Difference Between OODBMS and ORDBMS
Many different models exist in the field of database management which describes the way how data is to be stored and placed. Some of the models that can be compared easily are Object-Oriented Database Management Systems (OODBMS) and Object-Relational Database Management Systems (ORDBMS). It is important to understand the difference between these two to know how to use them appropriately for the right data-oriented applications. OODBMS includes object-oriented concepts with the database system itself, on the other hand, ORDBMS is an enhancement of the basic relational database system which provides object-oriented characteristics as well as maintains relational characteristics.
OODBMS
The object-oriented database system is an extension of an object-oriented programming language that includes DBMS functions such as persistent objects, integrity constraints, failure recovery, transaction management, and query processing. These systems feature object description language (ODL) for database structure creation and object query language (OQL) for database querying. Some examples of OODBMS are ObjectStore, Objectivity/DB, GemStone, db4o, Giga Base, and Zope object database.
Advantages of OODBMS
- Complex Data Representation: This is because, through OODBMS, hard dependencies can be well modeled to capture flexibility such as inheritance, encapsulation, and polymorphism.
- Direct Mapping: Here, objects of OODBMS match with the objects in programming languages, and so there is less difference between them, which is known as impedance.
- Reusability: Lectures such as inheritance make it possible to use existing code thereby shortening development time.
Disadvantages of OODBMS
- Complexity: The key working principle in an OODBMS is that the OODBMS is an implementation level of OOD, therefore, is more complex than traditional relational databases.
- Limited Query Support: OODBMS does not support queries such as SQL meaning there is little flexibility when it comes to querying.
- Lack of Standardization: OODBMS do not contain such standards as is the case with relational databases hence making the interfaces across different plates forms to be inconsistent.
ORDBMS
An object-relational database system is a relational database system that has been extended to incorporate object-oriented characteristics. Database schemas and the query language natively support objects, classes, and inheritance. Furthermore, it permits data model expansion with new data types and procedures, exactly like pure relational systems. Oracle, DB2, Informix, PostgreSQL (UC Berkeley research project), etc. are some of the ORDBMSs.
Advantages of ORDBMS
- SQL Support: While ORDBMS supports the structures of the SQL query language, they are quite flexible when tested against query language make it easier to handle complex queries unlike OODBMS.
- Scalability: It is easier and can accommodate large data sets as compared to OODBMS due to the fact that it retains the structure of relational databases.
- Interoperability: ORDBMS appears to offer better compatibility with the conventional RDMS thus making it easy to migrate from the conventional normal database to more OOD respectively.
Disadvantages of ORDBMS
- Complexity in Implementation: Although many object-oriented notions are supported by ORDBMS their representation using SQL can be problematic.
- Overhead: The combination in a hybrid approach causes a certain overhead which does have its influence in cases where only object-oriented or tabular representations are needed.
Difference Between OODBMS and ORDBMS
| OODBMS | ORDBMS |
|---|---|
| It stands for Object Oriented Database Management System. | It stands for Object Relational Database Management System. |
Object-oriented databases, like Object Oriented Programming, represent data in the form of objects and classes. | An object-relational database is one that is based on both the relational and object-oriented database models. |
| OODBMSs support ODL/OQL. | ORDBMS adds object-oriented functionalities to SQL. |
Every object-oriented system has a different set of constraints that it can accommodate. | Keys, entity integrity, and referential integrity are constraints of an object-oriented database. |
| The efficiency of query processing is low. | Processing of queries is quite effective. |
Conclusion
OODBMS and ORDBMS both are used for different requirements and applications are well suited for them. OODBMS is used for the system which needs objects to be mapped directly and when the structure of the data is complex. It is best for projects that require ORDBMS and benefits of relational databases but with little of OOP. Therefore, the choice between these two systems depends on certain aspects of the application, for example, need for query capabilities or object orientation.
