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Full Discussion: Remove somewhat Duplicate records from a flat file
Top Forums Shell Programming and Scripting Remove somewhat Duplicate records from a flat file Post 302560291 by Corona688 on Thursday 29th of September 2011 11:18:45 AM
Old 09-29-2011
It keeps stripping them out because you're not putting them in code tags.

It could be as simple as
Code:
awk 'NF>5' < infile > outfile

to exclude all records with less than 6 fields.

Or, if some 'short' fields do NOT have duplicates, then:

Code:
awk '{if(NF == 6)  {        K=$1 $3 $4 $5 $6;        }
        else           {        K=$1 $2 $3 $4 $5; }

        if(!L[K]) { O[N++]=K; L[K]=$0; }
        else if(length(L[K]) < length($0)) L[K]=$0; }
END { for(M=0; M<N; M++) print L[O[M]]; }' < data

 

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LEARN ABOUT LINUX

igawk

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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