Multidimensional Expressions Overview
Multidimensional OLE DB for OLAP provides a syntax called multidimensional expressions (MDX) to specify a dataset. MDX is a set of macros defined on top of SQL. These macros are generally useful for querying a multidimensional data source, and their precise semantics are defined by means of their structured query language mappings.
Multidimensional expressions are discussed in greater detail in Multidimensional Expressions. Relevant topics include the following: