How to set verification rules and verification text in access

Validation rules are expressions used to verify input data, and verification text is the prompt message displayed when the input value does not meet the verification rules. Setting validation rules involves entering expressions in the "Validation Rules" tab, while setting validation text requires entering prompt information in the "Validation Text" tab. Example: To verify that the value entered in the date of birth field is a valid date, set the validation rule to "=DateValue([date of birth])

Set validation rules and validation text in Access

1. Validation rules

A validation rule is an expression used to verify whether the input data meets specific criteria. For example, to ensure that only numbers can be entered into a field, you can set a validation rule as: "IsNumeric([field name])".

Steps to set validation rules:

• Select the field for which you want to set validation rules.
• In the "Validation Rules" tab of the "Field Properties" pane, enter the expression.
• Click the "Verification Text" tab to enter the prompt message when verification fails.

2. Verification text

The verification text is the prompt message displayed when the entered value does not meet the verification rules. This helps the user understand the cause of the input error and correct the input.

Steps to set the verification text:

• In the "Validation Text" tab of the "Field Properties" pane, enter the prompt information.
• Make sure the validation rules have been set in the "Validation Rules" tab.

Example:

To set up a validation rule and validation text that ensures the value entered in the Date of Birth field is a valid date, follow these steps:

Validation rules:

<code>=DateValue([出生日期])</code>

Validation text:

<code>请输入有效的出生日期。</code>

In this way, if the birth date entered by the user is greater than the current date, it will A prompt message appears prompting the user to enter a valid date of birth.

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