如何用一条SQL语句删除两个关联表的记录？

有两个表：group_file和teach_classroom，其中的group_file.group_id和teach_classroom.classroom_id对应惟一测试 一条语句删除两个表的内容：ssr select a.*,b.classroom_nameclassfrom group_file a,teach_classroom b where a.group_id=b.classr

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