Combines two CSV files merging identical columns

Example: combine two CSV files. Some columns are identical, some are different

a.csv

name,age,occupation
John,20,student
Mary,21,student

b.csv

name,age,occupation
John,20,teacher
Mary,21,doctor

Let us combine these two CSV files. Identical columns will be collapsed. Different values will have duplicate column

csv-pair a.csv b.csv combined.csv

combined.csv

name,age,occupation - a.csv,occupation - b.csv
John,20,student,teacher
Mary,21,student,doctor

Need NodeJS, you can check if Node is installed locally by opening a terminal window and trying command

node --version

Then install this application

sudo npm install -g csv-pair

Check if the tool has been installed by running from the terminal. It should show the input parameters

$ csv-pair
Usage: <filename1.csv> <filename2.csv> <output.csv>

Author: Gleb Bahmutov © 2015

• @bahmutov
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License: MIT - do anything with the code, but don't blame me if it does not work.

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Support: if you find any problems with this module, email / tweet / open issue on Github

Copyright (c) 2015 Gleb Bahmutov

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

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