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IBM COGNOS Report Query Question:  Limiting a list to only the latest entry for a given MsrCd

Posted on 2014-02-04
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Last Modified: 2014-02-05
In a Performance Measure History table is a list of when the users periodically key in their  info regarding their targets.
However, for most of the requested reports all that is wanted is the latest entry for a given Measure.  Measures are uniquely identified with a MsrCd#.
The History table not only has a unique date/time of entry, but each entry in the table creates a unique sequential ID.
None of the reports want to see either the entry date, MsrCd or the ID, and I have unsuccessfully been attempting to -behind the scenes- create such a filter, via “Data item”,  “Filter”, Query Calculation, etc. using the below syntax.  On occasion the syntax gets approved, but I do not accomplish my goal.

maximum ( [PM View prd].[DataTarget History].[ID]  for  [PM View prd].[DataTarget History].[MsrCd]  )

Assistance please.
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Question by:willjx
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RWrigley earned 500 total points
ID: 39835267
Probably the easiest way I can think of is to create a dataitem like:
rank([PM View prd].[DataTarget History].[ID]  for [PM View prd].[DataTarget History].[MsrCd]  )

Then add a detail filter for [rankMSR] = 1
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Author Closing Comment

by:willjx
ID: 39836536
Thank you very much.
You just saved me innnumerable hours of trial and error attempts. I was totally on a different track.
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