What is a database?
A database is an organized collection of structured data stored electronically in a computer system.
When the computer was first invented, it was mainly used for scientific researches to perform calculation quickly.
Since the computer was adopted more and more, the requirements were also increased to require the computer to store a larger volume of data for fast retrieval.
Before the database system was invented, the flat file structure was commonly used to store data.
An Oracle database is a collection of data treated as a unit. The purpose of a database is to store and retrieve related information. A database server is the key to solving the problems of information management.
In general, a server reliably manages a large amount of data in a multiuser environment so that many users can concurrently access the same data. All this is accomplished while delivering high performance. A database server also prevents unauthorized access and provides efficient solutions for failure recovery.
Oracle Database is the first database designed for enterprise grid computing, the most flexible and cost effective way to manage information and applications. Enterprise grid computing creates large pools of industry-standard, modular storage and servers.
With this architecture, each new system can be rapidly provisioned from the pool of components. There is no need for peak workloads, because capacity can be easily added or reallocated from the resource pools as needed.
The database has logical structures and physical structures. Because the physical and logical structures are separate, the physical storage of data can be managed without affecting the access to logical storage structures.
An Oracle Database (aka Oracle RDBMS) is a collection of data organized by type with relationships being maintained between the different types. The primary purpose of a database is to store and retrieve related information.
