Align Numbers From 2 Columns In Parent Child Manner

I have searched numerous times for the answer I need, but no joy yet.

I have a spread sheet that has one column (call it 1) of data with a single entry each of 100, 200, 300, 400, 500, and so on.

I have a second column (call it 2) that has multiple entries of 100, 200, 300, 400, 500, and so on, and I want to sort so that the rows wind up with the numbers in column 1 all sorted in an accending order, but I want all the same numbers in column 2 sorted to "list" next to the same number before the next number sorts. See below for a small example of what I hope to see once it sorts.
100
100
100
100
200
200
200
200
300
300
300
300

Auto Merged Post Until 24 Hrs Passes;Unfortunately the example didn't post correctly..perhaps this will work but note that the x's are in column 1 and don't exist.

100
xxx100
xxx100
xxx100
200
xxx200
xxx200
xxx200
300
xxx300
xxx300
xxx300