#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.

Solo CREATE/ALTER/DROP — no hace falta un SELECT al final.

Aquí aparecerá el resultado de tu consulta

Sin esquema inicial

Este ejercicio no incluye tablas iniciales: tendrás que crearlas con CREATE TABLE.