I'm looking to take the first row of each group in a table and create an additional row that has the value from the first column (prod) in the second column (comp). Basically, this is an unbundling of a product, where a product ID has components attached to it, but the actual product ID itself should also be considered part of the bundle (one of the components) when joining to other tables. Have: Prod Comp x 1 x 2 x 3 y 1 y 2 Want: Prod Comp x x x 1 x 2 x 3 y y y 1 y 2
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