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Where does view definition stored?
A view definition is permanently stored as part of the database.
Draw an entity relationship diagram (ERD) for the following situation: A company has a number of employees. Each employee is identified by an Employee_Id. The company wants to st
Define null values. In some cases a certain entity may not have an applicable value for an attribute or if we do not know the value of an attribute for a certain entity. In the
A database to track your progress in your college program will track your progress towards graduation! A database that has information containing the classes that you have taken, c
10A.53 Code an Oracle Database trigger to enforce the constraint that an employee can never change his or her department. 10A.54 Code an Oracle Database trigger to allow the
Define union compatibility? Explain why INTERSECTION of two relations cannot be performed if they are not union compatible? Two relations R(A1, A2,-------, An) and S(B1, B2,--
QUESTION (a) Consider a car database consisting of car model, car make, car origin, Engine capacity, color, cost.
Which is an advantage of view? The Advantages of view is Data security, Derived columns and Hiding of complex queries
non numeric literals
What are advantages of object models? Object models are efficient for communicating with the application experts and reaching a consensus about the significant aspects of the p
Define the basic operations of the relational algebra? Ans: Basic operators of relational algebra are: 1. Union (∪) - Selects tuples which are in either P or Q or in bot
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