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A database is an organized collection of data for a particular purpose (e.g., manage orders). This data is organized and stored in a database so users can use it easily. We use databases everyday: a simple address book is a database. The address book allows you to store names, addresses, phone numbers, etc. The alphabetical index allows you to easily find a person. In a computerized database, we find the same concepts as in the address book: - the information stored corresponds to the items.
- the groups of information correspond to the data files,
- the indexes are created from the sort items (called keys).
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