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Pattern

Incremental merge & CDC

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

MD

Medium

0 / 2 solved

Which source keys a MERGE would insert
SQL · ~8 min
NEW
Count source rows per key before a MERGE
SQL · ~7 min
NEW

HD

Hard

0 / 2 solved

Classify each source key: insert or matched
SQL · ~12 min
NEW
Find the keys that would break a MERGE
SQL · ~12 min
NEW