1. Data base System Concepts & Data Modeling
Chapter 1
Data base System Concepts & Data Modeling

2. Data

3. File Systems

4. Data Base Management System
DBMS is a collection of interrelated data and set of programs to access those data.

5. Various Data Base Mgt Systems

6. Disadvantages of File Systems
Data Redundancy and Inconsistency
Data Isolation
Integrity Problems
No Transaction support
No data sharing
Security Problems

7. Front End

8. Back End

9. Data Abstraction

10. Data Abstraction(Physical Level)
Rollno
Name
Marks

11. Data Abstraction(Logical Level)
Rollno
Name
Marks 1
Misha 22 2
Minu 34

12. Data Abstraction(View Level)
Rollno
Name 1
Misha 2
Minu

13. Instance
Data base changes over time as information is deleted and inserted.The collection of information stored in the database at a particular moment is called an Instance of Database.
Insert into student values(1,’misha’,99)

14. Schema
The overall design of the database is called as the database schema.

15. Schema

16. Database Languages SQL DDL DML CREATE INSERT DELETE DROP ALTER UPDATE
SELECT
TRUNCATE
RENAME

17. Data Defination Language
Create Table
Alter Table
Truncate
Rename table
Drop table

18. Data Manipulation Language
Insert
Select
Update
Delete

19. DataBASE USER’S
Application Programmer’s

20. Naïve User’s

21. Sophisticated User’s

22. Specialized User’s

23. Functions of DBA Schema Definition
Storage Structure and access method definition
Granting of Authorization for data access
Routine Maintenance.
Performance Tuning

24. Two Tier Architecture

25. Three Tier Architecture

26. Non Client Server