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Field has no value | Access World Forums The error is triggered when an expression tries to access a value that doesn't exist, such as a blank or null field A common scenario is using Nz (txtApproval, "") where txtApproval is empty or not yet initialized
Require a value in a field - Microsoft Support There are two basic ways that you can require a value in a field in an Access table: Set the field's Required property to Yes You can do this by opening the table in Design view This method is easy and a good choice if you only want to change one field one time
Make MS Access number field show null not 0 - Stack Overflow Leave the Default Value property blank Then, run an update query to nullify all rows that currently show zero for your column You can set almost all (number) fields to be NULL by default You can set that in the table and in the form
10 tricks for handling null values in Microsoft Access Null values indicate that data is missing or unknown, and if you don't take steps to handle them, you could wind up with runtime errors or erroneous data These Access pointers will help you
Microsoft Access tips: Nothing? Empty? Missing? Null? Null is a term used in all databases; it is the value of a field when you have not entered Think of it as meaning 'unknown ' Another article deals with the common errors with Null The text below will make most sense if you try the examples (right) as you go Nothing is the uninitialized state of an object variable