Sql

6 free sql lessons — newest first.

Sql lessons

3:30Free

SQL Lesson 6: Why NULL = NULL Never Returns True

Sql

3:36Free

SQL Lesson 5: Why Does OFFSET 1000000 Crawl?

Sql

3:38Free

SQL Lesson 4: Why Do Your Rows Come Back in Random Order?

Sql

4:01Free

SQL Lesson 3: Why Does WHERE age > 21 OR 25 Silently Return Everyone?

Sql

3:49Free

SQL Lesson 2: Pull 3 Rows From 1,000,000 in One Line

Sql

4:28Free

SQL Lesson 1: Every App You Use Is Just Boxes in a Cabinet

Sql