The design of an extensible system, called the object shell, to define and query an object-oriented view of an existing database is described. An object-oriented view is defined by identifying the object types and the functions between them that are pres
This is the most common form of DBMS.Invented by E.F. Codd, the only way to view the data is as a set of tables. Because there can berelationships between the tables, people often assume that is what the word"relational" means. Not so.Codd was a mathematician and the word "...