1. Royal University of Phnom Penh
ដដដដដដដដដដដ Mr Kean Tak
ដដដដដដដដដដដ
Member Group
1. Chan Pisey
2. Chhann Seakquech
3. Bun Seng
4. Choun Mengcheng
5. Bun Panha
6. Choun Mengcheng
7. Chheang Chhayheng
8. Chea Sovathana
9. Chea Vuthu

2. I.
Content
Storing and Retrieving Data
II. Manipulating Data and Generating Report
III. Database Administration
IV. Popular Database Management Systems
V. Special –Purpose Database Systems
VI. Selecting a Data Management System

3. Storing and Retrieving Data
When an application program request data
from DBMS, the application program
follows a logical access path
When the DBMS goes to a storage device
to retrieve the requested data, it follows a
path to the physical location (physical
access path) where the data is stored

4. Logical and Physical Access Paths

5. Manipulating Data and
Generating Reports
 Data manipulation language (DML): the
commands that are used to manipulate the data
in a database
 Structured Query Language (SQL): adopted by the
American National Standards Institute (ANSI) as the
standard query language for relational databases
Once a database has been set up and loaded
with data, it can produce reports, documents,
and other outputs

6. Database Administration
 DBA
 Works with users to decide the content of the database
 Works with programmers as they build applications
to ensure that their programs comply with database
management system standards and conventions
 Data administrator:
 Responsible for defining and implementing
consistent principles for a variety of data issues

7. Popular Database Management
Systems
Popular DBMSs for end users include
Microsoft’s Access and Corel’s Paradox
 The complete database management software market
includes databases by IBM, Oracle, and Microsoft
Examples of open-source database systems:
PostgreSQL and MySQL
Many traditional database programs are now
available on open-source operating systems

8. Special-Purpose Database Systems
Some specialized database packges are used .
for specific purposes or in specific industries:
Rex-book from Urbanspoon
Morphbank(www.morphbank.net):
Allows researchers to continually update and expand a
library of more than 96.000 biological images

9. Selecting a Database Management
System (continued)
Important characteristics of databases to
consider
 Database size
 Database Cost
 Database users
 Performance
 Integration
 Vendor

10. ដដដដ
ដដដដ