이 레슨은 당분간 영어로 제공돼요.
From numbers to names
posts stores user_id 3, but your feed shows "leila". A join combines rows from two tables wherever a condition matches, and it is the most important tool in a relational database.
이 레슨은 당분간 영어로 제공돼요.
posts stores user_id 3, but your feed shows "leila". A join combines rows from two tables wherever a condition matches, and it is the most important tool in a relational database.