我有两个名为Check Ins和Check Outs的派生表
检查Ins
CheckDate CheckIn
---------- ---------
08/02/2011 10:10:03
08/02/2011 15:57:16
07/19/2011 13:58:52
07/19/2011 16:50:55
07/26/2011 15:11:24
06/21/2011 12:36:47
08/16/2011 14:49:36
08/09/2011 13:52:10
08/09/2011 16:54:51
08/23/2011 15:48:58
09/06/2011 15:23:00
09/13/2011 10:09:27
09/13/2011 10:40:14
09/13/2011 11:43:14
09/13/2011 11:59:32
09/13/2011 17:05:24
09/20/2011 11:03:42
09/20/2011 12:08:50
09/20/2011 15:21:06
09/20/2011 15:34:29
09/27/2011 11:34:06
10/04/2011 11:37:59
10/04/2011 15:24:04
10/04/2011 16:57:44
10/11/2011 18:19:33
退房
CheckDate CheckOut
---------- ---------
08/02/2011 13:29:40
08/02/2011 17:02:25
07/12/2011 17:06:06
07/19/2011 16:40:15
07/19/2011 17:07:35
07/26/2011 14:48:10
07/26/2011 17:27:08
05/31/2011 17:01:39
06/07/2011 …是否可以使用BETWEEN语句作为LEFT JOIN的条件？
SELECT Table_1.*, Table_2.*
FROM Table_1 LEFT JOIN Table_2
ON Table_1.value BETWEEN Table_2.Value_1 AND Table_2.Value_2
我有一个名为'Logs'的表,其中包含以下值:
CheckDate CheckType CheckTime
-------------------------------------------
2011-11-25 IN 14:40:00
2011-11-25 OUT 14:45:00
2011-11-25 IN 14:50:00
2011-11-25 OUT 14:55:00
2011-11-25 IN 15:00:00
2011-11-25 OUT 15:05:00
2011-11-25 IN 15:15:00
2011-11-25 OUT 15:20:00
2011-11-25 IN 15:25:00
2011-11-25 OUT 15:30:00
2011-11-25 OUT 15:40:00
2011-11-25 IN 15:45:00
我想使用上一个表来产生以下结果:
CheckDate CheckIn CheckOut
-----------------------------------------
2011-11-25 14:40:00 14:45:00
2011-11-25 14:50:00 14:55:00
2011-11-25 15:00:00 15:05:00
2011-11-25 15:15:00 15:20:00
2011-11-25 15:25:00 15:30:00
2011-11-25 NULL 15:40:00
2011-11-25 15:45:00 NULL
到目前为止,我已经提出了这个结果集:
CheckDate CheckIn CheckOut
-----------------------------------------
2011-11-25 14:40:00 14:45:00
2011-11-25 14:50:00 14:55:00
2011-11-25 15:00:00 …