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Delete duplicate row based on criteria

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# 1  
Old 03-17-2016
Delete duplicate row based on criteria


I have an input file as shown below:


I need to remove the duplicates based on the last column value however the criteria is tricky as I need to retain history if the column value changes between dates. The expected output is as follows:


# 2  
Old 03-17-2016
awk -F";" '{if ($3"|"$4 != prev ) {print }prev=$3"|"$4}' filename

This User Gave Thanks to pravin27 For This Post:
# 3  
Old 03-17-2016
Thanks Pravin27 it worked.

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