If you are building an Access form based on a query and notice you will need to add a calculated field, you don't need to redesign your query — just add the calculated field to your form. For example, say you are creating a form based on the Orders query, which consists of fields from the Orders and Order Details tables. You notice the query does not have a calculated field for the Total Purchase Price (Quantity*UnitPrice), which you want to appear on your form. Follow these steps to add a field for this calculation:
- Open the form based on the Orders query in Design Mode.
- Click the text box tool in the Database Toolbox.
- Click and drag in the form where you want to display the calculated field.
- Click and drag to select the Text Box Label and enter Total Purchase Price.
- Right-click the Unbound text box.
- Click Properties.
Under the Data
tab, click in the Control Source text box and enter the following formula:
As you enter orders into the form, the Total Purchase Price will display in the calculated field.
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