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Level Expressions

This section describes how to create and use level expressions in InterSystems MDX.

Details

In InterSystems MDX, a level expression has one of the following forms:

  • A level literal, which is a direct reference to the level as follows:

    [dimension_name].[hierarchy_name].[level_name]
    

    Where:

    • [dimension_name] is an MDX identifier that names a dimension.

    • [hierarchy_name] is an MDX identifier that names a hierarchy within that dimension. You can omit the hierarchy name. If you do, the query uses the first level with the given name, as defined in this dimension.

    • [level_name] is an MDX identifier that names a level within that hierarchy.

    For example:

    [gend].[h1].[gender]
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  • An expression that uses an InterSystems MDX extension to refer to a level in another cube, via the following syntax:

    [relationship_name].level_expression
    

    Where relationship_name is the name of a relationship in the cube used by the query and level_expression refers to a level contained in that relationship.

Uses

You can use level expressions as arguments to the following MDX functions: