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Top Forums Shell Programming and Scripting Print unique names in a specific column using awk Post 302801505 by vidyadhar85 on Thursday 2nd of May 2013 06:01:33 AM
Old 05-02-2013
There was glitch in logic..

modified it
Code:
 
 
awk     '       {n=split ($4, T, ";")
                 for (i=n; i>=1; i--) {
                   for (j=i-1; j>=1; j--)
                     if (T[i]==T[j]) {delete T[i]; break}
                    }
                 $4 = T[1]
                 for (i=2; i<=n; i++) {if(T[i]){ $4=$4 ";" T[i]}}
                 $5 = split($4,A,";")
                }
         1
        ' OFS="\t" filename

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IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME
igawk - gawk with include files SYNOPSIS
igawk [ all gawk options ] -f program-file [ -- ] file ... igawk [ all gawk options ] [ -- ] program-text file ... DESCRIPTION
Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1). AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like @include getopt.awk in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path. OPTIONS
See gawk(1) for a full description of the AWK language and the options that gawk supports. EXAMPLES
cat << EOF > test.awk @include getopt.awk BEGIN { while (getopt(ARGC, ARGV, "am:q") != -1) ... } EOF igawk -f test.awk SEE ALSO
gawk(1) Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995. AUTHOR
Arnold Robbins (arnold@skeeve.com). Free Software Foundation Nov 3 1999 IGAWK(1)
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