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.
Ainult CREATE/ALTER/DROP — lõpus pole vaja SELECT-i.
Logi sisse, et näha esituste ajalugu
Logi sisseLogi sisse, et kasutada AI mentorit
Logi sisseAlgskeemi pole
See ülesanne algab ilma tabeliteta — loo need käsuga CREATE TABLE.