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Remove duplicate

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# 1  
Old 05-23-2013
Remove duplicate
Hi ,
I have a pipe seperated file repo.psv where i need to remove duplicates based on the 1st column only. Can anyone help with a Unix script ?

Input:
Code:
15277105||Common Stick|ESHR||Common Stock|CYRO AB
15277105||Common Stick|ESHR||Common Stock|CYRO AB
16111278||Common Stick|ESHR||Common Stock|STANDARD REGISTER CO
39693766||Common Stick|ESHR||Common Stock|HS AG

Output should be :
Code:
15277105||Common Stick|ESHR||Common Stock|CYRO AB
16111278||Common Stick|ESHR||Common Stock|STANDARD REGISTER CO
39693766||Common Stick|ESHR||Common Stock|HS AG

Thanks
Last edited by Scott; 05-23-2013 at 04:33 PM.. Reason: Code tags
# 2  
Old 05-23-2013
Try
Code:
$ awk '!L[$1]++' file
15277105||Common Stick|ESHR||Common Stock|CYRO AB
16111278||Common Stick|ESHR||Common Stock|STANDARD REGISTER CO
39693766||Common Stick|ESHR||Common Stock|HS AG

You may need to redefine the field separator (man awk) if you want to use this on other files.
# 3  
Old 05-23-2013
Remove duplicate
We use solaris server. I used the below command from the command line but it resulted in 2 messages:
Code:
awk '!L[$1]++' xyz.psv

message:
Code:
awk: syntax error near line 1
awk: bailing out near line 1

Last edited by Scott; 05-23-2013 at 04:33 PM.. Reason: Code tags
# 4  
Old 05-23-2013
use nawk instead of awk
# 5  
Old 05-23-2013
Thanks nawk worked Smilie
But what is the diff between awk and nawk. We use solarix server.
# 6  
Old 05-24-2013
The solution present here is wrong awk '!L[$1]++'

OP request
pipe seperated file
based on the 1st column only
The solution above using the space as separator not the pipe |
15277105||Common vs correct 15277105

Correct solution (setting field separator to pipe):
Code:
awk -F\| '!L[$1]++'

# 7  
Old 05-24-2013
Thanks Pal. It worked as well.Smilie
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