Database System Concepts
7th Edition
ISBN: 9789332901384
Author: Henry F. Korth & S. Sudarshan Abraham Silberschatz
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 4, Problem 1PE
Explanation of Solution
Wrong with the query:
- The given query is considered to be syntactically correct but it does not compute the answers as expected because for “dept_name” is considered to be an attribute for both “course” and “instructor”.
- Due to the result of the natural join, the outputs are shown only when the instructor teaches a course in his or her own corresponding department.
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Chapter 4 Solutions
Database System Concepts
Ch. 4 - Prob. 1PECh. 4 - Prob. 2PECh. 4 - Prob. 3PECh. 4 - Prob. 4PECh. 4 - Prob. 5PECh. 4 - Prob. 6PECh. 4 - Prob. 7PECh. 4 - Prob. 8PECh. 4 - SQL allows a foreign-key dependency to refer to...Ch. 4 -
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