The document discusses data modeling and database characteristics, data centers, and data modeling. It provides information on: 1) Factors to consider when building a database including data content and cost, user access and data structure, and physical data organization and location. 2) What a data center is and its purpose of housing mission-critical database servers and systems in a climate-controlled building. 3) The two types of designs needed for building a database - logical design showing an abstract data structure and physical design optimizing performance and costs. It also discusses data models, enterprise data modeling using ER diagrams, and their purposes.

1. Royal University of Phnom Penh
MIS ដដដដដដដដដដដដដដដដដដដ
ដ
ដ Mr Kean Tak
Member
Group
1. Ny Rachakna 6. Ly Limkri
2. Ngin Visal 7. Ly Sotharith
3. Orm SovannTara 8.MengChheng
4. My Poleak 9. Ngim Ratana
5. Loy Sakvanna 10.Nhem Ratbophea

2. Content
I.Data Modeling and
Database Characteristics
II.Data Center
III.Data Modeling

3. Data Modeling and the
Database Characteristise
When building a database, an organization must consider:
Content:
What data should be collected and at what cost?
Access:
What data should be provided to which users and when?
Logical structre:
How should data be arranged so that it makes sense
to a given user?
Physical
organization: data be physically located?
Where should

4. Data Center
Climate-controlled building or set of buildings that:
House database servers and the systems that deliver
mission-critical information and services.
Traditional data centers
Consist of warehouses filed with row upon row of
server racks and powerful cooling systems

5. Data Modeling
Building a database requires two type of
designs
Planned data redundancy
Data Model
Enterprise data modeling
Entity-relationship(ER) diagrams

6. Data Modeling
Building a database requires two types of designs
Logical design:
shows an abstract model of how the data should be
structured and arranged to meet an organization’s
information needs
Physical design
starts from the logical database design and fine-
tunes it for performance and cost considerations

7. Data Modeling
Data Model
a diagram of data entities and their relationships
Enterprise data modeling
Starts by investigating the general data and information
needs of the organization at the strategic level
Entity-relationship(ER) diagrams
 data models that use basic graphical symbols to
show the organization of and relationships between data

8. The end
Thank You