Merge two files in new file as columns

[spiros]

For example I have one file which is

A
B
C
D

And another which has

1
2
3
4

The output would be (separated by tab instead of space)

A 1
B 2
C 3
D 4

I can do it with not very big files by creating new column and pasting but if it the files have millions of lines it can be more complex.

[Yutaka Emura]

Hello,

Are you using the Join CSV command with the Simply Merge (no keys) condition?

[spiros]

Oh thanks! That did it. 40 million lines in 4 minutes!

[Author]

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