< (Less Than) (MDX)
Performs a comparison operation that determines whether the value of one Multidimensional Expressions (MDX) expression is less than the value of another MDX expression.
Syntax
MDX_Expression<MDX_Expression
Parameters
- MDX_Expression
A valid MDX expression. 
Return Value
A Boolean value based on the following conditions:
true if both parameters are non-null, and the first parameter has a value that is lower than the value of the second parameter.
false if both parameters are non-null, and the first parameter has a value that is either equal to or greater than the value of the second parameter.
null if either or both parameters evaluate to a null value.
Examples
The following example demonstrates the use of this operator.
-- This query returns the gross profit margin (GPM)
-- for clothing sales where the GPM is less than 30%.
With Member [Measures].[LowGPM] as
  IIF(
      [Measures].[Gross Profit Margin] < .3,
      [Measures].[Gross Profit Margin],
      null)
SELECT NON EMPTY
    [Sales Territory].[Sales Territory Country].Members ON 0,
    [Product].[Category].[Clothing] ON 1
FROM
    [Adventure Works]
WHERE
    ([Measures].[LowGPM])