Question Details

(Solved) Review Questions What is data normalization? Why is it required? What is the main purpose of data de-normalization? What are the categories of data


Hello, How are you? check the attachment and let me if you more information. Thank you

Review Questions What is data normalization? Why is it required? What is the main purpose of data de-normalization? What are the categories of data models? Explain them briefly. What is data independence? Please have some exercises of writing SQL scripts. Go through the ER model again. Try to draw an ER model for a real-world database. Explain briefly the three-schema architecture. Why was it proposed? Consider the relational database of Figure 1. Give an expression in the relational algebra to
express each of the following queries:
a. Find the names of all employees.
b. Find the names of all employees who live in city “Miami”.
c. Find the names of all employees whose salary is greater than $100,000.
d. Find the names of all employees who live in “Miami” and whose salary is greater than
$100,000.
employee (person_name, street, city)
works (person_name, company_name, salary)
company (company_name, city)
Figure 1

 


Solution details:
STATUS
Answered
QUALITY
Approved
ANSWER RATING

This question was answered on: Sep 05, 2019

PRICE: $15

Solution~000200115061.zip (25.37 KB)

Buy this answer for only: $15

This attachment is locked

We have a ready expert answer for this paper which you can use for in-depth understanding, research editing or paraphrasing. You can buy it or order for a fresh, original and plagiarism-free copy from our tutoring website www.aceyourhomework.com (Deadline assured. Flexible pricing. TurnItIn Report provided)

Pay using PayPal (No PayPal account Required) or your credit card . All your purchases are securely protected by .
SiteLock

About this Question

STATUS

Answered

QUALITY

Approved

DATE ANSWERED

Sep 05, 2019

EXPERT

Tutor

ANSWER RATING

GET INSTANT HELP/h4>

We have top-notch tutors who can do your essay/homework for you at a reasonable cost and then you can simply use that essay as a template to build your own arguments.

You can also use these solutions:

  • As a reference for in-depth understanding of the subject.
  • As a source of ideas / reasoning for your own research (if properly referenced)
  • For editing and paraphrasing (check your institution's definition of plagiarism and recommended paraphrase).
This we believe is a better way of understanding a problem and makes use of the efficiency of time of the student.

NEW ASSIGNMENT HELP?

Order New Solution. Quick Turnaround

Click on the button below in order to Order for a New, Original and High-Quality Essay Solutions. New orders are original solutions and precise to your writing instruction requirements. Place a New Order using the button below.

WE GUARANTEE, THAT YOUR PAPER WILL BE WRITTEN FROM SCRATCH AND WITHIN YOUR SET DEADLINE.

Order Now