Q. What are the benefits & limitations of the relational database model for business application today? Why is the object-oriented database model gaining acceptance for developing application and managing the hypermedia database at the business website?A. Relational Database Model is based on tables and for management purposes. This model was invented by Edgar F. Codd in 1969. Edgar at that time was working at IBM. In the relational model of a database, all data is represented in terms of “tuples” & grouped into “relations”. A database organized in terms of the relational model is a relational database.

S.no Name City State Rooms Front desk Restaurant Travel Desk Parking Room rate1 ABC A AA 12 Yes Yes Yes No 10002 XYZ S DD 23 Yes Yes Yes Yes 20003 AAA D SS 34 Yes Yes Yes Yes 12004 CCC F FF 43 Yes Yes Yes Yes 23005 BBB G GG 12 Yes No Yes Yes 30006 DDD H HH 32 Yes No No Yes 10007 FFF J JJ 45 No No No Yes 700From S.no to Room rates are attributesFrom 1 to 7 is Tuple

Benefits of Relation base model.Relational Database Model is widely used around the world, as its:1. Easy to use: In Relational model data is easily presented & visible. So revision becomes quite easy as the information is stored in simple tables & rows. Such data is attractive for the first time user.2. Flexibility: An operator or a user can easily link & extract the data & can get the desired information easily. 3. Precision: The usage of relational algebra and calculus in the manipulation of the relations between the tables ensures that there is no ambiguity (doubtfulness or uncertainty), which may otherwise come while establishing the links in a complicated network type database.

4. Security: Security control & authorization can be implemented on various tables, which give s a sense of control to the created of the table. If someone requires the protective data then he needs to have the permission from the creator.5. Data Independence: Data independence is achieved more easily with normalization structure used in a relational database than in the more complicated tree or network structure.6. Data Manipulation Language: The possibility of responding to query by means of a language based on relational algebra and relational calculus e.g SQL is easy in the relational database approach. For data organized in other structure the query language either becomes complex or extremely limited in its capabilities.

Limitations of relational database model1. Performance: A major constraint in the use of relational database system is machine performance. If there is an enormous data in the tables then the performance gets affected in responding to the sql queries.2. Physical Storage Consumption: With an interactive system, for example an operation like join would depend upon the physical storage also. It is, therefore common in relational databases to tune the databases and in such a case the physical data layout would be chosen so as to give good performance in the most frequently run operations. It therefore would naturally result in the fact that the lays frequently run operations would tend to become even more shared.3. Slow extraction of meaning from data: If the data is naturally organized in a hierarchical manner and stored as such, the hierarchical approach may give quick meaning for that data.

Object-oriented database model gaining acceptance for developing application and managing the hypermedia database at the business website because it’s innovative. Multimedia-web based applications for internet & corporate intranets/ extranets have become a major application area for object technology. Object-oriented database model can handle complex data such as graphics, pictures, voice & text, better than the old structure. They are easy to use & they are the key technology being used in multimedia based applications for Internet & corporate extranets. As well as they support inheritance-new objects which can can be automatically created by replacing some or all the characteristics of one or more parent objectives.

By Jatin Chhabra.