TABLE OF CONTENT
1. DETERMINE MAIN ENTITIES
3
2. DETERMINATION OF ATTRIBUTES AND PRIMARY KEY
4
3. ENTITY RELATIONSHIP DIAGRAM (ERD)
5
4. RELATIONAL SCHEMA
6
5. SAMPLE RECORD FOR EACH RELATION
7-8
6. SQL QUERIES
9 - 10
7. SQL QUERIES GENERATED RESULT
11 - 12
1
1. DETERMINE MAIN ENTITIES
There are four main entities found from context which is student, course, class and the
last one is trainer.
Entity student determined from context “Evertrue Innovation Solution Sdn. Bhd. offering
training courses to students from businesses and organizations of all sizes and at all
levels”.
Entity course determined from context “Evertrue Innovation Solution Sdn. Bhd. the type
of courses together with the duration offered by them to the students”.
Entity class determined from “the available time and date for each course offered by
Evertrue Innovation Solution Sdn. Bhd”.
Entity trainer determined from context “Evertrue Innovation Solution Sdn. Bhd has quite
number of trainer with different specialization to train the students depend on the type of
courses”.
2
2. DETERMINATION OF ATTRIBUTES AND PRIMARY KEYS
Entity
Attributes
Student
Student_ID (Primary Key)
Student_Name
Student_Age
Student_Address
Student_Email
Student_Company
Course
Course_ID (Primary Key)
Course_Name
Course_Duration
Course_Type
Class_Code (Foreign Key)
Trainer_ID (Foreign Key)
Class
Class_Code (Primary Key)
Class_Date_Time
Total_Class_Hours
Class_Location
Trainer
Trainer_ID (Primary Key)
Trainer_Name
Trainer_Telephone
Specialization
3
3. ENTITY RELATIONSHIP DIAGRAM (ERD)
-
BOLD WORDS = Primary Key
ITALIC WORDS = Foreign Key
4
4. RELATIONAL SCHEMA
Schema
Relations Item
Student
Student_ID (Primary Key), Student_Name, Student_Age,
Student_Address, Student_Email, Student_Company
Course
Course_ID (Primary Key), Course_Name, Course_Duration
Course_Type, Class_Code (Foreign_Key), Trainer_ID
(Foreign Key)
Class
Class_Code (Primary Key), Class_Date_Time,
Class_Location
Trainer
Trainer_ID (Primary Key), Trainer_Name,
Trainer_Telephone, Specialization
5
5. SAMPLE RECORDS FOR EACH RELATION
i)
Student
ii)
Course
iii)
Class
6
iv)
Trainer
7
6. SQL QUERIES
i)
Simple Query
ii)
Query for Sorting Results
iii)
Aggregate Function
8
iv)
Sub-Queries
v)
Alter Query
9
7. SQL QUERIES GENERATED RESULT
i)
Simple Query
ii)
Query for sorting results
iii)
Aggregate function
10
iv)
Subqueries
v)
Alter Query
Student table before executing Alter Query
Executing Alter Query
A new column named “DateOfBirth” successful added into the table by Alter Query
11