Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Expert Solution & Answer
Chapter 16, Problem 8PE
a.
Explanation of Solution
The plan for the given query:
- The given query is,
select * from r,s where upper(r,A)= upper(s,A)
- The relations “r” and “s” have been created and the records for the relations have been inserted to the relations...
b.
Explanation of Solution
Explanation:
- The given query is,
select * from r,s where upper(r,A)= upper(s,A)
- The ways to efficiently use the hash join for the given query is as follows,
- Apply the “upper()” function on “r.A” and “s.A”.
- To optimize the query result, use hashing...
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Chapter 16 Solutions
Database System Concepts
Ch. 16 - Prob. 2PECh. 16 - Prob. 3PECh. 16 - SQL allows relations with duplicates (Chapter 3),...Ch. 16 - Prob. 5PECh. 16 - Prob. 6PECh. 16 - Prob. 7PECh. 16 - Prob. 8PECh. 16 - Prob. 9PECh. 16 - Prob. 10PECh. 16 - Prob. 12PE
Ch. 16 - Prob. 13PECh. 16 - Prob. 14PECh. 16 - Prob. 16ECh. 16 - Prob. 17ECh. 16 - Prob. 19ECh. 16 - Explain how to use a histogram to estimate the...Ch. 16 - Prob. 21ECh. 16 - Prob. 22ECh. 16 - Describe how to incrementally maintain the results...Ch. 16 - Prob. 24ECh. 16 - Prob. 25ECh. 16 - Prob. 26ECh. 16 - Prob. 27E
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