1. Instructor Information: Mark Jamil questions@markjamil.com
ITS 180: Database Design
Instructor Information: Mark Jamil

2. Real ER Diagram
Here is the ER diagram for a fairly small application known as Drupal.

3. Assignment 1: OK solution
studenttID
INT: Primary Key, Not Null, Unsigned, Auto-Increment
firstName
Varchar(255)
lastName
middleName
streetAddress
cityName
zipCode
INT
phoneNumber
dateOfBirth
DATE
ssn
facultyID
INT: Primary Key, Not Null, Unsigned, Auto-Increment
firstName
Varchar(255)
lastName
middleName
streetAddress
cityName
zipCode
INT
phoneNumber
dateOfBirth
DATE
ssn
guardianID
Foreign Key
studenttID
relationship
Varchar(255)
facultyID
Foreign Key
specializationID
guardianID
INT: Primary Key, Not Null, Unsigned, Auto-Increment
firstName
Varchar(255)
lastName
middleName
streetAddress
cityName
zipCode
INT
phoneNumber
dateOfBirth
DATE
ssn
specializationID
INT: Primary Key, Not Null, Unsigned, Auto-Increment
specialization
Varchar(255)

4. Assignment 1: Better Solution
roleID
INT: Primary Key, Not Null, Unsigned, Auto-Increment
roleName
Varchar(255)
roleDescription
cityID
INT: Primary Key, Not Null, Unsigned, Auto-Increment
cityName
Varchar(255)
zipCode
INT
personID
INT: Primary Key, Not Null, Unsigned, Auto-Increment
firstName
Varchar(255)
lastName
middleName
streetAddress
cityID
Foreign Key
phoneNumber
INT
dateOfBirth
DATE
ssn
INT (unique key)
roleID
studenttID
Foreign Key
relationship
Varchar(255)
personID
Foreign Key
specializationID
specializationID
INT: Primary Key, Not Null, Unsigned, Auto-Increment
specialization
Varchar(255)
Description
Blob

5. Review: Setting up your VM
Install VirtualBox
Create a guest machine
Install Debian (we are using version 8)
Do not install the user interface options
Edit repository list at /etc/apt/sources.list
Add the following servers to the list: deb jessie main contrib non-free deb-src jessie main contrib non-free
Comment out the cdrom and the other servers
Remember to do an apt-get update and apt-get upgrade
Install MySQL
apt-get install mysql-server
Configure MySQL and users to allow remote access
Edit /etc/mysql/my.cnf
Change the Bind-Address FROM TO

6. Setting up a remote MySQL user
Log into mysql by typing mysql –u username –p
Inside of the mysql shell add a new user using the following command:
CREATE USER IDENTIFIED BY ‘password’;
GRANT ALL ON *.* TO
Remember to restart the service by typing service mysql restart
Install MySQL Workbench on you actual computer and connect to your SQL server. You will need the VM ip address.
Your server IP address can be found by typing: ifconfig

7. Quiz 2
Name three possible table relationships in a database (aka cardinalization types)?
In general, what is the difference between Char and Varchar?
What is the difference between a Primary Key and a Foreign Key?
What is a Master Table and why do we use them?
What is a Transition (or Associative) Table and why do we use them?

8. Quiz 2: #6
What is the result of the following SQL command? (See table below)
SELECT CustomerID, CustomerName  FROM Customers  WHERE Country = ‘USA’ OR Country = ‘Sweden’ ;
CustomerID
CustomerName
Address
City
PostalCode
Country 1
Alfreds Futterkiste
Obere Str. 57
Berlin
12209
Germany 2
Ana Trujillo
Avda. de la Constitución 2222
México D.F.
05021
Mexico 3
Marcus Smith
Mataderos 2312
05023
USA 4
Michael Durant
120 Hanover Sq.
London
WA1 1DP UK 5
Jojo Snabbköp
Berguvsvägen 8
Luleå S
Sweden

9. Assignment 2: Journeyman Database
Update your university database from assignment #1 to include the following new data.
For all people, we need to collect information about their gender, date of birth, and disabilities.
Change the name of the “specialization” table to “departments”
Departments offer courses
Each course can be offered more than once per semester
A course must have a teacher (faculty)
A course may have many students
A student can register for many courses
At the end of each semester, the teacher must submit a grade for each student.

10. Intro to SQL Structured Query Language
SQL is a scripting language designed specifically for database server.
You can type SQL commands inside the MySQL shell or inside the MySQL Workbench query tool.
ER diagrams can be translated to SQL commands by exporting them inside MySQL workbench.
The 4 most frequently used SQL commands are variations of:
Select – used to look up data in the database
Insert – inserts new records (or rows) into the database
Update – used to change the values inside a record (or row)
Delete – removes values from a record (or row) and can be used to completely delete a record

11. Intro to SQL continued
To access data in more than one table, you sometimes need to write more than one SQL command.
You can embed one SQL command into another. Some people call statements like this “nested statements” while others call them “subqueries.”
For instance, you can retrieve a bunch of user ID’s from one table and use the resultant ID’s to look up specific data for those ID’s in another table.
Example:
SELECT salary FROM wages WHERE userID = ( SELECT userID FROM employees
WHERE status = ‘current‘ )