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Top Forums Shell Programming and Scripting Compare 2 csv files by columns, then extract certain columns of matcing rows Post 302904233 by bkane3 on Tuesday 3rd of June 2014 04:19:56 AM
Old 06-03-2014
Thank you Akshay. That worked.

I have another similar matching problem. I want to compare the previous outputted result file (I will call it file3) with file4 (below) by 'offer','category','brand', 'company'. Like before, I want to extract exact matching rows' remaining columns ('quantity', 'offervalue') from file4 and add them to file3 columns, and remove no match rows from file3.

Code:
$ head file4
offer,category,quantity,company,offervalue,brand
1190530,9115,1,108500080,5,93904
1194044,9909,1,107127979,1,6732
1197502,3203,1,106414464,0.75,13474
1198271,5558,1,107120272,1.5,5072
1198272,5558,1,107120272,1.5,5072
1198273,5558,1,107120272,1.5,5072
1198274,5558,1,107120272,1.5,5072
1198275,5558,1,107120272,1.5,5072
1199256,4401,1,105100050,2,13791

Thanks
 

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BRAND.4TH(8)						    BSD System Manager's Manual 					      BRAND.4TH(8)

NAME
brand.4th -- FreeBSD ASCII art boot module DESCRIPTION
The file that goes by the name of brand.4th is a set of commands designed to draw the ASCII art BSD brand above the boot loader menu. The commands of brand.4th by themselves are not enough for most uses. Please refer to the examples below for the most common situations, and to loader(8) for additional commands. Before using any of the commands provided in brand.4th, it must be included through the command: include brand.4th This line is present in the default /boot/menu.rc file, so it is not needed (and should not be re-issued) in a normal setup. The commands provided by it are: draw-brand Draws the BSD brand. The brand that is drawn is configured by setting the loader_brand variable in loader.conf(5) to one of ``fbsd'' (the default) or ``none''. The position of the logo can be configured by setting the loader_brand_x and loader_brand_y variables in loader.conf(5). The default values are 2 (x) and 1 (y). The environment variables that effect its behavior are: loader_brand Selects the desired brand in the beastie boot menu. Possible values are: ``fbsd'' (default) or ``none''. loader_brand_x Sets the desired column position of the brand. Default is 2. loader_brand_y Sets the desired row position of the brand. Default is 1. FILES
/boot/loader The loader(8). /boot/brand.4th brand.4th itself. /boot/loader.rc loader(8) bootstrapping script. EXAMPLES
Set FreeBSD brand in loader.conf(5): loader_brand="fbsd" SEE ALSO
loader.conf(5), loader(8) HISTORY
The brand.4th set of commands first appeared in FreeBSD 9.0. AUTHORS
The brand.4th set of commands was written by Devin Teske <dteske@FreeBSD.org>. BSD
May 18, 2011 BSD
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