Database History. 1960s Legacy Systems: Hierarchical and Network DBMS 1970s Relational DBMS 1980s Non conventional DBMS. Non conventional DBMS (OO, Object Relational, Deductive, etc.) .
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Relational Database works well to store just text and numbers as long as there are not many multi-valued attributes.
Easy query language
Classes and Objects
Properties and Methods
Events and Messages
Multiple Inheritance and PolymorphismDBMS + OO
Informix Universal Server (many OO features)
MS-Access (very limited, picture field)
Datalog (combines PROLOG + Database technology).