With Microsoft Analysis Services connections, drill-down actions defined in the cube are not available in Tableau.Ĭube data sources do not accept actions from relational or other cube data sources.įor example, suppose you have a workbook with a view that uses a MySQL data source, a second view that uses cube data source A, and a third view that uses cube data source B. The following table details the differences. When you use a cube data source, not all Tableau features work the same as with relational data sources, or are even available. Tableau features that are affected when you use a cube data source
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For details, see How to Create a Calculated Member. A calculated member can be either a calculated measure, which is a new field in the data source just like a calculated field, or a calculated dimension member, which is a new member within an existing hierarchy. With MDX calculated members, you can create more complex calculations and reference both measures and dimensions. MDX, which stands for Multidimensional Expressions, is a query language for OLAP databases. When working with a cube data source, you can create calculated members using MDX formulas instead of creating Tableau formulas. Create calculated members using MDX formulas Use your (Link opens in a new window) account to sign in.
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Watch a video: To see related concepts demonstrated in Tableau, watch Analysis with Cubes and MDX (Link opens in a new window), a 5-minute free training video. The cube data sources supported in Tableau are Thus, cube data sources are not as flexible as relational data sources if the types of questions you need to ask were not anticipated by the original designer, or if they change after the cube was built. These definitions remain static until the cube is rebuilt.
However, the reason for a cube's speed is that all its aggregations and hierarchies are pre-built. What are cube data sources?Ī cube data source is a data source in which hierarchies and aggregations have been created by the cube's designer in advance.Ĭubes are very powerful and can return information very quickly, often much more quickly than a relational data source. Note: Cube data sources are supported only for Tableau Desktop on Windows-not for the Mac. Talk to your database administrator to find out if this is an option. In many cases there are alternative approaches that you can use to compensate for the unavailability of these features with cube data sources, but you may also have the option to connect directly to a relational database that was used as the source for a cube data source.
This topic describes these differences, and also identifies some Tableau features that are not available when you connect to a cube data source. Cube data sources (also known as multidimensional or OLAP data sources) have certain characteristics that differentiate them from relational data sources when you work with them in Tableau.
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