EraCode practice
Daily SQL Pattern: Greatest-N-Per-Group (Latest row per user)
SQLintermediateMulti-Part
Summary
Practice a common SQL idiom for picking the latest record per group using a window function, plus a quick concept check about trade-offs.
Problem preview
### Goal Write a query that returns the **latest event per user**. - For each , return exactly one row: the most recent . - If there’s a tie on , pick the row with the **largest **. - Output columns:…
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