How to Use the Nz Function in Microsoft Access on Windows 11

Posted on 20th June 2023

How to Use the Nz Function in Microsoft Access on Windows 11

The Nz function is a built-in function in Microsoft Access that is used to return a value you specify if a variant is Null (empty). If the variant is not Null, the Nz function returns the variant itself. The Nz function is useful for situations where you are working with data that may be missing or corrupt, and you want to substitute a value for the missing data.

For example, you may have a field in a table that contains a person’s middle initial. If the middle initial is not known, the field may contain a Null value. You can use the Nz function to substitute a string of characters, such as “N/A” for the Null value.

To use the Nz function in a query, you need to supply two arguments:

The variant that you want to test to see if it is Null
The value you want to return if the variant is Null

For example, the following query uses the Nz function to return the string “Unknown” if the value in the MiddleInitial field is Null:

SELECT LastName, FirstName, Nz(MiddleInitial, “Unknown”) AS MiddleName
FROM Employees;

If you run this query, you will see that the string “Unknown” is displayed in the MiddleName column for those records where the MiddleInitial field contains a Null value.

The Nz function is often used in conjunction with the IsNull function. The IsNull function is used to test whether a variant is Null. The following query uses both the IsNull and Nz functions:

SELECT LastName, FirstName, Nz(MiddleInitial, “Unknown”) AS MiddleName
FROM Employees
WHERE IsNull(MiddleInitial);

This query returns the same results as the previous query. However, the WHERE clause uses the IsNull function to test whether the MiddleInitial field is Null. Only those records where the MiddleInitial field is Null are included in the results.

The Nz function is a built-in function in Microsoft Access that is used to handle Null values. It is a common function that is used in conjunction with other functions, most notably the IsNull function.

Null values are a common problem when working with data in Microsoft Access. Null values indicate that data is missing or unknown. They can cause errors in calculations and make it difficult to work with data.

The Nz function can be used to convert Null values to zero values, which can make it easier to work with data. The Nz function can also be used to convert zero values to Null values.

The Nz function has two arguments, the value and the value to return if the value is Null. The value to return if the value is Null can be any value, including another Null value.

The syntax of the Nz function is:

Nz(value, value to return if value is Null)

The following example shows how to use the Nz function to convert a Null value to a zero value:

Dim myValue As Variant

myValue = Nz(SomeNullValue, 0)

In the example above, the Nz function is used to convert the value of SomeNullValue to a zero value if it is Null.

The following example shows how to use the Nz function to convert a zero value to a Null value:

Dim myValue As Variant

myValue = Nz(SomeZeroValue, Null)

In the example above, the Nz function is used to convert the value of SomeZeroValue to a Null value if it is zero.

The Nz function can be used in conjunction with other functions. The following example shows how to use the Nz function with the IsNull function:

Dim myValue As Variant

myValue = Nz(SomeNullValue, 0)

If IsNull(myValue) Then

‘Do something

End If

In the example above, the Nz function is used to convert the value of SomeNullValue to a zero value if it is Null. The IsNull function is then used to check if the value of myValue is Null.

The Nz function is a useful function for working with Null values in Microsoft Access. It can be used to convert Null values to zero values or vice versa. It can also be used in conjunction with other functions.

The article should start with the following:

The Nz function is a built-in function in Microsoft Access that allows you to handle Null values. Null values are values that are unknown or not applicable, and they can be a problem when you are trying to work with data in Access. The Nz function can be used to convert Null values to zero (0) or to a blank value. It can also be used to return a value from a list of values that is not Null.

The Nz function is a built-in function in Microsoft Access that allows you to handle Null values. Null values are values that are unknown or not applicable, and they can be a problem when you are trying to work with data in Access. The Nz function can be used to convert Null values to zero (0) or to a blank value. It can also be used to return a value from a list of values that is not Null.

If you have a field in a table that may contain Null values, you can use the Nz function to convert those Null values to another value that you specify. For example, you might have a field that contains the prices of products that your company sells. If a product is not currently for sale, you can enter a Null value in the field. However, when you try to calculate the average price of all products, the Null values will cause an error. You can use the Nz function to convert the Null values to zero (0), so that the calculation will not produce an error.

To use the Nz function, you must first specify the value that you want to check for Null values. This value can be a field name, a variable, or a literal value. You can then specify the value that you want to return if the specified value is Null. The following example shows how to use the Nz function to convert Null values in the Price field to zero:

AveragePrice: Nz(Avg([Price]),0)

In the example above, the Nz function will check the value in the Price field. If the value is Null, the function will return zero (0). If the value is not Null, the function will return the value of the Price field.

You can also use the Nz function to return a value from a list of values that is not Null. For example, you might have a field that contains a list of product names. If one of the products is not currently for sale, you can enter a Null value in the field. However, when you try to display a list of all products, the Null values will cause an error. You can use the Nz function to return the first non-Null value in the list, as shown in the following example:

ProductName: Nz([Product1],[Product2],[Product3])

In the example above, the Nz function will check the values in the Product1, Product2, and Product3 fields. If the value in the Product1 field is not Null, the function will return the value of the Product1 field. If the value in the Product1 field is Null, the function will return the value of the Product2 field. If the value in the Product2 field is Null, the function will return the value of the Product3 field.

You can also use the Nz function to return a blank value if the specified value is Null. To do this, you can use a pair of double quotation marks (“”) as the second argument of the Nz function, as shown in the following example:

ProductName: Nz([Name],””)

In the example above, the Nz function will check the value in the Name field. If the value is Null, the function will return a blank value. If the value is not Null, the function will return the value of the Name field.