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Python pattern

Joins & merges

4 problems in this pattern, climbing easy → medium → hard. Pick wherever you're calibrated.

Medium

0 / 2 solved

Find orders with no matching customer
Python · ~12 min
NEW
Per-customer revenue without fan-out inflation
Python · ~14 min
NEW

Hard

0 / 2 solved

As-of join: price effective at each trade
Python · ~16 min
NEW
Apply a batch of changes to an SCD2 dimension
Python · ~30 min
NEW