1. REVIEW OF THEORY
OF DATABASE
LESSON
01

2. LEARNING OBJECTIVES
● Identify and recall the theory of
database and its concepts;

3. • A database is a collection of logically
related data.
• Example: Personal information such as
name, address, birthday and gender
What is Database?

4. • A schema or a database schema is the
over-all design of a database.
What is a Schema?

5. • A database system is an automated system
that enables users to define, create,
maintain and control access to the
database.
What is a Database System?

6. Components of a DBMS Environment

7. • Users can define the database through a Data Definition
Language (DDL).
• Users can manipulate data through a Data Manipulation
Language (DML).
• DBMS can provide security system.
• DBMS can provide an integrity system.
• DBMS can provide a concurrency control system.
• DBMS can provide a recovery control system.
Different Facilities that DBMS provide

8. • One to One
Entity Relationships

9. • One to Many
Entity Relationships

10. • Many to One
Entity Relationships

11. • Many to Many
Entity Relationships

12. • A relational database is divided into logical units called table
which is composed of rows and columns of data.
What is a Relational Database?

13. • What is a relation?
o A relation is composed of rows and columns of
data.
• What is an attribute?
o In relational database, the table columns
correspond to attributes.
Other Database Concepts

14. • What is a domain?
o A domain refers to a set of valid atomic values
for a given attribute.
• What is a primary key?
o A primary key refers to an attribute or field that
serves as a unique identifier for a particular
record within a relation.
Other Database Concepts

15. REFERENCES
● Ramez E. and Shamkant N. Fundamentals of Database Systems.
7th Edition. 2016
● C.J. Date. An Introduction to Database Systems. 8th Edition.
Addison Wesley
● http://www.ebooks-for-all.com/bookmarks/detail/Database-
Management-Systems/onecat/0.html
● http://www.freebookcentre.net/Database/Free-Database-
Systems-Books-Download.html
● https://people.inf.elte.hu/miiqaai/elektroModulatorDva.pdf