Consider the relational schema below: Students(sid: integer, sname: string, major: string) Courses(cid: string, cname: string) Enrollment(sid: integer, cid: string, grade: real) Write a tuple relational calculus expression that satisfies this query? Find the distinct names of all students who major in either "Math" or "Economics" who score less than 60% in either course 91.574 or in course 14.501 (using cid)
Consider the relational schema below: Students(sid: integer, sname: string, major: string) Courses(cid: string, cname: string) Enrollment(sid: integer, cid: string, grade: real) Write a tuple relational calculus expression that satisfies this query? Find the distinct names of all students who major in either "Math" or "Economics" who score less than 60% in either course 91.574 or in course 14.501 (using cid)
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Consider the relational schema below:
Students(sid: integer, sname: string, major: string)Courses(cid: string, cname: string)
Enrollment(sid: integer, cid: string, grade: real)
Write a tuple relational calculus expression that satisfies this query?
- Find the distinct names of all students who major in either "Math" or "Economics" who score less than 60% in either course 91.574 or in course 14.501 (using cid).
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