
My data look like this:
Col1
1
2
3
4
5
6
.......

My questions are:
(1) How do I get it in the following format?
Col1 Col2
1    2
3    4
5    6
.......

(2) How do I transform the data in 2 column format above back to the single column format?

Thanks in advance for your reply!


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