درس قبلی
Use Unique Keys to Avoid Duplication

Use Unique Keys to Avoid Duplication

Use Unique Keys to Avoid Duplication

قسمت 12
درس بعدی

درباره این درس

There's one issue that we didn't address in the previous episode on many-to-many relationships. Currently, there's nothing keeping us from creating multiple records with identical post_id and tag_id combinations. Let's apply a UNIQUE index to solve this problem.
دیدگاه های کاربران

× در حال پاسخ به: