Difference between RDBMS and OODBMS
RDBMS stands for Relational Database Management System. It is a database management system based on the relational model i.e. the data and relationships are represented by a collection of inter-related tables. It is a DBMS that enables the user to create, update, administer and interact with a relational database. RDBMS is the basis for SQL, and for all modern database systems like MS SQL Server, IBM DB2, Oracle, MySQL, and Microsoft Access.
OODBMS stands for Object-Oriented Database Management System. It is a DBMS where data is represented in the form of objects, as used in object-oriented programming. OODB implements object-oriented concepts such as classes of objects, object identity, polymorphism, encapsulation, and inheritance. An object-oriented database stores complex data as compared to relational database. Some examples of OODBMS are Versant Object Database, Objectivity/DB, ObjectStore, Caché and ZODB.
Difference Between RDBMS and OODBMS:
|Stands for Relational Database Management System.
|Stands for Object Oriented Database Management System.
|Way of storing data
|Stores data in Entities, defined as tables hold specific information.
|Stores data as Objects.
|Handles comparatively simpler data.
|Handles larger and complex data than RDBMS.
|Entity type refers to the collection of entity that share a common definition.
|Class describes a group of objects that have common relationships, behaviors, and also have similar properties.
|RDBMS stores only data.
|Stores data as well as methods to use it.
|Data Independence from application program.
|A Primary key distinctively identifies an object in a table..
|An object identifier (OID) is an unambiguous, long-term name for any type of object or entity.
|SQL (Structured Query Language)
|Object Query Language (OQL)
|RDBMS has Limited scalability due to rigid schema
|OODBMS has Highly scalable due to flexible schema
|RDBMS has Fine-grained locking
|OODBMS has Optimistic concurrency control
|In RDBMS Relational data is stored in tables and linked via foreign keys
|In OODBMS faster for complex object-oriented queries
|RDBMS is Efficient for complex queries involving multiple tables
|OODBMS is Faster for complex object-oriented queries
|RDBMS has Limited flexibility due to fixed schema
|OODBMS has highly flexible due to object-oriented nature
|In RDBMS Data is stored in tables on disk
|In OODBMS Data is stored in objects in memory or on disk
|MySQL, Oracle, SQL Server
|db4o, Versant, Objectivity/DB
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