The definition of a database
Are related by a set of data that is processed by a computer data management system
① public data (Shared Data)
② Integrated Data (Integrated Data)
Integration, such as Iran, in principle, there is no duplication of data-intensive means that overall
③ stored data (Stored Data) - What is stored as magnetic tape, magnetic disk storage media, computer, means that more
④ operational data (Operational Data)
Data in the database, the operating data, operational data, not just Iran to carry out the unique features of the organization the necessary data
The purpose of the database
① independence of data (Data Independence)
② minimization of data redundancy (Minimal Redundancy)
③ Data Sharing (Data Sharing)
④ maintain security (Security)
⑤ Integrity (Integrity)
What is the integrity of data within the database must be accurate
For this purpose, determined for data entry to data limitations prescribed for the treatment of information must be followed faithfully, the ultimate purpose of the database
⑥ consistent (Consistency)
Do not allow the duplication of data entry is not possible in reality a different item shown in the data must match
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