Question 1:

Ashton wants to store the following data about S&S's purchases of inventory:
item number
date of purchase
vendor number
vendor address
vendor name
purchase price
quantity purchased
employee number
employee name
purchase order number
description
quantity on hand
extended amount
total amount of purchase

REQUIRED

a. Design a set of relational tables to store this data. Do all of the data items need to be stored in a table? If not, which ones do not need to be stored, and why do they not need to be stored?

b. Identify the primary key for each table.

c. Identify the foreign keys needed in the tables to implement reference.

Question 2:

You want to extend the schema shown in Table 4-16 to include information about customer payments. Some customers make installment payments on each invoice. Others write a check to pay for several different invoices. You want to store the following information:

amount applied to a specific invoice
cash receipt number
customer name
customer number
date of receipt
employee processing payment
invoice payment applies to
total amount received

REQUIRED
a. Modify the set of tables in Table 4-16 to store this additional data.
b. Identify the primary key for each new table you create.
c. Implement your schema using any relational DBMS package. Indicate which attributes are primary and foreign keys, and enter sample data in each table you create.

Question 3:

Create relational tables that solve the update, insert, and delete anomalies in Table 4-17.

Question 4:

Create relational tables that solve the update, insert, and delete anomalies in Table 4-18.