The next step is to select some nouns in your project description. For example,

Question

The next step is to select some nouns in your project description. For example, a project has invoices, invoice distributions, and suppliers as nouns. These nouns are entities, or tables, that would be used to create the E-R model. Then, the adjectives and verbs that describe the nouns would become the attributes, or columns.

Therefore, in the example that we considered, we might have the following entities and attributes:

Invoices

Invoice_Distributions

Suppliers

Using your knowledge of selecting entities and attributes, complete the following tasks for this week:

Review your project descriptions and come up with five entities and some attributes that describe the entities. Do not identify more than five attributes for each entity.

In a Microsoft Excel spreadsheet, define six columns (nouns) from the project description you submitted in W1 Assignment 3 that you consider key to your database. These will be the tables for the database. Then, in the rows for each column, define the attributes (adjectives).

You have taken your creative idea and started to move the nouns and adjectives you identified in a logical model—the E-R model. This will give you a working outline of the tables that will be created in the final script.

Invoices

Invoice_Distributions

Suppliers

# Invoice_id # Invoice_distribution_id # Supplier_id Invoice_num Invoice_distribution_line_num Name Invoice_type Line_type Address Supplier_id Invoice_id

Explanation / Answer

Since you have not provided details of the project you have chosen, I will explain with the help of an example. Suppose you are creating a Student Information System. The first thing you will need to store is student details. For example:

Student { Student_ID, Student_name, Address, Contact_number, Course_interested_in}

The student might be interested in pursuing a specific course. Therefore, you need to store details about the courses available. For example:

Course { Course_ID, Course_name, Faculty_ID, Duration, number_of_seats}

Now, a course is taught by a faculty. We need to store details of the faculties. For example:

Faculty { Faculty_ID, Name, Course_ID, contact_number}

Similarly identify the entities and attributed needed in your project and create the excel sheet.    

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