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Consider a MAIL_ORDER database in which employees take orders for parts from customers. The data requirements are summarized as follows:
a) The mail order company has employees, each identified by a unique employee number, first and last name, and Zip Code. b) Each customer of the company is identified by a unique customer number, first and last name, and Zip
Code.
c) Each part sold by the company is identified by a unique part number, a part name, price, and quantity in stock.
d) Each order placed by a customer is taken by an employee and is given a unique order number. Each order contains specified quantities of one or more parts. Each order has a date of receipt as well as an expected ship date. The actual ship date is also recorded.
1- Draw an ER diagram for the schema. Specify structural constraints on each relationship type.
2- Design the relational schema for this application.
3-Create tables in SQL for all the relations along with constraints.
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