【sql】七種join語句

           今天看mysql視頻，裏邊老師給總結了一下七種join語句，感受挺好的。分享一下mysql select * from TableA a inner join TableB b on a.id =b.aid     select * from TableA a left join TableB b on a.id =b.aid select * from TableA a r

>>阅读原文<<