mysql通过关联修改表中两个字段的值_MySQL

bitsCN.commysql通过关联修改表中两个字段的值 Sql代码 update A set a_field= (select realname from B where A.extension=B.extension and B.extension '') update A a inner join B b on a.extension=b.extension and a.extension '' set a.extenrealname =b.realname bitsCN.com