mysql处理打卡外勤主键，联合主键约束更新不了数据

create table ts_2020_emp_grant as
select * from ts_clock_emp_grant;

---查询大于1条--
select * from ts_clock_emp_grant where EMP_CODE in ( 
select EMP_CODE from( 
select EMP_CODE from ts_clock_emp_grant  where INVALID_DATE>='2020-03-01'  and INVALID_DATE<='2020-03-29' group by EMP_CODE having count(EMP_CODE) > 1) tmp 
) 
and INVALID_DATE not in( 
select INVALID_DATE from ( 
select max(INVALID_DATE) as INVALID_DATE from ts_clock_emp_grant  where INVALID_DATE>='2020-03-01'  and INVALID_DATE<='2020-03-29' group by EMP_CODE having count(EMP_CODE) > 1) tmp 
) ;

---更新这个时间段---

update   ts_clock_emp_grant set EFFECTIVE_DATE='2020-01-01',INVALID_DATE='2020-03-30' where INVALID_DATE>='2020-03-01'  and INVALID_DATE<='2020-03-29';

--保留一条最大的--如果出现2条以上多执行删除重复的失效时间处理去重
delete from ts_clock_emp_grant where EMP_CODE in ( 
select EMP_CODE from( 
select EMP_CODE from ts_clock_emp_grant  where INVALID_DATE>='2020-03-01'  and INVALID_DATE<='2020-03-29' group by EMP_CODE having count(EMP_CODE) > 1) tmp 
) 
and INVALID_DATE not in( 
select INVALID_DATE from ( 
select max(INVALID_DATE) as INVALID_DATE from ts_clock_emp_grant  where INVALID_DATE>='2020-03-01'  and INVALID_DATE<='2020-03-29' group by EMP_CODE having count(EMP_CODE) > 1) tmp 
);

 

--保留一条最大的--如果出现2条以上多执行删除重复的用ID处理去重

这个比较好

select * from ts_clock_emp_grant where EMP_CODE in ( 
select EMP_CODE from( 
select EMP_CODE from ts_clock_emp_grant  where INVALID_DATE>='2019-03-01'  and INVALID_DATE<='2020-03-29'  group by EMP_CODE having count(EMP_CODE) > 1) tmp 
) 
and id not in( 
select id from ( 
select max(id) as id from ts_clock_emp_grant  where INVALID_DATE>='2019-03-01'  and INVALID_DATE<='2020-03-29' group by EMP_CODE having count(EMP_CODE) > 1) tmp 
) ;.