employee (personname, street, city) works (person_nате, соmpany_лате, salary) соmpany (companyлате, сіtvy) Figure 2.17 Employee database.

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 employee database of Figure 2.17. Give an expression in the relational algebra to express each of the following queries:
a. Find the name of each employee who lives in city “Miami”.
b. Find the name of each employee whose salary is greater than $100000.
c. Find the name of each employee who lives in “Miami” and whose salary
is greater than $100000.

employee (personname, street, city)
works (person_nате, соmpany_лате, salary)
соmpany (companyлате, сіtvy)
Figure 2.17 Employee database.
Transcribed Image Text:employee (personname, street, city) works (person_nате, соmpany_лате, salary) соmpany (companyлате, сіtvy) Figure 2.17 Employee database.
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