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) 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.
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) 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.
Chapter2: Database Design Fundamentals
Section: Chapter Questions
Problem 11RQ
Related questions
Question
100%
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 4 steps
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.Recommended textbooks for you
A Guide to SQL
Computer Science
ISBN:
9781111527273
Author:
Philip J. Pratt
Publisher:
Course Technology Ptr
Principles of Information Systems (MindTap Course…
Computer Science
ISBN:
9781305971776
Author:
Ralph Stair, George Reynolds
Publisher:
Cengage Learning
A Guide to SQL
Computer Science
ISBN:
9781111527273
Author:
Philip J. Pratt
Publisher:
Course Technology Ptr
Principles of Information Systems (MindTap Course…
Computer Science
ISBN:
9781305971776
Author:
Ralph Stair, George Reynolds
Publisher:
Cengage Learning
Database Systems: Design, Implementation, & Manag…
Computer Science
ISBN:
9781285196145
Author:
Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos Coronel
Publisher:
Cengage Learning
Database Systems: Design, Implementation, & Manag…
Computer Science
ISBN:
9781305627482
Author:
Carlos Coronel, Steven Morris
Publisher:
Cengage Learning
Principles of Information Systems (MindTap Course…
Computer Science
ISBN:
9781285867168
Author:
Ralph Stair, George Reynolds
Publisher:
Cengage Learning