totn Access Functions

MS Access: IsNull Function

This MSAccess tutorial explains how to use the Access IsNull function with syntax and examples.

Description

The Microsoft Access IsNull function returns TRUE if the expression is a null value. Otherwise, it returns FALSE.

Syntax

The syntax for the IsNull function in MS Access is:

IsNull ( expression )

Parameters or Arguments

expression
A variant that contains a string or numeric value.

Returns

The IsNull function returns TRUE if the expression is a null value.
The IsNull function returns FALSE if the expression is not a null value.

Applies To

The IsNull function can be used in the following versions of Microsoft Access:

  • Access 2019, Access 2016, Access 2013, Access 2010, Access 2007, Access 2003, Access XP, Access 2000

Example

Let's look at how to use the IsNull function in MS Access:

IsNull (null)
Result: TRUE

IsNull ("Tech on the Net")
Result: FALSE

Example in VBA Code

The IsNull function can be used in VBA code in Microsoft Access.

For example:

Dim LValue As Boolean

LValue = IsNull("Tech on the Net")

In this example, the variable called LValue would contain FALSE as a value.

Example in SQL/Queries

You can also use the IsNull function in a query in Microsoft Access.

For example:

Microsoft Access

In this query, we have used the IsNull function as follows:

Expr1: IsNull([Description])

This query will evaluate whether the Description field contains a null value and display the results in a column called Expr1. You can replace Expr1 with a column name that is more meaningful.

For example:

NullDescription: IsNull([Description])

The results would now be displayed in a column called NullDescription.

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