An Object-Oriented Database Management System (OODBMS), sometimes referred as Object Database Management System (ODMS) is a Database Management System (DBMS) that supports modeling and creation of data as objects. OODBMS provides support for object classes, class property and method inheritance by sub classes and their objects. A Relational Database Management System (RDBMS) is also a DBMS but, that is based on the relational model. Most popular DBMSs currently in use are RDMSs. As mentioned earlier RDBMS is based on the relational model and data in a RDMS are stored in the form of related tables. So, a relational database can simply be seen as a collection of one or more relations or tables with columns and rows. Each column corresponds to an attribute of the relation and each row corresponds to a record that consists of data values for an entity. RDMSs are developed by extending hierarchical and the network models, which were two previous database systems. Main elements of a RD...
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