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SQL skill

Time Series, Rolling & Period-over-Period

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

Date & time logic

SQL

Date & time

553
0 / 13 solvedStart →

Rolling & period-over-period

SQL

Running totals & cumulative

233
0 / 8 solvedStart →
SQL

Moving averages & rolling

232
0 / 7 solvedStart →
SQL

Period-over-period

233
0 / 8 solvedStart →