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Remove duplicate based on Group

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# 1  
Old 03-21-2012
Remove duplicate based on Group
Hi,

How can I remove duplicates from a file based on group on other column? for example:

Test1|Test2|Test3|Test4|Test5
Test1|Test6|Test7|Test8|Test5
Test1|Test9|Test10|Test11|Test12
Test1|Test13|Test14|Test15|Test16
Test17|Test18|Test19|Test20|Test21
Test17|Test22|Test23|Test24|Test5



First we need to look at column 1 and then remove the duplicate rows based on column 5. Column 1 has two groups Test1 and Test17 so we have to find duplicates in column 5 based on column 1. Output of this file is:

Test1|Test2|Test3|Test4|Test5
Test1|Test9|Test10|Test11|Test12
Test1|Test13|Test14|Test15|Test16
Test17|Test18|Test19|Test20|Test21
Test17|Test22|Test23|Test24|Test5
# 2  
Old 03-21-2012
This should work:

Code:
awk -F "|" ' ! s[$1,$5]++ ' input-file >output-file

Last edited by agama; 03-21-2012 at 08:58 PM.. Reason: shrinkage :)
This User Gave Thanks to agama For This Post:
yale_work
# 3  
Old 03-21-2012
Thanks.
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