I am using the standard join command to join two sorted files based on column1.
The command is simple join file1 file2 > output_file.
But how do I join 3 or more files using the same technique ?
join file1 file2 file3 > output_file
Above command gave me an empty file.
I think sed can help me but I am not too sure how ?
NAME join - join lines of two files on a common field SYNOPSIS join [OPTION]... FILE1 FILE2
it only works with two files.
if you need to join three, maybe you can first join the first two, then join the third.
join file1 file2 | join - file3 > output
that should join the three files without creating an intermediate temp file.
- tells the join command to read the first input stream from