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Full Discussion: Compare three files based on two fields
Top Forums Shell Programming and Scripting Compare three files based on two fields Post 302748873 by Scrutinizer on Thursday 27th of December 2012 04:20:03 AM
Old 12-27-2012
pamu's suggestion could be shortened a bit further without a function:
Code:
awk -F\| '
{
  i=$1 FS $2
  A[i]++
  B[i]=(B[i]?B[i]",":i FS) FILENAME
}
END{
  for (i in A) if(A[i]<3) print B[i] FS
}' file*

But this would not count the occurrence of entries that occur multiple times in one file but not in other files. To counteract that, one could do something like this:

Code:
awk -F\| '
{
  i=$1 FS $2
}
!D[i,FILENAME]++{
  A[i]++
  B[i]=(B[i]?B[i]",":i FS) FILENAME
}
END{
  for (i in A) if(A[i]<3) print B[i] FS
}' file*

Last edited by Scrutinizer; 12-27-2012 at 05:30 AM..
 

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LEARN ABOUT MOJAVE

lkbib

LKBIB(1)						      General Commands Manual							  LKBIB(1)

NAME

       lkbib - search bibliographic databases

SYNOPSIS

       lkbib [ -v ] [ -ifields ] [ -pfilename ] [ -tn ] key...

       It is possible to have whitespace between a command line option and its parameter.

DESCRIPTION

       lkbib  searches bibliographic databases for references that contain the keys key... and prints any references found on the standard output.
       lkbib will search any databases given by -p options, and then a default database.  The default database is taken from the REFER environment
       variable  if it is set, otherwise it is /usr/dict/papers/Ind.  For each database filename to be searched, if an index filename.i created by
       indxbib(1) exists, then it will be searched instead; each index can cover multiple databases.

OPTIONS

       -v     Print the version number.

       -pfilename
	      Search filename.	Multiple -p options can be used.

       -istring
	      When searching files for which no index exists, ignore the contents of fields whose names are in string.

       -tn    Only require the first n characters of keys to be given.	Initially n is 6.

ENVIRONMENT

       REFER  Default database.

FILES

       /usr/dict/papers/Ind  Default database to be used if the REFER environment variable is not set.

       filename.i	     Index files.

SEE ALSO

       refer(1), lookbib(1), indxbib(1)

Groff Version 1.19.2						 24 November 2004							  LKBIB(1)
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