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Question : Find the Minimum Date From and Maximium Date To from a list of continious Time Periods
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I have the following data:
RecID Member DateFrom DateTo
----------- ------ ------------------------------------------------------ ------------------------------------------------------
1 01 2005-01-01 00:00:00.000 2005-01-31 00:00:00.000
2 01 2005-02-01 00:00:00.000 2005-02-28 00:00:00.000
3 01 2005-03-01 00:00:00.000 2005-03-31 00:00:00.000
4 01 2005-06-01 00:00:00.000 2005-06-30 00:00:00.000
5 01 2005-07-01 00:00:00.000 2005-07-31 00:00:00.000
I need to pull the Minimum DateFrom and Maximum DateTo for each continious span. A Continoius span is defined as the DateFrom of the Record is one day more than the preceding DateTo
Output for this DataSet should be
MEmber DateFrom DateTo
------ ------------------------------------------------------ ------------------------------------------------------
01 2005-01-01 00:00:00.000 2005-3-31 00:00:00.00
01 2005-06-01 00:00:00.000 2005-7-31 00:00:00.00
Thank you in advance
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Answer : Find the Minimum Date From and Maximium Date To from a list of continious Time Periods
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I don't think so. The reason is that to determine continuous span you have to compare the DateFrom of row n+1 to the DateTo of row n. SQL does not provide any row level operations.
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