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How to Identify Records with Overlapping Dates



 
 
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Old December 2nd, 2009, 07:14 PM posted to microsoft.public.access.queries
DudeGenius
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Posts: 5
Default How to Identify Records with Overlapping Dates

I need to be able to systematically identify any instance where there are
overlapping date ranges in a data set. I need to pull records like those
listed below out of a larger data set. I previously posted a question similar
to this and was advised to pull the same table in a query, match on Member
Number, and qualify that the product code from TableA did not match product
code in TableA_1 where the Begin Date TableA was Term date TableA_1 and
TableA_1 Begin Date TableA End Date. Which worked great for me finding
overlapping records where the product was different, but now I also need to
find them when the product is the same

ProductCode MemberNumber Begin Date End Date
PFFS 123456789A 20090101 20091231
PFFS 123456789A 20081201 29991231

Thanks for you help
 




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