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I have a file. It contains an account-ID, an invoice number, an invoice
date, a part number, and a quantity shipped.
And it has multiple examples in which a given combination of account-ID,
invoice number, invoice date, and part number yield multiple records
(don't ask; I'm not the one populating it).
I'd like to (1) count the unique combinations of account-ID, invoice
number, invoice date, and part number, and (2) produce a result set in
which each unique combination has the sum of the quantity shipped values
for all records matching that combination, and pour that result set into
a file.
Given my limited knowledge of SQL, and that most online SQL resources
assume either MySQL or some M$-proprietary database, rather than
DB2/400, I'm not sure how I would do that.
--
JHHL
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