#1057

One Primary Address

Design the addresses table for user addresses. It must store id as the primary key, user_id, and the is_primary flag; a user may have many addresses, but the database must prevent more than one row with is_primary = true for the same user_id.

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.