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Define weak and strong entity sets?
Weak entity set: entity set that do not have key attribute of their own are known as weak entity sets.
Strong entity set: Entity set that has a primary key is term a strong entity set.
The physical location of a record is determined by which mathematical formula that transforms a file key into a record location? The physical location of a record is determined
What are partial, alternate,, artificial, compound and natural key? Partial Key: It is a set of attributes that can uniquely recognize weak entities and that are related to s
give me a diagram about physical or internal level
what is query processing?
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Consider a typical sales invoice that would include the following information. Design a single table to hold all of the information required to store an invoice including this info
Define a property that is not a property of transactions? Ans: Concurrency is not a property of transactions
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