I have a table where two columns have values. I want to insert a third column so that each time I enter values in these columns, the sum will appear in the third column.
Novice
Windows XP 
Access 2002 (version 10.0)
I have a table where two columns have values. I want to insert a third column so that each time I enter values in these columns, the sum will appear in the third column.
Administrator
Windows 10 Access 2013 32bit
Do that with a query and not with a field in the table.
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