Why should NULLs in a relation be avoided as much as possible? Discuss the problem of spurious

Question:

Why should NULLs in a relation be avoided as much as possible? Discuss the problem of spurious tuples and how we may prevent it.

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Related Book For book-img-for-question

Fundamentals Of Database Systems

ISBN: 9780133970777

7th Edition

Authors: Ramez Elmasri, Shamkant Navathe

See More Books

Question Posted: Nov 09, 2021 01:16 AM

See More Questions

Discuss the problem of advertising clutter and how it is a problem in various media such as magazines, television and radio. What are some of the ways the media can address the clutter problem?
1) Discuss the problem of paradigms. That is, has Thaler et.al. developed their model far enough to have created a new paradigm? Does it continue to be only a relevant but case by case model? It is...
Why do spurious tuples occur in the result of joining the EMP_PROJ1 and EMPLOCS relations of Figure 15.5 (result shown in Figure 15.6)?
Data set: Daily saturated fat intakes (in grams) of 20 people Construct a cumulative frequency distribution and an ogive for the data set using six classes. Then describe the location of the greatest...
Jill Martin of Regina opened Martins Catering Service. As her accountant, analyze the transactions listed below and present the following information in proper form: 1. The analysis of the...
The owner of Sonata Company asked you to prepare a worksheet from the trial balance in Figure. Additional Data a/b. Ending merchandise inventory on December 31, $1,845. c. Office supplies used up,...
DE 19-21 The Institute of Management Accountants' Standards of Ethical Conduct for Management Accountants (Exhibit 19-15, page 776) require management accountants to meet standards regarding...
1. From a resource-based view, what resources and capabilities do Asian firms involved in the production of Amazon's Kindle have that US firms do not have? 2. What are the differences between the...
10.6 percent. a. What are the project's payback and discounted payback periods? b. What is the project's NPV? c. What is the project's PI? d. What is the project's IRR? a. The payback period of the...
From the data 1,4, 5, 3, 2, 5, 7, 3, 4, and 5, Poindexter created the following frequency table. What five things did he do wrong? f- 013589 f- 11223|-| 123457
Discuss attribute semantics as an informal measure of goodness for a relation schema.
State the informal guidelines for relation schema design that we discussed. Illustrate how violation of these guidelines may be harmful.
The Mercatus Center provides comparison information on the fiscal performance of state governments. For this case, access the Mercatus Center at https://mercatus.org . Required a. What is the...
1) Why do you believe that in recent years PE sponsors have increasingly chosen to buy debt in their distressed LBOs? 2) What are the pros and cons of this investment strategy? 3) What issues are...
Paper Street Soap Company Ltd conducts a business that makes luxury soaps. It operates a factory in Oyster Bay near Sydney. The factory contains a large amount of equipment that is used in the...
TRANSACTION ANALYSIS: Dartmouth Ties Corporation is a merchandising company that has been in operation for two years. The company sell high - end ties for men. They purchase their inventory from...
Using your knowledge of types of group influence and of subcultures, explain the potential impact on consumer behavior of Methodism's tightening of its ban on gay marriage and LGBTA clergy. Write in...
A language L over an alphabet is co-finite, if * \ Lis empty or finite. Let COFNFA = {(N) | N is a NFA accepting a co-finite language}. Show that COF NFA is decidable.
Match each definition with its related term by entering the appropriate letter in the space provided. Term Definitlon 1. Relevance A. The financial reports of a business are assumed to include the...
What is an access control list?
This exercise explores how exception handling affects pipeline design. The first three problems in this exercise refer to the following two instructions: Instruction 1...................Instruction 2...
In this exercise we compare the performance of 1-issue and 2-issue processors, taking into account program transformations that can be made to optimize for 2-issue execution. Problems in this...
This exercise explores energy efficiency and its relationship with performance. Problems in this exercise assume the following energy consumption for activity in Instruction memory, Registers, and...
What is Apple Companys strategy for success in the marketplace? Does the company rely primarily on customer intimacy, operational excellence, or product leadership? What evidence supports your...
Exercise 1 1 - 7 ( Algo ) Net present value and unequal cash flows LO P 3 Gomez is considering a $ 2 1 0 , 0 0 0 investment with the following net cash flows. Gomez requires a 1 2 % return on its...
a Campbell Inc. produces and sells outdoor equipment. On July 1, 2011. Campbell issued $40,000,000 a 10-year, 10% bonds at a market (effective) interest rate of 9%, receiving Cash of 548,601,480....

Why should NULLs in a relation be avoided as much as possible? Discuss the problem of spurious

Question:

Step by Step Answer:

NULL value means that no entry has been made into the column T...View the full answer

Fundamentals Of Database Systems

Students also viewed these Computer science questions