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.
Sampla aschuir a bhfuiltear ag súil leis
Seo é an chuma a bheadh ar fhreagra ceart — tá a líon rónna féin aige, ní gá dó na táblaí scéime a mheaitseáil.
| trip_id | rider_id |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 4 | 3 |
Logáil isteach chun stair na n-aighneachtaí a fheiceáil
Logáil isteachLogáil isteach chun an Meantóir IS a úsáid
Logáil isteach