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Full Discussion: Merging two files based on matching columns
Top Forums UNIX for Dummies Questions & Answers Merging two files based on matching columns Post 302948171 by Prathmesh on Friday 26th of June 2015 11:39:07 AM
Old 06-26-2015
Thanks Scrutinizer, Don Cragun and RudiC.

I am getting desired output.
Code:
$ awk 'NR==FNR{A[$2]=$1; B[$2]=$3; next} {$3=A[$1]; $4=B[$1]}1' FS=, OFS=, Test2.txt Test1.txt
Amar,Movies,,
Sanjay,Cricket,,
Rakesh,Football,3,Police
Samit,Cricket,1,Service
Sam,Songs,2,DJ
Ram,Books,,

As suggested by RudiC, I have used FILENAME variable which helped me to understand how awk works.
Code:
$ awk 'NR==FNR{A[$2]=$1; B[$2]=$3; print FILENAME,$1,$2,$3,A[$2],B[$2]; next} {$3=A[$1];$4=B[$1];print FILENAME,$1,A[$1],B[$1]}' FS=, OFS=, Test2.txt Test1.txt
Test2.txt,1,Samit,Service,1,Service
Test2.txt,2,Sam,DJ,2,DJ
Test2.txt,3,Rakesh,Police,3,Police
Test1.txt,Amar,,
Test1.txt,Sanjay,,
Test1.txt,Rakesh,3,Police
Test1.txt,Samit,1,Service
Test1.txt,Sam,2,DJ
Test1.txt,Ram,,

Thanks a lot for your help.
 

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LEARN ABOUT CENTOS

gensprep

gensprep(8)							 ICU 50.1.2 Manual						       gensprep(8)

NAME

       gensprep - compile StringPrep data from files filtered by filterRFC3454.pl

SYNOPSIS

       gensprep [ -h, -?, --help ] [ -v, --verbose ] [ -c, --copyright ] [ -s, --sourcedir source ] [ -d, --destdir destination ]

DESCRIPTION

       gensprep reads filtered RFC 3454 files and compiles their information into a binary form.  The resulting file, <name>.icu, can then be read
       directly by ICU, or used by pkgdata(8) for incorporation into a larger archive or library.

       The files read by gensprep are described in the FILES section.

OPTIONS

       -h, -?, --help
	      Print help about usage and exit.

       -v, --verbose
	      Display extra informative messages during execution.

       -c, --copyright
	      Include a copyright notice into the binary data.

       -s, --sourcedir source
	      Set the source directory to source.  The default source directory is specified by the environment variable ICU_DATA.

       -d, --destdir destination
	      Set the destination directory to destination.  The default destination directory is specified by the environment variable ICU_DATA.

ENVIRONMENT

       ICU_DATA  Specifies the directory containing ICU data. Defaults to /usr/share/icu/50.1.2/.  Some tools in ICU depend on the presence of the
		 trailing slash. It is thus important to make sure that it is present if ICU_DATA is set.

FILES

       The  following files are read by gensprep and are looked for in the source /misc for rfc3454_*.txt files and in source /unidata for Normal-
       izationCorrections.txt.

       rfc3453_A_1.txt	   Contains the list of unassigned codepoints in Unicode version 3.2.0....

       rfc3454_B_1.txt	   Contains the list of code points that are commonly mapped to nothing....

       rfc3454_B_2.txt	   Contains the list of mappings for casefolding of  code points when Normalization form NFKC is specified....

       rfc3454_C_X.txt	   Contains the list of code points that are prohibited for IDNA.

       NormalizationCorrections.txt
			   Contains the list of code points whose normalization has changed since Unicode Version 3.2.0.

VERSION

       50.1.2

COPYRIGHT

       Copyright (C) 2000-2002 IBM, Inc. and others.

SEE ALSO

       pkgdata(8)

ICU MANPAGE
							   18 March 2003						       gensprep(8)
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