Question: What is foreign key constraint in databases? Briefly explain by using an example. What is the difference among a base table, a virtual view

What is foreign key constraint in databases? Briefly explain by using an example. What is the difference

What is foreign key constraint in databases? Briefly explain by using an example. What is the difference among a base table, a virtual view and a materialized view?

Step by Step Solution

★★★★★

3.41 Rating (151 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

Foreign Key Constraint A foreign key constraint in a database is a rule or relationship that enforces referential integrity between two tables It spec... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Databases Questions!

In particular, you were introduced to three decision-making techniques -- majority rule, minority rule by authority or expertise, and consensus rule -- each with their own pros and cons. Using these...

List three specific parts of the Case Guide, Objectives and Strategy Section (See below) that you had the most difficulty understanding. Describe your current understanding of these parts. Provide...

Add referential integrity between: a. Department table and Employee table, add foreign key constraint in the Employee table. b. Employee table and Dependent table, add foreign key constraint in the...

ESTIMATING DIRECT RETURN ON INVESTMENT OF INDEPENDENT VERIFICATION AND VALIDATION USING COCOMO-II James B. Dabney Systems Engineering Program University of Houston - Clear Lake Houston, Texas...

\f1. INTRODUCTION TO PREPARING A WRITTEN CASE REPORT The method for a basic case analysis presented in Note 2 of the Case Guide Series"Performing a Case Analysis,\" No. 9B18M054can be used for...

Aligning organisational growth and core values at Akhuwat - LUMS Case (Reading: Robbins & Judge - Chapter 16-Organizational Culture; Vanourek, B., & Vanourek, G. 2012. Triple crown leadership:...

Describe the types of cybercrimes facing organizations and critical infrastructures, explain the motives of cybercriminals, and evaluate the financial Explain both low-tech and high-tech methods...

A creative engineer suggests structuring the TLB so that not all the bits of the presented address need match to result in a hit. Suggest how this might be achieved, and what might be the costs and...

Alavi & Leidner/Knowledge Management MISQ REVIEW REVIEW: KNOWLEDGE MANAGEMENT AND KNOWLEDGE MANAGEMENT SYSTEMS: CONCEPTUAL FOUNDATIONS AND RESEARCH ISSUES1, 2 By: Maryam Alavi John and Lucy Cook...

1. Which of the following represents the core drives of the information age? A. Data, Information, Business Intelligence, Knowledge. B. Fact, Data, Intelligence, Experience. C. Fact, Intelligence,...

For solving Ax = b, consider the stationary Richardson iteration Xk+1=Xk+a (b Ax). For this question, we assume that all eigenvalues of A are real. (a) Find the iteration matrix. (b) Show that if...

Sal and Hal are cousins that have a dispute regarding the ownership of a Las Vegas casino. During the course of the litigation but before trial, Sal begins sending his armed security men over to...

2 . 1 Determine whether or not the following equations are linear or nonlinear, and state the reason for your answer. a . y y 5 y y = 0 b . y s i n y = 0 c . y y 2 = 0 d . y 5 t 2 y 3 y = 0 e . , y 3...

During the production of biodiesel, glycerin is a waste product and is collected by gravity separation because its SG (1.26) is much higher than that of biodiesel. Glycerin is withdrawn from the...

Collect two policies on EEO, sexual harassment, or family and medical leave from two different employers in your area. How are they similar (or different)? Which aspects of the policies support the...

Refer to the Journal of Civil Engineering and Construction Technology (Feb. 2013) study of bottom ash waste asphalt, Exercise 10.15. Recall that the researchers investigated the relationship between...

A projectile is launched from point A with the initial conditions shown in the figure. Determine the slant distance s which locates the point B of impact. Calculate the time of flight t. vo = 120 m/s...

The cylinder volume below the constant loaded piston has two compartments, A and B, filled with water, as shown in Fig. P3.212. A has 0.5 kg at 200 kPa and 150C and B has 400 kPa with a quality of...

Howard Schultz, longtime leader of Starbucks wrote in his business biography Pour a Little Love into It that he discouraged development of Starbucks frozen drinks like the Frappuccino. He felt...

Emerson Electric Company was founded in 1890 as a manufacturer of motors and fans. In 1993, Emerson marked its thirty-sixth consecutive year of improved earnings per share. On $8.2 billion sales, the...

Hello I need help answering these questions on the table; if you could run both scrips on apex that will help get the answers; here is the CREATE scrip...

Q1. A database consists of four tables T1, T2, T3 & T4. Underlined columns represent primary key relation in respective tables. Foreign key constraints are as shown with arrows. Text on arrows...

I am creating a database with an EER Diagram. This is the code that is created once it is forward engineered: SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0; SET...

/ * Company database mySQL data definition. Ordering of tables is important since a table can reference tables that are defined before. Since date type is not available in MySQL , create a new user...

-- ************************************************************* -- This script creates the database -- for Labs 4-7 based on OM (Order Management) database -- **REVISED by PRP to remove some orders...