SQL - Intro and Advanced
SQL Tutorials and big query first lessons
Suggested Steps:
1 - Getting Started
2 - Selecting Your Data
3 - Grouping with Having
4 - Ordering your Data
5 - As and With
6 - Joining Data
7 - Joins and Unions
8 - Analytic Functions
9 - Nested and Repeated Data
10 - Writting eficient Queries