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SQL skill

Real-World Data

24 problems across 4 subtopics. Pick a subtopic to start — each climbs easy → hard.

SQL
5 easy4 medium2 hard

Dates & Timestamps

0 / 11 solvedStart →
SQL
3 easy2 medium2 hard

String Functions

0 / 7 solvedStart →
SQL
1 easy1 medium1 hard

Data Types & CAST

0 / 3 solvedStart →
SQL
1 easy1 medium1 hard

JSON & Semi-structured

0 / 3 solvedStart →