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Full Discussion: Help need to compare columns in files
Top Forums UNIX for Dummies Questions & Answers Help need to compare columns in files Post 302912697 by RudiC on Monday 11th of August 2014 12:20:40 PM
Old 08-11-2014
Some general comments to your approach:

There are syntax errors in it:
Code:
awk -F\| 'NR=FNR{a[$2}=$2,next}a[$2]!=$2{print "Different"}' file1 file2
            ^        ^   ^--- must be a ;
            |        |---  must be a ]
            |--- must be ==

as well as logical flaws:
Code:
awk -F\| 'NR=FNR{a[$2}=$2,next}a[$2]!=$2{print "Different"}' file1 file2
                    ^                  ^--- as $2 is always 1, there will always be a match
                    |--- shouldn't that be NR, and the second reference's index FNR?

Try to eliminate those, and we'll discuss further.
 

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xzdiff

XZDIFF(1)							     XZ Utils								 XZDIFF(1)

NAME

       xzcmp, xzdiff, lzcmp, lzdiff - compare compressed files

SYNOPSIS

       xzcmp [cmp_options] file1 [file2]
       xzdiff [diff_options] file1 [file2]
       lzcmp [cmp_options] file1 [file2]
       lzdiff [diff_options] file1 [file2]

DESCRIPTION

       xzcmp  and  xdiff invoke cmp(1) or diff(1) on files compressed with xz(1), lzma(1), gzip(1), or bzip2(1).  All options specified are passed
       directly to cmp or diff.  If only one file is specified, then the files compared are file1 (which must have a suffix of	a  supported  com-
       pression  format)  and  file1 from which the compression format suffix has been stripped.  If two files are specified, then they are uncom-
       pressed if necessary and fed to cmp(1) or diff(1).  The exit status from cmp or diff is preserved.

       The names lzcmp and lzdiff are provided for backward compatibility with LZMA Utils.

SEE ALSO

       cmp(1), diff(1), xz(1), gzip(1), bzip2(1), zdiff(1)

BUGS

       Messages from the cmp(1) or diff(1) programs refer to temporary filenames instead of those specified.

Tukaani 							    2009-07-05								 XZDIFF(1)
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