It's important to understand the structure of the data in the cubes such as those in RDBMS tables. You can easily access the data from BI Administration Tool.
When you right-click on the cube, you'll see View Members. A new window pops up that will display the number of members. Also you're going to see the distinct values. This result set is accessed from the multidimensional source.
BI Server generates an MDX query so that it displays the number of attribute values. MDX and SQL languages are used to query databases. SQL statements are used to construct a relational view. MDX generates multidimensional views that consist of multiple-dimension attributes in the result set. While the SQL statements use tables as sources, MDX uses Cubes. The structure of the MDX statement is composed of the following clauses: