如果我的表包含两列,一列用于用户ID,另一列用于指纹(出勤,请假)如何检测第一个指纹第二天(离开时间)的所有用户? / p>
USERID CHECKTIME
2982 2015-03-11 09:08:10.000
2982 2015-03-11 20:13:57.000
2982 2015-03-12 08:43:35.000
2982 2015-03-13 04:54:57.000
2982 2015-03-13 05:01:03.000
2982 2015-03-13 19:24:11.000
2982 2015-03-14 10:28:26.000
2982 2015-03-15 04:55:03.000
2982 2015-03-15 05:01:24.000
示例:此用户在2015-03-12
中的08:43:35.000
进行了检入
并在2015-03-13
04:54:57.000
我想查询所有有类似案例的用户,考虑到用户可能在同一天有两个以上的登记入住,所以我只想要第一个和(第二天的最后一个)
答案 0 :(得分:1)
假设所有用户都正确检查并且没有错过检查时间。
假设我们的架构是:
create table tblchk (USERID int, CHECKTIME datetime)
insert into tblchk values
(2982 ,'2015-03-11 09:08:10.000'),
(2982 ,'2015-03-11 20:13:57.000'),
(2982 ,'2015-03-12 08:43:35.000'),
(2982 ,'2015-03-13 04:54:57.000'),
(2982 ,'2015-03-13 05:01:03.000'),
(2982 ,'2015-03-13 19:24:11.000'),
(2982 ,'2015-03-14 10:28:26.000'),
(2982 ,'2015-03-15 04:55:03.000'),
(2982 ,'2015-03-15 05:01:24.000');
不,我们可以使用row number
指定哪个记录适用于enter time
,哪个是exit time
,ODD
是输入,Even
是退出:
select userid,
checktime,
case row_number()over(partition by userid order by checktime)%2
when 1 then 'Enter'
else 'Exit'
end [type]
from tblchk
结果是:
userid checktime type
2982 2015-03-11 09:08:10.000 Enter
2982 2015-03-11 20:13:57.000 Exit
2982 2015-03-12 08:43:35.000 Enter
2982 2015-03-13 04:54:57.000 Exit
2982 2015-03-13 05:01:03.000 Enter
2982 2015-03-13 19:24:11.000 Exit
2982 2015-03-14 10:28:26.000 Enter
2982 2015-03-15 04:55:03.000 Exit
2982 2015-03-15 05:01:24.000 Enter
现在,如果我们要指定上次检查时间为enter
且第二天的第一个检查时间为exit
,我们可以将以上查询用作:
with cte as
(
select userid,
checktime,
row_number()over(partition by userid order by checktime) rn
from tblchk
)
select q_enter.userid as [USER],
q_enter.checktime as EnterTime,
q_exit.checktime as ExitTime
from
(
select userid,
max(checktime) checktime,
max(rn) rn
from cte
group by userid,cast(checktime as date)
having max(rn)%2=1
)q_enter
join
(
select userid,
min(checktime) checktime,
min(rn) rn
from cte
group by userid,cast(checktime as date)
having min(rn)%2=0
)q_exit
on q_enter.userid=q_exit.userid and q_enter.rn=q_exit.rn-1
结果:
USER EnterTime ExitTime
2982 2015-03-12 08:43:35.000 2015-03-13 04:54:57.000
2982 2015-03-14 10:28:26.000 2015-03-15 04:55:03.000
答案 1 :(得分:0)
您可以使用min和max之类的聚合函数,它们给出了前进和后出值
你可以在这里查看 http://sqlfiddle.com/#!9/68897/2SELECT USERID,MIN(CHECKTIME),MAX(CHECKTIME)来自关注GROUP BY USERID;