Distinct (MDX)

THIS TOPIC APPLIES TO:yesSQL Server (starting with 2008)noAzure SQL DatabasenoAzure SQL Data Warehouse noParallel Data Warehouse

Evaluates a specified set, removes duplicate tuples from the set, and returns the resulting set.

Syntax


Distinct(Set_Expression)  

Arguments

Set_Expression
A valid Multidimensional Expressions (MDX) expression that returns a set.

Remarks

If the Distinct function finds duplicate tuples in the specified set, the function keeps only the first instance of the duplicate tuple while leaving the order of the set intact.

Examples

The following example query shows how to use the Distinct function with a named set, as well as how to use it with the Count function to find the number of distinct tuples in a set:

WITH SET MySet AS

{[Customer].[Customer Geography].[Country].&[Australia],[Customer].[Customer Geography].[Country].&[Australia],

[Customer].[Customer Geography].[Country].&[Canada],[Customer].[Customer Geography].[Country].&[France],

[Customer].[Customer Geography].[Country].&[United Kingdom],[Customer].[Customer Geography].[Country].&[United Kingdom]}

MEMBER MEASURES.SETCOUNT AS

COUNT(MySet)

MEMBER MEASURES.SETDISTINCTCOUNT AS

COUNT(DISTINCT(MySet))

SELECT {MEASURES.SETCOUNT, MEASURES.SETDISTINCTCOUNT} ON 0,

DISTINCT(MySet) ON 1

FROM [Adventure Works]

See Also

MDX Function Reference (MDX)