Code RoomRuns of consecutive active days
HardPrep Room Coding #5122

Runs of consecutive active days

SQLAlgorithms & data structuresStaff~18 min

For each user, find their longest run of consecutive days with at least one event. Return `name` and `longest_run`, ordered by name.

What a strong answer looks like

Say what the query is meant to return before you write it, and name the shape of the answer: how many rows, grouped by what. Then watch the NULLs and the duplicates, because that is where most of these are lost.

Run onlyA query runs as one statement, so there is nothing to step through. Run it and read the rows.

0:00 of about 18 min

Expected, in this order

namelongest_run
Ari2
Bea1
Cai2
Dot1
Eli1

Your result

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