A database is an integrated collection of computer data, organized and stored in a way that facilitates retrieval. The lagic integration of records in many of these files is called database concepts that aim to minimize data repetition (data duplication means the same data is stored in multiple files) and achieve data independence (the ability to make changes in the data structure without making changes to programs that process data).
The independence of data is obtained by placing data specifications in data tables and dictionaries that are physically separate from the program. Program refers to tables to access data.
Data hierarchy in database system concept is Database, File, Record, and Data Element.
The independence of data is obtained by placing data specifications in data tables and dictionaries that are physically separate from the program. Program refers to tables to access data.
Data hierarchy in database system concept is Database, File, Record, and Data Element.
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