I need some help with a query to sum data for each id and write it into a
new table.
I have a source data table for each calendar month containing i.d.'s (not
unique) and a value and I need to sum all the values for each i.d. for all
months into a new table (where each i.d. will now be unique).
The only way I could see of doing it was in two or more stages?
Duncan
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