Database Systems - (Query) I have duplicate invoices and I need to combine the customer balances. How do I write the equation?
1
Expert's answer
2017-11-18T12:33:06-0500
There is a code, which delete duplicate invoices and combine all clear invoices :
delete test_outer.* from test as test_outer where exists( select * from test as test_inner where test_inner.invoice = test_outer.invoice group by invoice having count(*) > 1 and min(test_inner.id) <> test_outer.id );
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