I have a table (tblInvoices) that has three (relevant) fields:
Some of the invoice amounts are positive and some are negative.
I'm looking for a query that will show all the accounts that have both positive and negative invoice amounts (i.e. an account that has at least one invoice that is positive and at least one invoice that is negative).
It doesn't matter to me if the query results show just one line for each matching AccountNumber of if the query results show all the invoices for each matching AccountNumber.
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The Relationships Diagram is a good way to get an overall view of what a database is keeping track of. It is also where relationships are defined. A relationship specifies how two tables connect to each other.
As you build tables in Microsoft Ac…