1.) Describe the use of nulls databases
Assignment: Problem # 3 from Chapter # 6.
Normalize a set of data to 3rd normal form by creating relational schemas, dependency diagrams
and an Entity Relationship Diagram (crowâ€™s foot notation).
For this lab, complete problem # 3 in Chapter 6. Be sure to complete each letter (a thru d) for the
problem. The ERD for letter d must be completed with the use of Microsoft Visio. Attach all files to
a submission to the drop box for Lab # 03.
(1) Relational schema is defined in section 4.1.2 in chapter 4 of the textbook.
(2) Dependency diagram is defined in section 6.3.1 in chapter 6 of the textbook.
(3) An example of a crowâ€™s foot ERD can be found in chapter 4, figure 4.35.
(4) Microsoft Visio is available to you in VLABS or you may decide to obtain the software for
your own personal use. Microsoft Visio software is available free of charge through Penn
Stateâ€™s membership in DREAMSPARK (formerly MSDNAA). If you are interested in obtaining
your own free copy of Visio, please refer to the file Dreamspark under Lesson 01:
Introduction Getting Started.
3.3. Using the INVOICE table structure shown in Table P6.3 do the following:
a. Write the relational schema, draw its dependency diagram, and identify all dependencies, including all partial and transitive dependencies. You can assume the table does not contain repeating groups and that an invoice number references more than 1 product. (Hint: This table uses a composite primary keys.)
b. Remove all partial dependencies, write the relational schema, and draw the new dependency diagrams. Identify the normal forms for each table structure you created.
c. Remove all transitive dependencies, write the relational schema, and draw the new dependency diagrams. Also identify the normal forms for each table structure you created.
d. Draw the Crowâ€™s Foot ERD.
Study Acers provides students with tutoring and help them save time, and excel in their courses. Students LOVE us!No matter what kind of essay paper you need, it is simple and secure to hire an essay writer for a price you can afford at StudyAcers. Save more time for yourself. Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.
You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.Read more
Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.Read more
Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.Read more
Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.Read more
By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.Read more