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Question 1 Consider the following SQL data definition for maintaining information about employees at a hypothetical company. CREATE TABLE emp ( num name dept salary boss INTEGER NOT NULL, VARCHAR (20) NOT NULL, VARCHAR (20) NOT NULL, INTEGER NOT NULL, INTEGER NOT NULL, PRIMARY KEY (num), FOREIGN KEY (boss) REFERENCES emp (num) );

Question 1 Consider the following SQL data definition for maintaining information about employees at a hypothetical company. CREATE TABLE emp ( num name dept salary boss INTEGER NOT NULL, VARCHAR (20) NOT NULL, VARCHAR (20) NOT NULL, INTEGER NOT NULL, INTEGER NOT NULL, PRIMARY KEY (num), FOREIGN KEY (boss) REFERENCES emp (num) );

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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Question 1/ Consider the following SQL data definition for maintaining information about employees at a hypothetical company. 1. 2. CREATE TABLE emp ( num 3. name dept You can assume that there is one president that has herself/himself as the boss, that all other employees have a boss that is someone else and that there are no cycles in the boss hierarchy for anyone other than the president. (A cycle would exist if, for example, Omar was the boss of Jamal and Jamal was in turn the boss of Omar.) Translate each of the following queries on this schema to SQL. salary boss 4. INTEGER NOT NULL, VARCHAR (20) NOT NULL, VARCHAR (20) NOT NULL, INTEGER NOT NULL, INTEGER NOT NULL, PRIMARY KEY (num), FOREIGN KEY (boss) REFERENCES emp (num) ); List the number and name of each employee, excluding the president, together with the number and name of the employee's boss. The result should be sorted by the name of the boss List the names of the departments along with the average salary of their employees. List the numbers and names of employees who have the president as their boss Find the average number of employees per department
Transcribed Image Text:Question 1/ Consider the following SQL data definition for maintaining information about employees at a hypothetical company. 1. 2. CREATE TABLE emp ( num 3. name dept You can assume that there is one president that has herself/himself as the boss, that all other employees have a boss that is someone else and that there are no cycles in the boss hierarchy for anyone other than the president. (A cycle would exist if, for example, Omar was the boss of Jamal and Jamal was in turn the boss of Omar.) Translate each of the following queries on this schema to SQL. salary boss 4. INTEGER NOT NULL, VARCHAR (20) NOT NULL, VARCHAR (20) NOT NULL, INTEGER NOT NULL, INTEGER NOT NULL, PRIMARY KEY (num), FOREIGN KEY (boss) REFERENCES emp (num) ); List the number and name of each employee, excluding the president, together with the number and name of the employee's boss. The result should be sorted by the name of the boss List the names of the departments along with the average salary of their employees. List the numbers and names of employees who have the president as their boss Find the average number of employees per department
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