Displaying 1 result from an estimated 1 matches for "wtdt".
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wdt
2012 May 02
2
selection by two unique variables
Dear Group,
I am working with a large dataset where I need to select for each unique id
the the unique lastpk row. Here is a sample subject:
id wtdt wt lastpk
64050256 2010-09-18 275 2010-09-16
64050256 2010-09-19 277 2010-09-18
64050256 2010-09-20 272 2010-09-18
64050256 2010-09-21 277 2010-09-18
I want the result as:
id wtdt wt lastpk
64050256 2010-09-18 275 2010...