mysql的七种join

有这样两个表：sql 1、blog sql语句：io select * from tbl_dept a inner join tbl_emp b on a.id = b.depId;bfc 2、select sql语句：sql语句 select * from tbl_dept a left join tbl_emp b on a.id=b.deptId;nio 3、im sql语句d3 selec

>>阅读原文<<