I have reviewed the Loop articles and I successfully created a custom transformer to loop and create additional group sets of data (basically I had 462 records that I needed to replicate 66 times). I now need to add an account number to each 462 group set. There is no like attribute to merge with. I can't think through how to perform this? A push would be greatly appreciated.
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Why not just use a cloner? Then you can use the _copynum attribute for any group-by.