |
| 3 | UNION-ALL | | | | | |
|* 4 | TABLE ACCESS FULL | EVENTS_01 | 2388 | 38208 | 40 (0)| 00:00:01 |
|* 5 | TABLE ACCESS BY INDEX ROWID BATCHED | EVENTS_02 | 29 | 464 | 2 (0)| 00:00:01 |
|* 6 | INDEX RANGE SCAN | EVENT_02_TYPE_IDX | 41 | | 1 (0)| 00:00:01 |
|* 7 | FILTER | | | | | |
|* 8 | TABLE ACCESS BY INDEX ROWID BATCHED| EVENTS_03 | 1 | 16 | 2 (0)| 00:00:01 |
|* 9 | INDEX RANGE SCAN | EVENT_03_TYPE_IDX | 1 | | 1 (0)| 00:00:01 |
-------------------------------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
4 - filter("EVENT_TYPE_ID"=6 AND
"EVENT_TIME">=TO_DATE(' 2016-01-10 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND
"EVENT_TIME“ <TO_DATE(' 2016-02-01 00:00:00', 'syyyy-mm-dd hh24:mi:ss'))
5 - filter("EVENT_TIME"<=TO_DATE(' 2016-02-22 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND
"EVENT_TIME">=TO_DATE(' 2016-02-01 00:00:00', 'syyyy-mm-dd hh24:mi:ss'))
6 - access("EVENT_TYPE_ID"=6)
7 - filter(NULL IS NOT NULL)
8 - filter("EVENT_TIME"<=TO_DATE(' 2016-02-22 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND
"EVENT_TIME">=TO_DATE(' 2016-03-01 00:00:00', 'syyyy-mm-dd hh24:mi:ss'))
9 - access("EVENT_TYPE_ID"=6)
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PARTITION VIEWS
It’s our responsibility to insert into the right
partition
EXCHANGE PARTITION is supported
Indexing
Local indexes are supported by definition
Global indexes are not (easily) supported
Partial indexes are supported by definition