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What is a candidate key?
Minimal super keys are known as candidate keys.
List two restrictions that are applied on the modification (updation, insertion or deletion) of base tables through view. Ans: The two restrictions are: 1. If a view
define lock conversion
The functions of DBA ?
Define the terms i) DDL ii) DML DDL: Data base schema is particular by a set of definitions expressed by a special language known as a data definition language. DML: A data
Define Boyce codd normal form A relation schema R is in BCNF with respect to a set F of functional dependencies if, for all functional dependencies in F + of the form.α ->β.
3 assignments combined in 1
Explain the Functional Mode with help of an example. Functional Model The functional model shows a computation and functional derivation of data values in it without ind
3. (10 points) Assume that you have been presented with the following relation for the Baxter Aviation database: Charters (Pilot#, Pilot name, Aircraft ID#, #seats, Village, Fligh
What is D command work in the respect of QBE? D: It is the command inside QBE to delete tuple(s) from the relation.
Mention the several levels in security measures. A) Database system B) Operating system C) Network D) Physical Human
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