Consider the Oracle Virtual Private Database (VPD) feature described in Section 9.8.5 and an application based on
Question:
Consider the Oracle Virtual Private Database (VPD) feature described in Section 9.8.5 and an application based on our university schema.
a. What predicate (using a subquery) should be generated to allow each faculty member to see only takes tuples corresponding to course sections that they have taught?
b. Give an SQL query such that the query with the predicate added gives a result that is a subset of the original query result without the added predicate.
c. Give an SQL query such that the query with the predicate added gives a result containing a tuple that is not in the result of the original query without the added predicate.
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a The following predicate can be added to queries on takes to ensure that each faculty member only s...View the full answer
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Related Book For 
Database System Concepts
ISBN: 9780078022159
7th Edition
Authors: Abraham Silberschatz, Henry F. Korth, S. Sudarshan
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