I have an openoffice calc spreadsheet with 2 columns and 7000+ lines Each line contains a product id in the first column and a colour in the second column. I need 1 line only for each product id. To achieve this the second column should contain a list of the colours, with each colour seperated by a colon. Example id colour 42 white 42 black 52 green 52 red 52 orange Required example 42 white:black 52 green:red:orange
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