Database Management Systems
Database management systems are defined as computer software made for organizing, analyzing and modifying the information stored in a database. It is a set of programs that helps in controlling the organization's storage and retrieval of data in a database. Database Management Systems examples are Oracle, Microsoft Access, Microsoft SQL server and File maker. The greatest advantage of using database management systems is that information can be changed easily according to the company's requirements.
It employs the use of a query language and report writers to extract information from the database and analyze the data.
Relational database, network database, hierarchical database are the types of database management systems depending on the way database management systems organize information internally.
The market consisting of database management systems providers & suppliers experienced rapid growth of 9.5% in 2006. The total revenue of the market exceeded 5 billion euros in 2006. Computerized library systems, automated teller machines, flight reservation systems are all examples of database applications.
Various database management systems types are listed below along with information on database providers & suppliers.
Distributed Database
A database that consists of two or more data files stored on multiple sites on a computer network. A distributed database is divided in to many partitions or fragments that can easily be copied. Many users can access the database at the same time without interfering each other. The most important benefit of distributed database management system is that they are economical and can be modified, added or removed from the system easily.
Network Database
The network database is a database that is constructed like a set. The set contains an owner record type, the name of the set and a record type of the member. In this model the whole network of relationships is symbolized by many paired sets. The network database model represents different objects and their relationships in a flexible manner. It is basically used by network installation tool for finding and allocating the network resources.
Object Oriented Database
The object oriented database management system (OODBMS) presents information in the form of objects that are used in Object-Oriented Programming. In other words we can say that object database management systems are a combination of database capabilities and object programming language capabilities. The main feature of ODBMS is that it makes database objects look like programming language objects. Some of these object oriented database languages are Python, Java, C, Visual Basic, .NET, C++ and Smalltalk.
Relational Database
Relational Database aids in storing, managing and disseminating information of various types. The RDBMS contains objects, tables, queries, forms, reports, macros stored in the form of computer programs. In the RDBMS the data and the relationship between them are properly organized in tables (accumulation of records with every entry having the same field). In the table the fields and records are represented as columns and rows respectively. This model can increase the versatility and speed of the database using the relationship of similar data. Some of the examples of this model are Sybase, Informix, OLEDB, SQL server, and Oracle.
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