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What is an Operand?
The data on which the operation is to be performed is known as an Operand
What is trigger? Triggers are statements that are executed automatically by the system as the side effect of a modification to the database.
What is data integrity? Ans: It is the data consisted of in database that is accurate and consistent. (Data integrity means that the data should be valid as per to the give
What is conceptual model ? A conceptual model is a independent of both hardware and software.
Removing a Synonym: DROP SYNONYM D30;
Write short notes on tuple relational calculus. The tuple relational calculation is anon procedural query language. It defines the desired information without giving a particul
One-way Associations When an association is traversed only in the one direction, then it is implemented as a pointer i.e.an attribute which contains an object reference. If mu
Which is an advantage of view? The Advantages of view is Data security, Derived columns and Hiding of complex queries
Probelm: a) In the context of OODBMS, define the following terms with appropriate examples. (i) Object class. (ii) Abstract class. (iii) Aggregation. (iv)
Example: //REVOKE ALL ON EMP FROM MCA12; (All permissions will be cancelled) You can also cancel only some of the permissions. Drop: A user-
Views in relational algebra: 1. Basic expression contains either a) A relation in the database. b) A constant relation. 2. General expressions are madde out of sma
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