Consider the following expressions, which use the result of a relational algebra operation as the input to another operation. For each expression, explain in words what the expression does. a. year 2009 (takes) ▷ student b. year 2009 (takes ▷ student) C. ID.name, course_id (student takes)

Consider the following expressions, which use the result of a relational algebra operation as the input to another operation. For each expression, explain in words what the expression does. a. year 2009 (takes) ▷ student b. year 2009 (takes ▷ student) C. ID.name, course_id (student takes)

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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Question

Consider the following expressions, which use the result of a relational
algebra operation as the input to another operation. For each expression,
explain in words what the expression does.
a. year 2009 (takes) ▷ student
b. year 2009 (takes ▷ student)
C.
ID.name, course_id (student takes)

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