SELECT scls_id , user_id , scls_nm FROM class WHERE user_id = #{userId} INSERT INTO class( scls_id , user_id , scls_nm ) VALUES ( #{sclsId} , #{userId} , #{sclsNm} ); UPDATE class SET scls_nm = #{sclsNm} WHERE scls_id = #{sclsId} DELETE FROM class WHERE scls_id = #{sclsId} SELECT COUNT(*) FROM class WHERE scls_id = #{sclsId}