Entity Relationship

Essay specific features

 

Issue:

Technology

 

Written by:

James G

 

Date added:

September 23, 2015

 

Level:

University

 

Grade:

A

 

No of pages / words:

2 / 416

 

Was viewed:

7250 times

 

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Essay content:

It also has the manufacturer-make, product-in-store, product-in-warehouse, and customer-order relationships. 1.1 Entities. This project focuses on the product (or merchandise) entity. Its attributes include item number, model, type, price and quantity. The item number distinguishes every item, and we choose it as the primary key of product entity...
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Its attributes include item number, model, type, price and quantity. The item number distinguishes every item, and we choose it as the primary key of product entity. Here quantity is a derived attribute, whose value can be calculated from the sum of item quantity at store and warehouse. Product can be divided into two disjoint subclass, laptop and desktop...
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