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	<title>Assignment 1 </title>

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<br><br>

<p class="lesson">LESSON:&nbsp;&nbsp;&nbsp;

Assignment 1

</p>

<pre class="lpre">

You do not need to run any SQL statements to

answer these questions...

<b>Question 1.</b> What is an Entity?

<b>Question 2.</b>What is the purpose of a Primary Key?

<b>Question 3.</b>What does a NULL value represent?

- END -

</pre>

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

	<title>Assignment 1 Solution</title>

	<style>

	body {

	  	font-family: Arial, Helvetica, sans-serif;

  	}

  	h2 {

		color: maroon;

  	}

	.lesson {

		color: maroon;

		font-weight: bold;

	}

	.lpre {

		padding-left: 10px;

		color: #000033;

		font-family: Ariel, Helvetica, san-serif;

		font-size: 14pt;

		font-weight: normal;

	}

	</style>

</head>

<body>

<br><br>

<p class="lesson">LESSON:&nbsp;&nbsp;&nbsp;

Assignment 1 Solution

</p>

<pre class="lpre">

You do not need to run any SQL statements to

answer these questions...

<b>Question 1.</b> What is an Entity?

		An Entity is a person, place, or thing for which you wish to

		hold information.

<b>Question 2.</b>What is the purpose of a Primary Key?

		A Primay key uniquely identifies each Row in a table.

		The Primary Key is defined as any Column (or combination

		of columns) that can be used to uniquely identify a particular row.

<b>Question 3.</b>What does a NULL value represent?

		NULL means Unknown, Missing, or Not Applicable

		NULL does NOT mean Zero or Blank

- END -

</pre>

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<head>

	<title>Assignment 10</title>

	<style>

	body {

	  	font-family: Arial, Helvetica, sans-serif;

  	}

  	h2 {

		color: maroon;

  	}

	.lesson {

		color: maroon;

		font-weight: bold;

	}

	.lpre {

		padding-left: 10px;

		color: #000033;

		font-family: Ariel, Helvetica, san-serif;

		font-size: 14pt;

		font-weight: normal;

	}

	</style>

</head>

<body>

<p class="lesson">LESSON:&nbsp;&nbsp;&nbsp;

Assignment 10

</p>

<pre class="lpre">

PROBLEM:

A company, XYZ, Inc., has analyzed the data attributes that they

was to track in their database. They need your help to

organize the attributes into database tables and

develop the correct relationships between the tables.

Use the data attributes below to answer the questions

	Data attributes for the XYZ Inc.

	---------------------------------

	Department name

	Job Title

	Social security numbers (SSN) for their employees

	Employee name, address and phone number

	Employee department number and job code

	Salary for employee

	Job Description for employee

<b>Question 1.</b>   Create an Entity-Relationship diagram for

the entities required to model this data.

<b>Question 2.</b>   Apply the Normalization Guidelines to decide what columns

would go with each entity.

Express your answer in Relational Notation format.

Example...

   SOMETABLE(myid-PK, name, city)

- END -

</pre>

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</html>

<!DOCTYPE HTML>

<html>

<head>

	<title>Assignment 10 Solution</title>

	<style>

	body {

	  	font-family: Arial, Helvetica, sans-serif;

  	}

  	h2 {

		color: maroon;

  	}

	.lesson {

		color: maroon;

		font-weight: bold;

	}

	.lpre {

		padding-left: 10px;

		color: #000033;

		font-family: Ariel, Helvetica, san-serif;

		font-size: 14pt;

		font-weight: normal;

	}

	</style>

</head>

<body>

<p class="lesson">LESSON:&nbsp;&nbsp;&nbsp;

Assignment 10 Solution

</p>

<pre class="lpre">

PROBLEM:

A company, XYZ, Inc., has analyzed the data attributes that they

was to track in their database. They need your help to

organize the attributes into database tables and

develop the correct relationships between the tables.

Use the data attributes below to answer the questions

	Data attributes for the XYZ Inc.

	---------------------------------

	Department name

	Job Title

	Social security numbers (SSN) for their employees

	Employee name, address and phone number

	Employee department number and job code

	Salary for employee

	Job Description for employee

<b>Question 1.</b>   Create an Entity-Relationship diagram for

the entities required to model this data.

	<img src="http://profperrytest.com/wampwww/A_OracleSQL/Working_Files/asgn_10_db.jpg" alt="Image of ER diagram for XYZ, inc.">

<b>Question 2.</b>   Apply the Normalization Guidelines to decide what columns

would go with each entity.

Express your answer in Relational Notation format.

	EMPLOYEE (employee_id-PK, ssn, last_name, first_name, street, city, zip, phone, salary, dept_num-FK, job_code-FK)

	DEPARTMENT (dept_num-PK, department_name)

	JOB (job_code-PK, job_title, job_description)

- END -

</pre>

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