Access: Sum Function

In Access, the Sum function returns the sum of a set of numeric values in a select query.

The syntax for the Sum function is:

Sum ( expression )

expression is a numeric value.It can be a field or a formula that evaluates to a numeric expression.

SQL/Queries

You can use the Sum function in a query by clicking on the Totals button in the toolbar (This is the button with the summation symbol). The Sum function is used in conjunction with the Group By clause.

This query would return the sum of all UnitsInStock by ProductName.