49:49

Case When

10:46

Group By + Order By in MySQL | Beginner MySQL Series

4:04:26

SQL Tutorial for Beginners [Ultimate Full Course] - From Zero to HERO

56:24

Learn SQL In 60 Minutes

27:49

How To Write SQL Server Queries Correctly: Common Table Expressions

54:15

Joins in SQL (part 1 )

41:20

Functions

1:03:02

Subquery