Consider the relational database tables below and write the relational algebra expression for the following questions. [stdid is studentid, bid is bookid, rdate is reserved date and adate is accessed date] Student (stdid, semester, major, name, score, age) Books (bid, bname, author) Reserve (stdid, bid, rdate) Accessed (stdid, bid, adate) 1. Find out the details of all students who have score greater than or equal to 70. 2. Find the students who belong to 'CSE' major and whose score is greater than 60. 3. Find the name, score of students who belong to 'EC' major and whose score is greater than 50.
Consider the relational database tables below and write the relational algebra expression for the following questions. [stdid is studentid, bid is bookid, rdate is reserved date and adate is accessed date] Student (stdid, semester, major, name, score, age) Books (bid, bname, author) Reserve (stdid, bid, rdate) Accessed (stdid, bid, adate) 1. Find out the details of all students who have score greater than or equal to 70. 2. Find the students who belong to 'CSE' major and whose score is greater than 60. 3. Find the name, score of students who belong to 'EC' major and whose score is greater than 50.
Chapter2: Database Design Fundamentals
Section: Chapter Questions
Problem 3TD
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![Consider the relational database tables below and write the relational
algebra expression for the following questions. [stdid is studentid, bid is
bookid, rdate is reserved date and adate is accessed date]
Student (stdid, semester, major, name, score, age)
Books (bid, bname, author)
Reserve (stdid, bid, rdate)
Accessed (stdid, bid, adate)
1. Find out the details of all students who have score greater than or
equal to 70.
2. Find the students who belong to 'CSE' major and whose score is
greater than 60.
3. Find the name, score of students who belong to 'EC' major and whose
score is greater than 50.
4. Find the stdid of students who have accessed and reserved a book.
5. Find the stdid of students who have accessed but not reserved a
book.
6. Find the names of students who have reserved a book using natural
join.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F1825a1e7-7298-4f12-824d-239410fc4a99%2F2588b27c-9fbd-4b54-840c-d7d9c490cfb5%2F52ybpdd_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Consider the relational database tables below and write the relational
algebra expression for the following questions. [stdid is studentid, bid is
bookid, rdate is reserved date and adate is accessed date]
Student (stdid, semester, major, name, score, age)
Books (bid, bname, author)
Reserve (stdid, bid, rdate)
Accessed (stdid, bid, adate)
1. Find out the details of all students who have score greater than or
equal to 70.
2. Find the students who belong to 'CSE' major and whose score is
greater than 60.
3. Find the name, score of students who belong to 'EC' major and whose
score is greater than 50.
4. Find the stdid of students who have accessed and reserved a book.
5. Find the stdid of students who have accessed but not reserved a
book.
6. Find the names of students who have reserved a book using natural
join.
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