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Relation Schema: o (Selection) | 1 (Projection) | N/U/– (Set operations) | × (Join operation) employee(employee-name, street, city) as E works(employee-name, company-name, salary) as W company(company-name, city) as C manages(employee-name, manager-name) as M 1. Find the names of all employees in the database who earn more than 100k. 2. Find the names of all employees in the database who live in the same city as the city of their companies. 3. Find the employee's name who earn more than his/her manager. SOL --- Select-From-Where (a) Find the name of employee who lives in New York City. (b) Find the names of employee who earn more than 100k.

Relation Schema: o (Selection) | 1 (Projection) | N/U/– (Set operations) | × (Join operation) employee(employee-name, street, city) as E works(employee-name, company-name, salary) as W company(company-name, city) as C manages(employee-name, manager-name) as M 1. Find the names of all employees in the database who earn more than 100k. 2. Find the names of all employees in the database who live in the same city as the city of their companies. 3. Find the employee's name who earn more than his/her manager. SOL --- Select-From-Where (a) Find the name of employee who lives in New York City. (b) Find the names of employee who earn more than 100k.

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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### Relation Schema **σ (Selection) | π (Projection) | ∩ ∪ / - (Set operations) | ⨝ (Join operation)** - **employee**(employee-name, street, city) as **E** - **works**(employee-name, company-name, salary) as **W** - **company**(company-name, city) as **C** - **manages**(employee-name, manager-name) as **M** ### Queries 1. **Find the names of all employees in the database who earn more than 100k.** 2. **Find the names of all employees in the database who live in the same city as the city of their companies.** 3. **Find the employee’s name who earns more than his/her manager.** ### SQL --- Select-From-Where Statements (a) **Find the name of employee who lives in New York City.** (b) **Find the names of employees who earn more than 100k.**
Transcribed Image Text:### Relation Schema **σ (Selection) | π (Projection) | ∩ ∪ / - (Set operations) | ⨝ (Join operation)** - **employee**(employee-name, street, city) as **E** - **works**(employee-name, company-name, salary) as **W** - **company**(company-name, city) as **C** - **manages**(employee-name, manager-name) as **M** ### Queries 1. **Find the names of all employees in the database who earn more than 100k.** 2. **Find the names of all employees in the database who live in the same city as the city of their companies.** 3. **Find the employee’s name who earns more than his/her manager.** ### SQL --- Select-From-Where Statements (a) **Find the name of employee who lives in New York City.** (b) **Find the names of employees who earn more than 100k.**
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