Ok Monks, I'm finished beating my head against the desk and I need some guidance. I have one main file(main.csv), and I have a few other files(20090101.csv, 20090102.csv, and 20090103.csv). The main file looks something like this:

Number: 
10
4 
8

[download]
The other files look something like this: 
4, 523
10, 999
8, 0

[download]

So I guess step one I want to match the main.csv to the first file say 20090101.csv, and where the first number matches I want to add the second number to the main file. That part is easy, however when I compare the updated main file with the next file that's where my inexperience shows.

So long story short I want the main file to look something like: 
Number,20090101,20090102          ,20090103
10    ,999     ,"file 2's numbers","file 3's numbers"
4     ,523     ,"file 2's numbers","file 3's numbers"
8     ,0       ,"file 2's numbers","file 3's numbers"

[download]
All I'm really looking for is guidance but if you have something written already I will gladly take a look.

In reply to How to go about this? by meredib

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