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MS Access: DMax Function
Learn how to use the Access DMax function with syntax and examples.
The Microsoft Access DMax function returns the maximum value from an Access table (or domain).
The syntax for the Microsoft Access DMax function 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.
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
Let's look at a simple example:
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.