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access functions

MS Access: DMax Function

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

Description

The Microsoft Access DMax function returns the maximum value from an Access table (or domain).

Syntax

The syntax for the DMax function in MS Access is:

DMax ( expression, domain, [criteria] )

Parameters or Arguments

expression is the field that you wish to find the maximum value for.

domain is the set of records. This can be a table or a query name.

criteria is optional. It is the WHERE clause to apply to the domain.

Applies To

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

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

Example

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

DMax("UnitPrice", "Order Details", "OrderID = 10248")

In this example, you would return the maximum UnitPrice from the Order Details table where the OrderID is 10248. This is the same as the following SQL statement:

SELECT Max([Order Details].UnitPrice) AS MaxOfUnitPrice
FROM [Order Details]
WHERE ((([Order Details].OrderID)=10248));

Example in VBA Code

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

For example:

Dim LMax As Currency

LMax = DMax("UnitPrice", "Order Details", "OrderID = 10248")

In this example, the variable called LMax would now contain the maximum UnitPrice from the Order Details table where the OrderID is 10248.

Example in SQL/Queries

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

For example:

Microsoft Access

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

Expr1: DMax("UnitPrice","Order Details","OrderID = 10248")

This query will return the maximum UnitPrice value from the Order Details table where the OrderID is equal to 10248. The results will be displayed in a column called Expr1. You can replace Expr1 with a column name that is more meaningful.

For example:

MaxValue: DMax("UnitPrice","Order Details","OrderID = 10248")

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

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