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Help with remove duplicate content

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# 1  
Old 11-14-2011
Help with remove duplicate content
Input file
Code:
data_1 10 US
data_1 2 US
data_1 5 UK
data_2 20 ENGLAND
data_2 12 KOREA
data_3 4 CHINA
.
.
data_60 123 US
data_60 23 UK
data_60 45 US

Desired output file
Code:
data_1 10 US
data_1 5 UK
data_2 20 ENGLAND
data_2 12 KOREA
data_3 4 CHINA
.
.
data_60 123 US
data_60 23 UK

If data content in column 1 and column 3 are exactly the same. Then print out only the first record.
Thanks for any advice.
# 2  
Old 11-14-2011
Code:
awk '!a[$1 FS $NF]++' infile

This User Gave Thanks to rdcwayx For This Post:
perl_beginner
# 3  
Old 11-14-2011
Code:
$
$
$ cat f20
data_1 10 US
data_1 2 US
data_1 5 UK
data_2 20 ENGLAND
data_2 12 KOREA
data_3 4 CHINA
data_60 123 US
data_60 23 UK
data_60 45 US
$
$
$ perl -lne '/(\S+)(\s+(\S+)){2}$/; defined $x{"$1:$3"} || print; $x{"$1:$3"}++' f20
data_1 10 US
data_1 5 UK
data_2 20 ENGLAND
data_2 12 KOREA
data_3 4 CHINA
data_60 123 US
data_60 23 UK
$
$

tyler_durden
This User Gave Thanks to durden_tyler For This Post:
perl_beginner
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