Bone metastasis happens in people who have cancer that forms in another part of the body. Cancer cells from that area break away and travel through the bloodstream and lymphatic system. When the cancer spreads to distant body organs, this is called metastasis.
A multidimensional database-or a multidimensional database management system (MDDBMS) - implies the ability to rapidly process the data in the database so that answers can be generated quickly. A number of vendors provide products that use multidimensional databases.Approaches to how data is stored and the user interface vary. Conceptually, a multidimensional database uses the idea of a data cube to represent the dimensions of data available to a user.For example, sales could be viewed in the dimensions of product model, geography, time, or some additional dimension.pproaches to how data is stored and the user interface vary. Conceptually, a multidimensional database uses the idea of a data cube to represent the dimensions of data available to a user.
The multidimensional data model is an integral part of On-Line Analytical Processing, or OLAP. Because OLAP is on-line, it must provide answers quickly; analysts pose iterative queries during interactive sessions, not in batch jobs that run overnight.And because OLAP is also analytic, the queries are complex..2 The Relational Implementation of the Model. The relational implementation of the multidimensional data model is typically a star schema, as shown in Figure 2-2, or a snowflake schema.