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Pattern

Moving averages & rolling

7 problemsin this pattern, climbing easy → medium → hard. Pick wherever you're calibrated.

EZ

Easy

0 / 2 solved

Trailing 2-order rolling average per customer
SQL · ~6 min
NEW
Centered 3-day moving average of paid daily revenue
SQL · ~7 min
NEW

MD

Medium

0 / 3 solved

Trailing 3-day moving average of daily revenue
SQL · ~8 min
NEW
Distinct buyers in trailing 7-day window per day
SQL · ~12 min
NEW
Trailing 3-day MA with min-periods=3 rule
SQL · ~8 min
NEW

HD

Hard

0 / 2 solved

Densify daily revenue then 3-day rolling average
SQL · ~15 min
NEW
MA2 vs MA3 ratio of daily revenue
SQL · ~12 min
NEW