SQL · Grouping

SQL Grouping puzzles

20 SQL puzzles on grouping. Read the snippet, guess the output, then reveal the answer and why SQL behaves that way.

• #952026-09-09
• #932026-09-07
• #922026-09-06
• #912026-09-05
• #802026-08-25
• #712026-08-16
• #692026-08-14
• #682026-08-13
• #672026-08-12
• #562026-08-01
• #472026-07-23
• #452026-07-21
• #442026-07-20
• #432026-07-19
• #322026-07-08
• #232026-06-29
• #212026-06-27
• #202026-06-26
• #192026-06-25
• #82026-06-14