MySQL:内部连接与 Where

Question

两者之间的性能(在 mysql 中)是否存在差异

Select * from Table1 T1 
Inner Join Table2 T2 On T1.ID = T2.ID

和

Select * from Table1 T1, Table2 T2 
Where T1.ID = T2.ID

?

Answer 1

从问题 44917 中接受的答案中提取:

Performance wise, they are exactly the same (at least in SQL Server) but be aware that they are deprecating the implicit outer join syntax.

在 MySql 中结果是一样的。

我个人会坚持明确地加入表格...这是“社会可接受的”方式。