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Define blocks?
The database system resides eternally on non-volatile storage, and is into fixed-length storage units known as blocks.
What are composite attributes? Composite attributes can be separated in to sub parts.
intent locking
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#
Describe entity referential integrity and integrity. Give an example of each. Entity Integrity Rule - If there is a attribute A of relation R is a prime attribute of R then A
The users who use easy-to-use menu are called ? The users who use easy to use menu are called as Naïve users.
Change the city of First Bank Corporation to ‘New Delhi' UPDATE COMPANY SET CITY = ‘New Delhi' WHERE COMPANY_NAME = ‘First Bank Corporation';
Describe the GRANT function and explain, how it associates to security. What kind of privileges may be granted? How are they revoked? Ans: Since more than one user can aacce
what is the importance of back up files
Explain how the associations are implemented as classes. A general approach in this case is to transform an association class into a simple class linked to two original classes
In the architecture of a database system which external level used? In the architecture of a database system view external level used.
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