awk script to remove duplicate rows in line

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# 1  
Old 05-21-2009
awk script to remove duplicate rows in line

i have the long file more than one ns and www and mx in the line like .
i need the first ns record and first www and first mx from line .
the records are seperated with tthe ; i am try ing in awk scripting not getiing the solution.



I need out put like these


# 2  
Old 05-21-2009
#!/usr/bin/nawk -f
#/usr/xpg4/bin/awk -f
#/usr/bin/awk -f
BEGIN{ FS=";" }
split("",a); b=""
for(i=1;i<=NF;i++) {
  if (!a[f[1]]++) b=b?b";"$i:$i
print b

# 3  
Old 05-21-2009
 tr ';' '\n' < file| awk -F, '{if(!a[$1]) print $0;a[$1]=$0}'

-Devaraj Takhellambam
# 4  
Old 05-21-2009
Another sol:
awk '! a[$1]++' FS="(;)|(,)" RS=';' filename

# 5  
Old 06-02-2009

tks for quick reply
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