A deck showing an intro to SQL from a programmers perspective.

1. SQL
Why ‘Little Bobby Tables’ is funny
https://xkcd.com/327/

2. Hello!
I am Erik Tank
You can find me at @erik_tank
You can this talk at: https://github.com/skeletonkey/SQL_Intro

3. What is SQL?
• Structured Query Language
• ANSI (American National Standard Inst) standard*
• Allows for interactions with databases
• RDBMS (Relational DB Management System)
• MySQL, ProstgreSQL, et.al

4. 1970
“A Relational Model of Data for Large Shared Data Banks”
- Edgar Frank Codd
1970s
* SQL first developed (Raymond Boyce, Donald Chamberlin)
* Released to the public
1986
1st ANSI released
Sources: https://www.businessnewsdaily.com/5804-what-is-sql.html
SQL Primer by Rahul Batra (ISBN: 978-1-4842-3575-1)

5. Databases consists of…
• Tables
• Collection of data
• Columns (attributes)
• Rows (values)

6. Collection of Data:

7. Sample DB

8. Normalization
vs

9. 100% Normalized

10. Select Statement

11. Select Statement

12. Select Statement

13. Select Statement

14. Select Statement

15. Select Statement

16. Select Statement

17. Sub-queries

18. Explain Yourself!

19. Conditionals
• track_number = 1 or track_number = 2
• track_number in (1,2)
• track_number between 1 and 2
• name like ‘%week%’
• name ilike ‘%WEEK%’ *

20. Insert

21. Update

22. Delete

23. Do’s and DON’Ts
• SANITIZE YOUR INPUTS!!!!!!

24. Do’s and DON’Ts
• SQL in code

25. Do’s and DON’Ts
• Schema is your contract

26. Do’s and DON’Ts
• Atomicity (ACID)
• begin transaction;
• rollback transaction;
• commit transaction;

27. Do’s and DON’Ts
• DELETE statements
• Test
• Test
• Test!!!!
DELETE

28. Do’s and DON’Ts
• Table names should be singular
• ID fields are just ‘id’
• Columns name should NOT be reserved words
• ‘id’ field is ONLY for the DB
• UUID field is ONLY for the user

29. Questions?
You can find me at @erik_tank
You can this talk at:
https://github.com/skeletonkey/SQL_Intro

30. Questions?
You can find me at @erik_tank
You can this talk at:
https://github.com/skeletonkey/SQL_Intro

31. Questions?
You can find me at @erik_tank
You can this talk at:
https://github.com/skeletonkey/SQL_Intro