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Top Forums Shell Programming and Scripting Linux - Join 2 csv files with common key Post 302965702 by RichZR on Tuesday 2nd of February 2016 08:40:56 AM
Old 02-02-2016
Linux - Join 2 csv files with common key

Hi,

I am trying to join 2 csv files, to create a 3rd output file with the joined data.

Below is an example of my Input Data:

Input File 1

Code:
NAME, FAV_FOOD, FAV_DRINK, ID, GENDER
Bob, Fish, Coke, 1, M
Lisa, Rice, Water, 2, F
Jenny, Noodle, Tea, 3, F
Ken, Pizza, Coffee, 4, M
Lisa, Cake, Milk, 2, F
Ken, Sandwich, Juice, 4, M

Input File 2

Code:
NAME, ID, AGE, COUNTRY
Lisa, 2, F, 22, UK 
Ken, 4, M, 12, Iceland
Jenny, 3, F, 18, France
Bob, 1, M, 31, Ireland

* The Keys to join are 'Name' and 'ID';
* The joined file should look like the below:

Output File

Code:
NAME, FAV_FOOD, FAV_DRINK, ID, GENDER, AGE, COUNTRY
Bob, Fish, Coke, 1, M, 31, Ireland
Lisa, Rice, Water, 2, F, 22, UK 
Jenny, Noodle, Tea, 3, F, 18, France
Ken, Pizza, Coffee, 4, M, 12, Iceland
Lisa, Cake, Milk, 2, F, 22, UK 
Ken, Sandwich, Juice, 4, M, 12, Iceland

Please could you suggest how I can perform this efficiently, as I will be joining large volumes of data from both files.

Many Thanks.

Last edited by RichZR; 02-02-2016 at 09:56 AM.. Reason: Amending Quotes to Code
 

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Text::CSV::Encoded::Coder::EncodeGuess(3pm)		User Contributed Perl Documentation	       Text::CSV::Encoded::Coder::EncodeGuess(3pm)

NAME
Text::CSV::Encoded::Coder::EncodeGuess - Text::CSV::Encoded coder class using Encode::Guess SYNOPSIS
use Text::CSV::Encoded coder_class => 'Text::CSV::Encoded::Coder::EncodeGuess'; use Spreadsheet::ParseExcel; my $csv = Text::CSV::Encoded->new(); $csv->encoding( ['ucs2', 'ascii'] ); # guessing ucs2 or ascii? $csv->encoding_to_combine('shiftjis'); my $excel = Spreadsheet::ParseExcel::Workbook->Parse( $file ); my $sheet = $excel->{Worksheet}->[0]; for my $row ( $sheet->{MinRow} .. $sheet->{MaxRow} ) { my @fields; for my $col ( $sheet->{MinCol} .. $sheet->{MaxCol} ) { my $cell = $sheet->{Cells}[$row][$col]; push @fields, $cell->{Val}; } $csv->combine( @fields ) or die; print $csv->string, " "; } DESCRIPTION
This module is inherited from Text::CSV::Encoded::Coder::Encode. USE
Except for 2 attributes, same as Text::CSV::Encoded::Coder::Encode. encoding_in $csv = $csv->encoding_in( $encoding_list_ref ); The accessor to an encoding for pre-parsing CSV strings. If no encoding is given, returns current $encoding, otherwise the object itself. $encoding_list_ref = $csv->encoding_in() When you pass a list reference, it might guess the encoding from the given list. $csv->encoding_in( ['shiftjis', 'euc-jp', 'iso-20022-jp'] ); If it cannot guess the encoding, the first encoding of the list is used. encoding $csv = $csv->encoding( $encoding_list_ref ); $encoding_list_ref = $csv->encoding(); You can pass a list reference to this attribute only: * For list data consumed by combine(). * For list reference returned by getline(). In other word, in "combine" and "print", it might guess an encoding for the passing list data. If it cannot guess the encoding, the first encoding of the list is used. SEE ALSO
Encode, Encode::Guess AUTHOR
Makamaka Hannyaharamitu, <makamaka[at]cpan.org> COPYRIGHT AND LICENSE
Copyright 2008-2010 by Makamaka Hannyaharamitu This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.14.2 2010-04-26 Text::CSV::Encoded::Coder::EncodeGuess(3pm)
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