이 레슨은 당분간 영어로 제공돼요.
Rules that can't be skipped
Validation in your app gives friendly messages. Constraints in the database give guarantees: no script, bug or second service can write a row that breaks them.
이 레슨은 당분간 영어로 제공돼요.
Validation in your app gives friendly messages. Constraints in the database give guarantees: no script, bug or second service can write a row that breaks them.