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datetime当我只选择日期时间时，我需要显示。因为我尝试运行 SQL 但显示所有datetime.

表Emp：

EmpNo   fullName
00001   Midna
00002   Klog
00003   Porla
00004   Seka
00005   Mila

表tFile：

EmpNo   cDate                     cTime
00001   2012-10-29 00:00:00.000   2012-10-29 07:52:00.000
00001   2012-10-29 00:00:00.000   2012-10-29 19:00:00.000
00002   2012-10-29 00:00:00.000   2012-10-29 07:40:00.000
00002   2012-10-29 00:00:00.000   2012-10-29 19:32:00.000
00005   2012-10-29 00:00:00.000   2012-10-29 07:58:00.000
00005   2012-10-29 00:00:00.000   2012-10-29 18:35:00.000

这段代码

SELECT 
   em.EmpNo as 'EmpNo', 
   case 
       when tf.cDate <> null then tf.cDate 
            else coalesce(tf.cDate, '2012-10-29') 
   end as 'cDate', 
   Min(tf.cTime) as 'timeIn', 
   Max(tf.cTime) as 'timeOut'
FROM 
   tFile tf 
Full Outer join 
   Emp em On tf.EmpNo = em.EmpNo
Group By 
   em.EmpNo,tf.cDate
Order By 
   'EmpNo'

返回此结果：

EmpNo   cDate                     timeIn                     timeOut
-------------------------------------------------------------------------------------
00001   2012-10-21 00:00:00.000   2012-10-21 07:22:00.000    2012-10-21 17:35:00.000
00001   2012-10-24 00:00:00.000   2012-10-24 07:30:00.000    2012-10-24 19:00:00.000
00001   2012-10-29 00:00:00.000   2012-10-29 07:52:00.000    2012-10-29 19:00:00.000
00002   2012-10-25 00:00:00.000   2012-10-25 07:58:00.000    2012-10-25 18:35:00.000
00002   2012-10-22 00:00:00.000   2012-10-22 08:04:00.000    2012-10-22 17:55:00.000
00002   2012-10-24 00:00:00.000   2012-10-24 08:00:00.000    2012-10-24 18:45:00.000
00002   2012-10-29 00:00:00.000   2012-10-29 07:40:00.000    2012-10-29 19:32:00.000
00003   2012-10-29 00:00:00.000   NULL                       NULL
00004   2012-10-29 00:00:00.000   NULL                       NULL
00005   2012-10-28 00:00:00.000   2012-10-28 07:30:00.000    2012-10-28 19:20:00.000
00005   2012-10-27 00:00:00.000   2012-10-27 07:38:00.000    2012-10-27 19:30:00.000
00005   2012-10-29 00:00:00.000   2012-10-29 07:58:00.000    2012-10-29 18:35:00.000

但我需要这个结果：

我选择日期前。2012-10-29那么我只需要显示所有行2012-10-29。

但是有些Empno没有数据，2012-10-29它被设置为NULL。

EmpNo   cDate                     timeIn                     timeOut
---------------------------------------------------------------------------------------
00001   2012-10-29 00:00:00.000   2012-10-29 07:52:00.000    2012-10-29 19:00:00.000
00002   2012-10-29 00:00:00.000   2012-10-29 07:40:00.000    2012-10-29 19:32:00.000
00003   2012-10-29 00:00:00.000   NULL                       NULL
00004   2012-10-29 00:00:00.000   NULL                       NULL
00005   2012-10-29 00:00:00.000   2012-10-29 07:58:00.000    2012-10-29 18:35:00.000

谢谢你的时间。:)

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1 回答 1

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这个怎么样？

where(datediff(dd, coalesce(cTime, getdate()), getdate()) = 0

或者，如果你真的只想看 10 月 29 日：

where(datediff(dd, coalesce(cTime, '2012-10-29'), '2012-10-29') = 0
于 2012-10-29T14:57:40.107 回答