update sys_taskqd SET serid=#{serid}, num=#{num} where id = #{id} select jnum, num, serid from sys_taskqd where id = #{id} SELECT A.*,IFNULL(B.num,0) as nums FROM ( select * from sys_taskqd where 1=1 and find_in_set(#{serid}, serid)) A LEFT JOIN (SELECT COUNT(*) as num,hdid,serid FROM sys_taskfk WHERE serid=#{serid} GROUP BY hdid,serid) B ON A.id=B.hdid and id NOT IN ( SELECT id FROM sys_taskqd WHERE find_in_set(#{serid}, serid ))) A LEFT JOIN (SELECT COUNT(*) as num,hdid,serid FROM sys_taskfk WHERE serid=#{serid} GROUP BY hdid,serid) B ON A.id=B.hdid