SQL Full Outer Join
- by Torment March
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.