How to set verification rules in access

Set validation rules in Microsoft Access: Right-click on the field to be validated, select "Properties", and select the "Validation Rules" tab in the "Field Properties" dialog box. Enter an expression in the Validation Rule box to specify the allowed input types. For example, make sure a numeric field only accepts numbers: IsNumeric([field name]). Enter the error message if the rule is violated in the Validation message box. Select the Enforce validation rules checkbox to prevent users from saving records that contain invalid data, and select the Show validation message checkbox to display an error message. Click OK to save changes. Access applies validation rules and displays error messages as appropriate.

How to set Access validation rules

In a Microsoft Access database, validation rules can be used to restrict what users enter type and ensure data accuracy. Here's how to set up a validation rule:

Step 1: Create a validation rule

1. Right-click the field you want to validate and select Properties.
2. In the Field Properties dialog box, select the Validation Rules tab.
3. In the Validation Rule box, enter an expression. As shown below:

• Numeric field: IsNumeric([field name])
• Text field: Not IsNull( [Field name]) And Len([Field name]) <= 50
• Date field: IsDate([Field name])

• Custom rules: Use the following format: [Condition], [Error message]

  • For example: Like "A*", "Value must start with A"

Step 2: Set the validation message

In the Validation Message box, enter the error message that is displayed to the user when validation rules are violated. For example: "Please enter a valid number".

Step 3: Apply Validation Rules

• Enforcement of Validation Rules:On the Validation Rules tab, select Enforce validation rules checkbox to prevent users from saving records if they enter invalid data.
• Display of verification messages: Select the "Show verification message" checkbox to display an error message to the user when verification rules are violated.

Step 4: Save changes

Click OK to close the Field Properties dialog box. Access applies validation rules and displays error messages as appropriate.

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