Relational Database vs Object Oriented Database
Institute of graduate studies &research Information technology department
Database systems
Report on:
(Comparison between Relational database & object oriented database)
By: Mohammed Hussein Mahmoud Mustafa khedr
To: Dr. Saad Darwish
Introduction
A database is a means of storing information in such a way that information can be retrieved from it. Thus a database is typically a repository for heterogeneous but interrelated pieces of information. Often a database contains more than one table. Codebooks and dictionaries can also be considered as tables. A dictionary is a reference book on any subject, the items of which are arranged in alphabetical order. Codebook is a list of replacements for words or phrases in the original message. A code is a system for hiding the meaning of a message by replacing each word or phrase in the original message with another character or set of characters. The list of replacements is contained in a codebook. An alternative definition of a code is any form of encryption which has no builtin flexibility, i.e. there is only one key, namely the codebook. Databases contain organized data. A database can be as simple as a flat file (a single computer file with data usually in a tabular form) containing names and telephone numbers of one’s friends, or as elaborate as the worldwide reservation system of a major airline. There are many ways to approach the design of a database and tables. The database layout is the most important part of an information system. The more design and thought put into a database, the better the database will be in the long run. We should gather information about the user’s requirement, data objects, and data definitions before creating a database layout. Traditionally, there are four different DBMS data models: the hierarchical data model, the network data model, the relational data model, and the objectoriented data model.
These four data models at the same time signifies the historical
Database systems
Report on:
(Comparison between Relational database & object oriented database)
By: Mohammed Hussein Mahmoud Mustafa khedr
To: Dr. Saad Darwish
Introduction
A database is a means of storing information in such a way that information can be retrieved from it. Thus a database is typically a repository for heterogeneous but interrelated pieces of information. Often a database contains more than one table. Codebooks and dictionaries can also be considered as tables. A dictionary is a reference book on any subject, the items of which are arranged in alphabetical order. Codebook is a list of replacements for words or phrases in the original message. A code is a system for hiding the meaning of a message by replacing each word or phrase in the original message with another character or set of characters. The list of replacements is contained in a codebook. An alternative definition of a code is any form of encryption which has no builtin flexibility, i.e. there is only one key, namely the codebook. Databases contain organized data. A database can be as simple as a flat file (a single computer file with data usually in a tabular form) containing names and telephone numbers of one’s friends, or as elaborate as the worldwide reservation system of a major airline. There are many ways to approach the design of a database and tables. The database layout is the most important part of an information system. The more design and thought put into a database, the better the database will be in the long run. We should gather information about the user’s requirement, data objects, and data definitions before creating a database layout. Traditionally, there are four different DBMS data models: the hierarchical data model, the network data model, the relational data model, and the objectoriented data model.
These four data models at the same time signifies the historical
References: 1. Relational and Object-Oriented Databases, by Willi-Hans Steeb , International School for Scientific Computing. 2. Database Management Systems: Relational, Object-Relational, and Object-Oriented Data Models, Lisbeth Bergholt, DTI ,Jacob Steen Due, Rambøll Thomas Hohn, DAIMI, Jørgen Lindskov Knudsen, DAIMI, Kirsten Hjerrild Nielsen WM-data, Thomas Sonne Olesen, DTI, Emil Hahn Pedersen, Rambøll. 3. Comparing Relational and Object-Oriented Databases, Nelson Caballero, University of Maryland University College, 2001.