the number of courses taken by all students named

08 Jun the number of courses taken by all students named

Posted at 09:31h in Essay Writing Services by Blogger

Question

Consider the following relations for a database that keeps track of student enrollment in courses and the books adopted for each course:

STUDENT(SSN, Name, Major, Bdate)

COURSE(Course#, Cname, Dept)

ENROLL(SSN, Course#, Quarter, Grade)

BOOK_ADOPTION(Course#, Quarter, Book_ISBN)

TEXT(Book_ISBN, Book_Title, Publisher, Author)

Specify the foreign keys for the above schema, stating any assumptions you make. Then specify the following queries in relational algebra:

a. List the number of courses taken by all students named ‘John Smith’ in Winter 1999 (i.e., Quarter = ‘W99’).

b. Produce a list of textbooks (include Course#, Book_ISBN, Book_Title) for courses offered by the ‘CS’ department that have used more than two books.

c. List any department that has all its adopted books published by ‘BC Publishing’.

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