Introduction to Databases

A database is a collection of related data.

 

A typical dictionary definition to databases:

  • Accepting structured data (insert, amend, delete).
  • Computing function on the present data.
  • Sorting the structured data.
  • Providing (querying).

 

On demand, information for multiple end users.

 

Each database has the following properties:

  • It is a representation of a real world application (called the application domain).
  • The contents of the database are semantically related.
  • Designed, kept up-to-date and maintained for the benefit of its users (i.e. end users).

 

A database may be maintained manually or by the machine. A computerised database may be created and maintained by application programs written specifically or by a database management system (DBMS).

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