Have you tried writing any perl code yourself for this? Can you work out the code that would perform something like this step-wise method: 
get the list of file names
declare a hash for output
open the first file
while reading each line from the file
    get the first column of the line for use as a hash key
    assign the line as the value of hash element using that key

for each remaining file
    open the file
    while reading each line from the file
        get the first column of the line for use as a hash key
        append the line to the current value of the hash element using
+ that key

for each key in the hash
     print the value of the hash element using that key

[download]
See what you can do. If you have trouble, show us the code you tried, and we'll be able to help out with the details.

(I'm hoping I understood your task correctly -- if I didn't, please clarify.)

UPDATE: Actually, the method can be stated even more simply than what I showed above. In effect, you can leave out the part that handles the first file separately, and just do the "for" loop over all files in the list -- i.e. just treat all files in the list the same way.

In reply to Re: join mutiple files on first column by graff
in thread join mutiple files on first column by david_lyon

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