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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
Hi,

I have an input file as shown below:

Code:
20140102;13:30;FR-AUD-LIBOR-1W;2.495
20140103;13:30;FR-AUD-LIBOR-1W;2.475
20140106;13:30;FR-AUD-LIBOR-1W;2.495
20140107;13:30;FR-AUD-LIBOR-1W;2.475
20140108;13:30;FR-AUD-LIBOR-1W;2.475
20140109;13:30;FR-AUD-LIBOR-1W;2.475
20140110;13:30;FR-AUD-LIBOR-2W;2.475
20140113;13:30;FR-AUD-LIBOR-2W;2.605
20140114;13:30;FR-AUD-LIBOR-2W;2.605

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:

Code:
20140102;13:30;FR-AUD-LIBOR-1W;2.495
20140103;13:30;FR-AUD-LIBOR-1W;2.475
20140106;13:30;FR-AUD-LIBOR-1W;2.495
20140107;13:30;FR-AUD-LIBOR-1W;2.475
20140110;13:30;FR-AUD-LIBOR-2W;2.475
20140113;13:30;FR-AUD-LIBOR-2W;2.605

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

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