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Answer the following questions concerning Figures 1-16 and 1-17: FIGURE 1-16 SQL definition of ProductLine table CREATE TABLE ProductLine T (ProductLinelD VARCHAR (40) NOT NULL PRIMARY KEY, PIPrlorYearGoal DECIMAL, PICurrentYearGoal DECIMAL); FIGURE 1-17 SQL definition of Product table CREATE TABLE Product T (ProductiD NUMBER(11,0) NOT NULL PRIMARY KEY ProductDescription VARCHAR (50), ProductFinish VARCHAR (20), ProductStandardPrice DECIMAL(6,2), ProductCost DECIMAL, ProductPriorYearGoal DECIMAL, ProductCurrentYearGoal DECIMAL, ProductLinelD VARCHAR (40), FOREIGN KEY (ProductLinelD) REFERENCES ProductLIne T (ProductLineID)); a. What will be the field size for the ProductLineName field in the Product table? Why? b. In Figure 1-17, how is the ProductID field in the Product table specified to be required? Why is it a required attribute? c. In Figure 1-17, explain the function of the FOREIGN KEY definition.

Answer the following questions concerning Figures 1-16 and 1-17: FIGURE 1-16 SQL definition of ProductLine table CREATE TABLE ProductLine T (ProductLinelD VARCHAR (40) NOT NULL PRIMARY KEY, PIPrlorYearGoal DECIMAL, PICurrentYearGoal DECIMAL); FIGURE 1-17 SQL definition of Product table CREATE TABLE Product T (ProductiD NUMBER(11,0) NOT NULL PRIMARY KEY ProductDescription VARCHAR (50), ProductFinish VARCHAR (20), ProductStandardPrice DECIMAL(6,2), ProductCost DECIMAL, ProductPriorYearGoal DECIMAL, ProductCurrentYearGoal DECIMAL, ProductLinelD VARCHAR (40), FOREIGN KEY (ProductLinelD) REFERENCES ProductLIne T (ProductLineID)); a. What will be the field size for the ProductLineName field in the Product table? Why? b. In Figure 1-17, how is the ProductID field in the Product table specified to be required? Why is it a required attribute? c. In Figure 1-17, explain the function of the FOREIGN KEY definition.

Database System Concepts
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
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Answer the following questions concerning Figures 1-16 and 1-17: FIGURE 1-16 SQL definition of ProductLine table CREATE TABLE ProductLine T (ProductlinelD VARCHAR (40) NOT NULL PRIMARY KEY, PIPrlorYearGoal DECIMAL, PICurrentYearGoal DECIMAL); FIGURE 1-17 SQL definition of Product table CREATE TABLE Product T (ProductiD NUMBER(11,0) NOT NULL PRIMARY KEY ProductDescription VARCHAR (50), ProductFinish VARCHAR (20), ProductStandardPrice DECIMAL(6,2), ProductCost DECIMAL, ProductPriorYearGoai DECIMAL, ProductCurrent YearGoal DECIMAL, ProductLinelD VARCHAR (40), (ProductLinelD) REFERENCES ProductLIne T (ProductLineID)); FOREIGN KEY a. What will be the field size for the ProductLineName field in the Product table? Why? b. In Figure 1-17, how is the ProductID field in the Product table specified to be required? Why is it a required attribute? c. In Figure 1-17, explain the function of the FOREIGN KEY definition.
Transcribed Image Text:Answer the following questions concerning Figures 1-16 and 1-17: FIGURE 1-16 SQL definition of ProductLine table CREATE TABLE ProductLine T (ProductlinelD VARCHAR (40) NOT NULL PRIMARY KEY, PIPrlorYearGoal DECIMAL, PICurrentYearGoal DECIMAL); FIGURE 1-17 SQL definition of Product table CREATE TABLE Product T (ProductiD NUMBER(11,0) NOT NULL PRIMARY KEY ProductDescription VARCHAR (50), ProductFinish VARCHAR (20), ProductStandardPrice DECIMAL(6,2), ProductCost DECIMAL, ProductPriorYearGoai DECIMAL, ProductCurrent YearGoal DECIMAL, ProductLinelD VARCHAR (40), (ProductLinelD) REFERENCES ProductLIne T (ProductLineID)); FOREIGN KEY a. What will be the field size for the ProductLineName field in the Product table? Why? b. In Figure 1-17, how is the ProductID field in the Product table specified to be required? Why is it a required attribute? c. In Figure 1-17, explain the function of the FOREIGN KEY definition.
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