Relational database management systems (RDBMS) rely on an optimizer (or relational optimizer) that transforms SQL statements into executable code. Before any SQL statement can be run by the RDBMS, the ...

The three-level database management system (DBMS) architecture splits databases into three distinct layers: An internal DBMS schema for low-level storage tasks. A conceptual DBMS schema for logical ...

The heart of any relational database management system is the system catalog that documents the database objects and system settings being used. The system catalog offers a wealth of information about ...