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[answered] Assignment 7: Due November 21. (1) Map (that is, transform/


Please answer the following assignments using drawing and as required..


Assignment 7: Due November 21.

 

(1) Map (that is, transform/convert) Figure 3-6 (b) (page 121) into relations. This figure shows ?Partial

 

specialization Rule? for VEHICLE as supertype and CAR and TRUCK as subtype. This figure is on page 119

 

(fig. 3-4b) in the 10th edition. You can use the study NOTES below. More specifically, use the notes ?d.

 

Relationship (supertype/ subtype?)

 

(2) Describe a relation in FIRST NORMAL FORM (1NF).

 

(3) Show a table that is NOT in 1NF.

 

(4) Show the above table by converting it to 1NF.

 

(5) Describe what a ?functional dependency? is. Describe what a ?partial functional dependency? is.

 

Show an example of a functional dependency by: Drawing a table with clearly marked primary key and a

 

functional dependency.

 

List the functional dependency with proper form (that is, A B)

 

In two/three sentences, explain what you showed means. That is describe, why the functional

 

dependency exists in your example.

 

(6) Describe what a ?transitive dependency? is.

 

Show an example of a transitive dependency by: Drawing a table with clearly marked primary key and a

 

transitive dependency.

 

List the transitive dependency with proper form (that is, A B)

 

In two/three sentences, explain what you showed is a transitive dependency.

 

(7) In your words, describe why any dependency is bad for a relation (i. e., table) or database.

 

(8) Describe what a determinant is.

 

(9) On page 179 of the text, examine the relation EMPLOYEE2 in Figure 4-23 (b). (NOTE: This diagram is

 

on page 181 of 10th edition). Bring this relation to 3NF. You must list the dependencies and the steps

 

you are performing for each stage.

 


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