coalesce，sql函数去判断查询出来的东西符合条件返回‘0’，否则返回1

Posted 2022-04-27 指导毕业设计Monkey

       select

        lcaa.clmnum,
        COALESCE((SELECT 1 FROM clm_subtask_swfswti sub WHERE t.clmnum=sub.clmnum LIMIT 1),'0') AS iscleancase-- 是否清洁件

        from clm_baseinfo_lcaa lcaa
        LEFT JOIN clm_worktask_swflwti t  on lcaa.clmnum = t.clmnum
        and t.status = 1

        where lcaa.status = 1
        and lcaa.procecode='C'
        and lcaa.inspectflag is null
       
        and t.submitdte BETWEEN CAST(date_format(date_add(now(), interval - 1 day),'%Y%m%d') AS SIGNED integer) AND CAST(date_format(date_add(now(), interval - 1 day),'%Y%m%d') AS SIGNED integer)


        -- perid 是有效的督查规则那边传递过来的外包商id
        <if test="perid!=null and perid!=''">
            and t.fircheckusr in (#perid)

        </if>