Database Systems: Design, Implementation, & Management
Database Systems: Design, Implementation, & Management
11th Edition
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
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Chapter 8, Problem 11RQ
Program Plan Intro

UNION set operator:

The UNION set operator is used to combine the output of two or more than two queries and produce a result. The produced result contains unique values.

Syntax: QUERY UNION QUERY;

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Given the table customers which contains columns customer_id, first name, last name, and state, and a table named addresses that contains columns address_id, customer id, state, city, zip, and street. Write a query that returns all customers last names with their state and zip. Assume that customer id in the addresses table is foreign key referencing customer_id in the customers table.
(A)  Write a query which shows the employee IDs that are unique to the employee table. Order the employee IDs in descending order. An employee ID Is the same in both tables if the integer value of the ID matches. (B) We want to add a new column to the employee table. We want to provide a new column with a more complete phone number. Right now the PHONENO column only shows the last 4 digits. We want a new column which is called PHONE and consists of ###-###-####. The last 4-digits are already in the PHONENO column. The first three digits should be 416 and the next three should be 123. To improve clarity in the table, we also want to rename the PHONENO column to PHONEEXT. Show all the commands used to accomplish this, then, select all data for employees who have the last name of 'smith' (case insensitive). (C) Show a list of employee id, names, department, years and job of any employee in the staff table who makes a total amount more than their manager or has more years of service than…
Some rows of the STUDENT table are shown below:   CODE NAME GPA YEAR 291 ALEX 3.1 2 938 MICHELE 2.3 1 931 JHON 3.3 1 182 JOE 3.4 2 190 REY 2.0 2 330 RON 3.9 3   Which best describes the result of the query below?   SELECT YEAR, AVG(GPA) FROM STUDENT WHERE GPA > 2.0 GROUP BY YEAR     a. The average maximum GPA of all the students in each year.   b. The year of the student with the maximum GPA.   c. The average GPA of students with a GPA higher than 2.0 each year.   d. The average GPA of the students with a GPA higher than 2.0.

Chapter 8 Solutions

Database Systems: Design, Implementation, & Management

Ch. 8 - Prob. 11RQCh. 8 - Prob. 12RQCh. 8 - Prob. 13RQCh. 8 - Given the employee information in Question 11,...Ch. 8 - Prob. 15RQCh. 8 - Prob. 16RQCh. 8 - Prob. 17RQCh. 8 - Prob. 18RQCh. 8 - What string function should you use to list the...Ch. 8 - Prob. 20RQCh. 8 - Prob. 21RQCh. 8 - Prob. 22RQCh. 8 - Prob. 23RQCh. 8 - Prob. 24RQCh. 8 - Prob. 1PCh. 8 - Insert the data into the tables you created in...Ch. 8 - Prob. 3PCh. 8 - Prob. 4PCh. 8 - Prob. 5PCh. 8 - Prob. 6PCh. 8 - Prob. 7PCh. 8 - Prob. 8PCh. 8 - Prob. 9PCh. 8 - Modify the CUSTOMER table to include two new...Ch. 8 - Prob. 11PCh. 8 - Prob. 12PCh. 8 - Prob. 13PCh. 8 - Prob. 14PCh. 8 - Prob. 15PCh. 8 - Prob. 16PCh. 8 - Write a trigger to update the customer balance...Ch. 8 - Write a procedure to delete an invoice, giving the...Ch. 8 - Prob. 19PCh. 8 - Prob. 20PCh. 8 - Prob. 21PCh. 8 - Prob. 22PCh. 8 - Prob. 23PCh. 8 - Prob. 24PCh. 8 - Prob. 25PCh. 8 - Prob. 26PCh. 8 - Prob. 27PCh. 8 - Create a trigger named trg_line_total to write the...Ch. 8 - Create a trigger named trg_line_prod that...Ch. 8 - Create a stored procedure named prc_inv_amounts to...Ch. 8 - Create a procedure named prc_cus_balance_update...Ch. 8 - Modify the MODEL table to add the attribute and...Ch. 8 - Prob. 33PCh. 8 - Modify the CHARTER table to add the attributes...Ch. 8 - Write the sequence of commands required to update...Ch. 8 - Write the sequence of commands required to update...Ch. 8 - Write the command required to update the...Ch. 8 - Write the command required to update the...Ch. 8 - Write the command required to update the...Ch. 8 - Prob. 40PCh. 8 - Create a trigger named trg_char_hours that...Ch. 8 - Create a trigger named trg_pic_hours that...Ch. 8 - Create a trigger named trg_cust_balance that...Ch. 8 - Alter the DETAILRENTAL table to include a derived...Ch. 8 - Alter the VIDEO table to include an attribute...Ch. 8 - Update the VID_STATUS attribute of the VIDEO table...Ch. 8 - Alter the PRICE table to include an attribute...Ch. 8 - Prob. 48CCh. 8 - Prob. 51C
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