How to set the validation rule property in Access so that it cannot be null? Select the field, right-click and select Properties. In the Validation Rules tab, enter the validation rule: Is not Null. In Validation message, enter the error message you want to display. Click OK to save changes. Attempt to enter a null value and a verification message will be displayed.
How to set the validation rule property in Access and cannot be empty
Step 1: Select the Set fields for validation rules
In the Access table design view, select the fields for which you want to set validation rules.
Step 2: Open the Field Properties dialog box
- Right-click the field and select Properties.
- Alternatively, on the Fields tab, in the View group, click Property Table.
Step 3: Set Validation Rules
On the Validation Rules tab of the Field Properties dialog box, enter the following validation rules:
<code>Is not Null</code>
Step 4: Set Validation Message
In the Validation Message field, enter the message you want to display when a null value is entered. For example:
<code>字段不可为空。</code>
Step 5: Click OK
Click OK to save changes and close the Field Properties dialog box.
Step 6: Test the validation rules
Attempt to enter NULL values in the table for the affected fields. If you enter a null value, you will see the validation message you set.
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