- w3resources
- Basic Select
- Restricting & Data sorting
- Aggregates & Group By
- String Functions
- Joins
- Subqueries
- Hacker Rank
- Basic Select
- Advanced Select
- Aggregations
- postgreSQL
- Basic
- Joins & Subqueries
- Aggregates
- Dates
- Strings
- </10^6>
- Basic SQL
- SQL Joins
- SQL Subqueries & temporary tables
- SQL Data Cleaning
- Sections 1, 3, and 4 are implemented using postgreSQL
- Section 2 is implemented using Oracle SQL