select * from a join b using same_column
select * from a join b on a.same_column = b.same_columen
标准写法
select * from from a,b where a.same_column = b.same_column
三种写法一样
select * from a join b using same_column
select * from a join b on a.same_column = b.same_columen
标准写法
select * from from a,b where a.same_column = b.same_column
三种写法一样
