SQL Full Outer Join
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by
Torment March
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Published on 2011-11-26T01:36:35Z
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2011/11/26
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I have a table named 'Logs' with the following values :
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
I want to use the previous table to produce a result of:
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
So far I have come up with this result set :
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 15:45:00 NULL
The problem is I cannot generate the log without CheckIns :
CheckDate CheckIn CheckOut
-----------------------------------------
2011-11-25 NULL 15:40:00
The sequence of CheckIn - CheckOut pairing and order is in increasing time value.
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