Question: Explain the difference between a candidate key and the identifier of an entity type.

Explain the difference between a candidate key and the identifier of an entity type.

Step by Step Solution

★★★★★

3.36 Rating (159 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

In database design both candidate keys and identifiers play important roles in uniquely identifying entities within a relational database However they ... 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 Systems Analysis And Design 12th Questions!

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...

What is the difference between a candidate key and the primary key for a given relation? What is a superkey?

Explain the difference between a Type I error and a Type II error.

Explain the difference between a candidate key and foreign key

Explain in approximately one paragraph why the requirements analysis phase of the database lifecycle is so important. Include the type of information you typically want to discover and the types of...

30. Suppose you want to show that a person can have multiple degrees. Would each of the following two ER diagrams get the job done? Why or why not? What is the difference? PON PERSON Please read the...

Petrie's Electronics Case Homework: Petrie's Electronics Case, Chapter 7, Questions 7-49. Please see rubric below. There are two parts to the homework Write an unambiguous definition for each...

part one part two part three Introduction to database please, answer the all questions. Module 3: Norm alis atio n Module Q uestio ns Question 1 Discuss the following terms from...

What would be the domain of the attribute County _ name in the state of Texas? 2 . Distinguish between a Simple attribute Composite attribute Single - valued attribute Multi - valued attribute Give...

e. Which entity type functions as a superclass in more than one specialization? f. How many Superclass/subclass(SC/sc) relationships appear in the ER diagram? g. How many specializations appear in...

Write a paper in which address the following: Discuss specific ways the Protestant Reformation affected the English New World. Identify individuals who were key players in the Protestant Reformation...

A wire 25.0 cm long lies along the z-axis and carries a current of 9.00 A in the +z-direction. The magnetic field is uniform and bas components Bx = -0.242 T, By = -0.985 T, and Bz = -0.336 T. (a)...

Christie, Incorporated, has identified an investment project with the following cash flows. year one $ 9 9 0 year two $ 1 , 2 2 0 year three $ 1 , 4 4 0 year four $ 2 , 1 8 0

How many respondents are included in this chi-square analysis?

Explain the server-based architecture.

Explain the mobile application architecture.

Distinguish between the two-tier, three-tier, and n-tier client server architectures.

Claymore Corp. has the following information about its standards and production activity for September. The controllable variance is: Actual total factory overhead incurred $ 35,300 Standard factory...

Exercise 1 4 - 4 ( Algo ) Uncertain Future Cash Flows [ LO 1 4 - 4 ] Lukow Products is investigating the purchase of automated equipment that will save $ 1 1 0 , 0 0 0 each year in direct labor and...

What is the treatment of the following items in connection with the retail inventory method? a. Purchase discounts b. Purchase returns c. Purchase allowances