SQL Arena
#1116

Each rider's first trip

For a welcome campaign we need each rider's first trip. For every rider, find the earliest trip by start time; on a tie, take the trip with the smaller id. Return rider_id and trip_id, ordered by rider.

Expected output sample

This is what a correct answer looks like — its row count is its own, it doesn't have to match the schema tables.

trip_idrider_id
11
22
43
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