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Top Forums UNIX for Dummies Questions & Answers Merging two files based on matching columns Post 302948079 by Prathmesh on Thursday 25th of June 2015 01:28:01 PM
Old 06-25-2015
Merging two files based on matching columns

Hi,

I am facing issues while accomplishing below task.

We have two files Test1.txt and Test2.txt. We have to match 1st column of Test1.txt file with 2nd column of Test2.txt and then merge 2nd file with the 1st file. In the output we should select column 1 and 2 from the 1st file and column 1 and 3 from the 2nd file. If there is no match with the 1st file then blank should be appended in output.
Code:
$ cat Test1.txt
Amar,Movies,12
Sanjay,Cricket,18
Rakesh,Football,35
Samit,Cricket,56
Sam,Songs,20
Ram,Books,40
$

Code:
$ cat Test2.txt
1,Samit,Service
2,Sam,DJ
3,Rakesh,Police
$

Desired Output:
Code:
Amar,Movies,,
Sanjay,Cricket,,
Rakesh,Football,3,Police
Samit,Cricket,1,Service
Sam,Songs,2,DJ
Ram,Books,,

I have tried to do this with awk but, could not get it.

Also, please advise how can we represent individual fields from two files?
For example, if I pass two files (Test1.txt and Test2.txt) to awk then, how will I differentiate or represent 1st/2nd field of the Test1.txt and 1st/2nd field of the Test2.txt?

Thanks in advance for your help in this regards.
 

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PESCETTI(1)						      General Commands Manual						       PESCETTI(1)

NAME
pescetti -- Pseudo-Duplimate Generator SYNOPSIS
pescetti DESCRIPTION
This manual page documents briefly the pescetti command. OPTIONS
Here are a list of the available options and what they do. You must specify exactly one from --demo, --generate or --load. --help Prints the help text --demo Demonstration mode. Generates one hand with permutations and the tutorial for how to use them. --generate=N Generate N random boards --load=boards.txt Load boards+analysis from boards.txt --load-dds=boards.dds Load boards from boards.dds in dds format --load-analysis=tricks.txt Load analysis from tricks.txt --permutations=permutations.txt Generate the permutations and save them to the given file --curtains=curtains.txt Save curtain cards to file curtains.txt --save=boards.txt Save the boards+analysis to boards.txt --save-dds=boards.dds Save the boards to boards.dds in dds format --save-analysis=tricks.txt Save the analysis to tricks.txt --format=html|txt|pdf Set the output mode to the given format --title=title Set the title for the output --output=hands.txt Print the hands to hands.txt, rather than to standard output --stats Generate statistics about the set of boards; included in the hands output --analyze Run the dds analyzer on the boards and print the resulting numberof tricks (warning SLOW) --criteria= A list of criteria to apply to each generated hand to generate specific hand types. The list should be space separated and each item may be suffixed with a colon and a (fractional) probability value which can be used to weight the criteria. E.g. --criteria="weaknt:0.8 strongnt:0.5" Valid criteria are: unbalanced weaknt strongnt twont strongtwo weaktwo three twoclubs 4441 singlesuit twosuits partscore game slam game-invite slam-invite jumpshift jumpfit splinter bacon weird --probability=factor Generate hands matching the criteria with only the given probability. Factor is in the range 0 to 1. On each attempt to generate a board it is rejected if it doesn't match the criteria with the given probability. A factor of about 0.8 gives roughly half matching boards AUTHOR
This manual page was written by Matthew Johnson <debian@matthew.ath.cx>. Permission is granted to copy, distribute and/or modify this docu- ment under the terms of the GNU General Public License, Version 2 as published by the Free Software Foundation. On Debian systems, the complete text of the GNU General Public License can be found in /usr/share/common-licenses/GPL. PESCETTI(1)
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