SQL · NULLs

SQL NULLs puzzles

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

• #462026-07-22
• #422026-07-18
• #412026-07-17
• #402026-07-16
• #382026-07-14
• #302026-07-06
• #282026-07-04
• #222026-06-28
• #182026-06-24
• #172026-06-23
• #162026-06-22
• #142026-06-20
• #62026-06-12
• #42026-06-10