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How to remove duplicate records with out sort

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# 1  
Old 02-28-2008
How to remove duplicate records with out sort
Can any one give me command How to delete duplicate records with out sort.

Suppose if the records like below:

345,bcd,789
123,abc,456
234,abc,456
712,bcd,789

out tput should be
345,bcd,789
123,abc,456

Key for the records is 2nd and 3rd fields.fields are seperated by colon(,).
# 2  
Old 02-28-2008
Try:

Code:
awk '!($2$3 in a){a[$2$3]++;print}' FS=',' file

# 3  
Old 02-28-2008
Java How about this code?
for i in `cat filename | cut -d "," -f2 | uniq`
do
sed -n '/'${i}'/{p;q;}' filename
done
# 4  
Old 02-28-2008
Or:

Code:
awk '!x[$2,$3]++' FS="," file

Use nawk or /usr/xpg4/bin/awk on Solaris.
# 5  
Old 02-29-2008
you can use 'uniq' command also to remove the duplicate records which is ver easy to use. Check out the man pages of this command
# 6  
Old 02-29-2008
Quote:
Originally Posted by girish.batra
you can use 'uniq' command also to remove the duplicate records which is ver easy to use. Check out the man pages of this command
You need a sorted input for uniq ....
# 7  
Old 02-29-2008
yes I agree with you that uniq like a sorted input
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