Merging two files into one based on the first column

Question

I have two files, both in the same format -- two columns both containing a number, for example:

file 1

1.00    99
2.00    343
3.00           


        

Answer 1

You can do it with Alacon - command-line utility for Alasql database.

It works with Node.js, so you need to install Node.js and then Alasql package:

To join two data from tab-separated files you can use the following command:

> node alacon "SELECT * INTO TSV("main.txt") FROM TSV('data1.txt') data1 
                   JOIN TSV('data2.txt') data2 USING [0]"

This is one very long line. In this example all files have data in "Sheet1" sheets.