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Hi everyone hope you're doing well

I'm using Aggregate function to aggregate the value of my measure for two specific years as you can see below :

select aggregate ({[DimTime].[Year].&[1396] ,[DimTime].[Year].&[1397] },[Measures].[IndentCount]) on 0 from [Procurement]

according to the fact that aggregate function accepts two parameters : Aggregate (Set_expression , Numeric_Expression) What is wrong with my MDX query?

I get this error : The Axis0 function expects a tuple set expression for the argument. A string or numeric expression was used.

Thanks in advance

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Look again at the details for the Aggregate() function. You got the parameters correct, but you need to look at what the function will return. It returns a numeric value.

So your MDX evaluates as SELECT some-numeric-value ON 0 FROM [Cube] which is not valid.

You need SELECT some-sort-of-set ON 0 FROM [Cube]

Try googling for examples of using this function (or see link above, which includes examples) to see how it can be used.

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