Database System Concepts
7th Edition
ISBN: 9789332901384
Author: Henry F. Korth & S. Sudarshan Abraham Silberschatz
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Expert Solution & Answer
Chapter 2, Problem 5PE
Explanation of Solution
Effect of Cartesian product on two relations:
- The Cartesian product operation (×) is used to combine the information from two relations.
- The Cartesian product of two relations r1 and r2 can be written like,
r1 × r2.
For the given relations we can write,
(Student × advisor)
- In the above operation, all the tuples from both the relation is taken and a new relation is created with all the tuples.
- If there is similar column names like “id” in both the relation, then the column name along with the relation name. For example,
student.id and advisor.id
The join operation:
- The join operation is used to select the common tuples from two relations...
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