I have 4 very long columns that I need to merge. There is no row that has a value in any two columns. How do I get all the values in Columns B, C, and D into Column A without eliminating any of the values that are already in Column A.
Example:
A B C D
1 77
2 45
3 r5
4 h4
5 GG
6 8
7 16
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