I'd like to know, how it's possible to concatenate one column and mantain the information in each row. For example: A B a 1 a 2 a 3 b 4 b 5 b 6 c 7 d 8 e 9 e 10 f 11 Create 3 columns like this: A B Concatenate a 1 1,2,3 a 2 1,2,3 a 3 1,2,3 b 4 4,5,6 b 5 4,5,6 b 6 4,5,6 Thanks in advance for your help!!
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