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.
Teradata. A multidimensional database (MDB) is a type of database that is optimized for data warehouse and online analytical processing (OLAP) applications. Multidimensional databases are frequently created using input from existing relational database s.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.
Correlated subquery. In a SQL database query, a correlated subquery (also known as a synchronized subquery) is a subquery (a query nested inside another query) that uses values from the outer query. Because the subquery may be evaluated once for each row processed by the outer query, it can be inefficient.