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 10RQ

Explanation of Solution

Difference between UNION and UNION ALL:

UNIONUNION ALL
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.The UNION ALL set operator is used to combine the output of two or more than two queries and produce a result. The produced result contains duplicate values.
Syntax: QUERY  UNION QUERY;Syntax: QUERY  UNION ALL QUERY;

Example for UNION:

Consider two tables,

The table “T1(ID, fruit_name)” contains rows with values (1, 'Mango' ), (1, 'Orange' ), (3, 'Grapes' ).

The table “T2(ID, fruit_name)” contains rows with values (1, 'Mango' ), (1, 'Apple' ), (3, 'Grapes' )...

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The following is a table of applicants to be considered for admission into 07BSAM: POINTS MATH SYMBOL 123 450 NAMES STUDENT NUMBER ENG SYMBOL To qualify for admission, an applicant should have at least 25 points, minimum of B symbol in Mathematics and a minimum of E symbol in English. If an applicant has a C symbol in Mathematics, then the applicant must pass an entrance test to be considered for admission. Hints: There are three modes of study: The Full-time mode, the Part-time mode and the Distance mode. Applicants can choose which mode they want provided there is space in that mode. Each of the Full- time and the Part-time modes cannot accommodate more 30 admitted students. After these two modes are full, every other qualified applicant is admitted in the Distance mode. The admission exercise is first come first served. Write a pseudocode that identifies the applicants that qualify for admission and outputs their names, student numbers and modes of study. Use a FOR-LOOP /…

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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