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Some disadvantages of File Oriented System ?
What is a primary key? Primary key is chosen by the database designer as the principal means of identifying an entity in the entity set.
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Define entity integrity and referential integrity. How does SQL allow specification of these? Ans: Entity Integrity Rule- If the attribute A of relation R is a prime attribut
ERD Diagram of Medical Recruitment Agency?
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About Attribute inheritance
Consider the table student and list names of students in the departments other than maths and computer. SELECT std_name FRM student WHERE dept_name NOT IN (‘Maths','Computer);
What are wait-for-graphs?Give the algorithm to construct a wait-for-graph from a given schedule of transactions? How can deadlocks be detected from wait-for-graphs? Ans: The
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