#1047

No Duplicate Team Memberships

Design the memberships table for team participation. It needs id as the primary key, user_id, and team_id; the same pair of user_id and team_id must appear at most once.

Kun CREATE/ALTER/DROP — ingen afsluttende SELECT nødvendig.

Resultatet af din forespørgsel vises her

Intet startskema

Denne opgave starter uden tabeller — du opretter dem via CREATE TABLE.