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Explain the structure of well formed formulae in relational calculus. Ans: a. An atom is a formula b. If P1 is a formula, after that so are ¬P1 and (P1) c. If P1 and P2 a
How to use Oracle
Define the term Domain. For each n every attribute there is a set of permitted values known as the domain of that attribute.
Implementing software control To implement software control designer must redesign strategy of state event model which is present in dynamic model. There are three basic ap
List the types of authorization. A) Read authorization B) Write authorization C) Update authorization D) Drop authorization
Why is need for the multiple access paths?
Adding Redundant Associations for Efficient Access Redundant associations do not add any type of information, therefore during design we should actually examine structure of o
Describe the storage structure of indexed sequential files and their access method. Ans: Index offers a lookup capability to rapidly reach the vicinity of the desired record.
education.
Strong entity set and weak entity set? Strong entity set and weak entity set: A strong entity set has a primary key. All tuples in the set are distinguishable through that key.
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