A database based on a relational model. A relational database allows the definition of data structures, storage and retrieval operations and constraints. In such a database the data are organised in tables.
Relational Data Base Management Systems (RDBMS) are database management systems that maintain data records and indices in tables. The row in the table relates to records of information and the columns equate to the fields or attributes of the data record. Relationships may be created and maintained across and among the data in the tables.
An RDBMS is a program that lets you create, update, and administer a relational database. An RDBMS takes Structured Query Language (SQL) statements entered by a user or contained in an application program and creates, updates, or provides access to the database.
relational data base management system. a broad category of DBMS that supports multiple interrelated tables containing different kinds of information, as opposed to more restrictive designs that handle only one type of table at a time, or other entirely different organizations of information that don't rely on tables. The use of relational databases is now so widely preferred that the term DBMS is generally equated to RDBMS. By far the most popular language for programming relational databases is SQL.