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You can use an expression to perform calculations, manipulate characters, or test data. For example, an expression can check for one of a series of values, such as "Tokyo" Or "Moscow" Or "Paris" Or "Helsinki".Expressions can also perform mathematical operations. For example, the expression You can add a field validation rule and/or a record validation rule.When you define rules for tables, those rules apply when you import data.To add validation rules to a table, you open the table and use commands on the Fields tab of the ribbon.Easy enough to add a Validation rule on the Denied control button of: is Null Or Empty(Reasonfor Denial) Here comes the problem, there are two tabs/panels that this validation rule need to run on.The other rule I have for the Final Denial is: is Null Or Empty(Reasonfor Final Denial) The problem comes in where when the form is being filled out by the end user, and the first denialhappens, the user enters in comments and clicks on the DENIED button, however,it doesn't close the form.
A record validation rule checks input to one or more fields is applied when the focus leaves the record.This is the same as setting the Required field property to Yes.However, when you enable the Required property and a user fails to enter a value, Access displays a somewhat unfriendly error message.Keep in mind that Access supports two sets of wildcard characters: ANSI-89 and ANSI-92.
Each of those standards uses a different set of wildcard characters.Validation text lets you provide a message to help users who input data that is not valid.