SQL practice questions

1. 1. Prepare the below tables in database in the given format (H21_Employee_Empid)
A) Employee
Column Name Data Type Size
Employee_Id Number 6
First_Name Varchar2 20
Last_Name Varchar2 25
Email_Id Varchar2 14
Phone_Number Varchar2 20
Hire_Date Date
Job_Id Varchar2 10
Salary Number 8,2
Commission_Percent Number 2,2
Manager_Id Number 6
Department_Id Number 4
Insert into the above table below values
Emplo
yee_Id
First_N
ame
Last_N
ame
Email_
Id
Phone_
Numbe
r
Hire_D
ate
Job_Id Salary Commi
ssion_P
ercent
Manag
er_Id
Depart
ment_I
d
100 Sailaja Balgeri sb 515.123
.1421
06/17/8
7
AD_PR
ES
24000 0.9 90
101 Neelim
a
Atmuri na 515.124
.1431
09/21/8
9
AD_VP 17000 0.9 100 90
102 Nitin Agarw
al
nag 514.123
.1543
01/13/9
3
AD_VP 17000 0.9 100 90
103 Prasan
th
Rathor
e
pr 515.124
.1421
01/03/9
0
IT_PR
OG
9000 0.6 102 60
104 Santos
h
Devun
uri
sd 514.152
.1278
21/05/9
1
IT_PR
OG
6000 0.6 103 60
107 Ravi ra 512.123
.1234
07/02/9
9
IT_PR
OG
4200 0.6 103 60
124 Vijay vi 513.235
.1246
16/11/9
9
ST_M
AN
5800 0.5 100 50
141 Naveen nav 512.124
.1234
17/10/9
5
ST_CL
ERK
3500 0.5 124 50
142 Amrith
a
am 512.124
.2345
29/01/9
7
ST_CL
ERK
3100 0.5 124 50
143 Srikant
h
G sg 512.123
.1245
15/03/9
8
ST_CL
ERK
2600 0.5 124 50

2. 144 Amol Singh as 09/07/9
8
ST_CL
ERK
2500 0.5 124 50
B) Department
Column Name Data Type Size
Department_Id Number 4
Department_Name Varchar2 30
Manager_Id Number 6
Location_Id Number 4
Insert into the above table below values
Department_Id Department_Name Manager_Id Location_Id
10 Administration 200 1700
20 Marketing 201 1800
50 Shipping 124 1500
60 IT 103 1400
80 Sales 149 2500
90 Executive 100 1700
110 Accounting 205 1700
190 Contracting 1700
C) Salgrade
Column Name Data Type Size
Grade_Level Varcahr2 3
Lowest_Sal Number 6
Highest_Sal Number 6
Insert into the above table below values
Grade_Level Lowest_Sal Highest_Sal
A 1000 2999
B 3000 5999
C 6000 9999
D 10000 14999
E 15000 24999
F 25000 40000
2. Create an Emp table with the following criteria:
Eno number(6)
Ename varchar2(30)
Sal number(8,2)
3. Add a column deptno with the datatype number of size 4

3. 4. Change the name of the column Sal to Salary
5. Change the size of a column Ename to 40 character long
6. Create a Dept table with the following criteria:
Dno number(6)
Dname varchar2(40)
loc_id number(4)
7. remove a column loc_id from dept table
8. change the name of the Dept to Departments
9. insert into emp table the below values
Eno Ename Salary Deptno
1 ANIL 20000 1001
2 ATUL 25000 2002
3 ARUL 30000 1001
4 AMIT 27000 3003
5 ANUP 35000 2002
6 ANIR 30000 1001
10. Insert into departments table the below information
Dno Dname
1001 MARKETING
2002 SALES
3003 EXECUTIVE
4004 IT
5005 PRODUCTION
11. Change the salary of all employees who belong to department number 1001 to 40000
12. Change the department number of ARUL to 2002
13. Remove the information of those employees who are earning 27000
14. Empty the table departments
15. Remove the table Departments from the database
16. Remove the table Emp from the database
17. Clear the recyclebin
18. Show the structure of the SALGRADE table.
19. Select all data from the DEPARTMENT table.
20. Show the structure of the EMPLOYEE table.
21. Write a query to display the last name,job code,hire date, and employee number for
each employee, with employee numbers appearing first. Provide an alias name
STARTDATE for the HIRE DATE column.
22. Write a query to display unique job codes from the EMPLOYEE table.
23. Write a query to display the last name concatenated with the job code, separated by a
comma and space
24. Create a query to display the last name and salary of employees earning more than
12,000.
25. Write a query to display the last name and department number for employee number
176.
26. Write a query to display the last name and salary of employees whose salary is not in

4. the range of 5,000 and 12,000.
27. Write a query to display the last name, job code and start date of employees hired
between February 20,1998 and May 1,1998. Order the query in the ascending order by
start date.
28. Write a query to display the last name and department number of all employees in
department number 20 and 50 in the alphabetical order by last name.
29. Write a query to display the last name and salary of employees who earn between
5,000 and 12,000 and are in the department 20 or 50. Label the columns as Employee
and Monthly Salary.
30. Write a query to display the last name and hire date of all employees who was hired in
1994.
31. Write a query to display the last name, salary and commission for all employees who
earn commission. Sort data in descending order of salary and commission.
32. Write a query to display the last names of all employees where the third letter of the
last name is an 'A'.
33. Write a query to display the last name of all employees who have an 'A' and 'E' in
their last name.
34. Write a query to display the last name,job and salary whose job is sales representative
or stock clerk and whose salary is not equal to 2500,3500,7000.
35. Write a query to display the current date
36. For each employee, display the employee number, last name and salary and the salary
increased by 15% ,rename it as New Salary
37. For the above query add a column called Increase which should contain the difference
between the old and new salaries.
38. Write a query that produces the following for each employee:
39. <employee last name> earns <salary> monthly but wants <3 times salary>. Label the
column as Dream Salaries.
40. Create a query to display the last name and salary for all employees. Format the salary
to be 15 character long, left-padded with $. label the column Salary.
41. Display each employee's last name,hire date, and salary review date, which is the first
Monday after six months of service. Label the column REVIEW. Format the dates to
appear in the format similar to “Monday, the Thirty-First of July, 2000”.
42. Display the last name, hire date, and day of the week on which the employee started.
Label the column DAY. Order the results by the day of the week.
43. Create a query that display's the employee's last names and indicates the amounts of
their annual salaries. Sort the data in the descending order of salary. Label the column
EMPLOYEE_AND_THEIR_SALARIES.