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08-08-2002
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finding first instance
I have a file with 3 columns. Often the first two will hold the same values and the third may differ. I only want one row for each.
i.e. aaa,bbb,1 aaa,bbb,2 aaa,bbb,3 xxx,yyy,1 xxx,yyy,2 zzz,rrr,5 Should be aaa,bbb,1 xxx,yyy,1 zzz,rrr,5 I just want the first instance of each pariing of column 1 and 2 - and it's 3rd column value and ignore any subsequent rows with the same 1st and second column pairing. |
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