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Hi...first time poster so be gentle :cool: I have a table in the following format: Code1 Code2 Reserve 1 5 678 1 9 23 ...... Code1 takes values from 1 to 945 and Code2 takes values from 1 to 3000 (the table has 945*3,000=2,835,000 lines) I need to summarise by Code1 for the average of...