Consider the following UNIVERSITY DB, the given SQL query, and the provided canonical tree. Apply Transformation rules and heuristic algorithm to optimize the query. Student(sno,sname,address,phone) Professor(pno, ssn, pname, address, phone) Lecture(lno, pno, time, date) Attend(sno,lno) SELECT s.sname FROM student s, attend a, lecture l, professor p WHERE s.sno=a.sno AND a.lno=l.lno AND l.pno=p.pno and p.ssn=“100456”
Consider the following UNIVERSITY DB, the given SQL query, and the provided canonical tree. Apply Transformation rules and heuristic algorithm to optimize the query. Student(sno,sname,address,phone) Professor(pno, ssn, pname, address, phone) Lecture(lno, pno, time, date) Attend(sno,lno) SELECT s.sname FROM student s, attend a, lecture l, professor p WHERE s.sno=a.sno AND a.lno=l.lno AND l.pno=p.pno and p.ssn=“100456”
Programming with Microsoft Visual Basic 2017
8th Edition
ISBN:9781337102124
Author:Diane Zak
Publisher:Diane Zak
Chapter4: The Selection Structure
Section: Chapter Questions
Problem 5MQ2: What is the opposite of greater than?
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Consider the following UNIVERSITY DB, the given SQL query, and the provided canonical tree. Apply Transformation rules and heuristic
Student(sno,sname,address,phone) Professor(pno, ssn, pname, address, phone) Lecture(lno, pno, time, date) Attend(sno,lno)
SELECT s.sname
FROM student s, attend a, lecture l, professor p
WHERE s.sno=a.sno AND a.lno=l.lno AND l.pno=p.pno and p.ssn=“100456”
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