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Attributes that are directly kept in the data base.
For example, 'Birth date' attribute of a person.
Derived
Attributes that are not stored directly but can be derived from stored attributes are known as derived attributes. For instance, The years of services of a 'person' entity can be determined from the present date and the date of joining of the person. Likewise, total salary of a 'person' can be calculated from 'basic salary' attribute of a 'person'.
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Creating views with Read only option : In the view definition this option is used to make sure that no DML operations can be done on the view.
Question: Consider the following database relations for a textbook ordering system used by a college bookshop: Book (b-copy#, bname, ISBN#, author, price, subject) Order (s#
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#A multinational tour operator agency has gained new business growth in the North American market through the use of social media. Its operation has expanded by 50% within six mont
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Explain the database Planning Project ?
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