1. DATA MODEL AND ITS
BUSINESS USE
SURYA PRAKASH
ROLL NO 12

2. WHAT IS DATA MODEL
 Data model is a collection of conceptual tools
for describing data, data relationships, data
semantics, and consistency constraint
 A data model provides a way to describe the
design of a database at the
physical, logical, and view levels
 There are number of different data models
are as follow

3. TYPES OF DATA MODELS
 A collection of tools for describing
 data
 data relationships
 data semantics
 data constraints
 Entity-Relationship model
 Relational model
 Other models:
 object-oriented model
 semi-structured data models
 Older models: network model and
hierarchical modal

4. ENTITY- RELATIONSHIP MODEL
 The entity- relationship (E-R) data model
uses a collection of basics object called
entity and relationship among these object
 An entity is a thing or object in real world that
is distinguishable from other objects
 The entity- relationship model is widely used
in data base design

5. ENTITY-RELATIONSHIP MODEL
Example of schema in the entity-relationship model

6. RELATIONAL MODEL
 The relational model uses a collection of
tables to represent both data and the
relationships among those data
 Each table has multiple columns, and each
column has a unique name
 Tables are also known as relation

7. RELATIONAL MODEL Attributes
 Example of tabular data in the relational model
customer- customer- customer- account-
Customer-
name street city number
id
192-83-7465 Ram south Raipur A-101
019-28-3746 Suresh North Jaipur A-215
192-83-7465 Vijay avenue Pune A-201
321-12-3123 John Main Allahabad A-217
019-28-3746 Smith North Warangal A-201

8. SOME IMPORTANT TERMS
 TABLE –It consists of multiple columns
 RELATION-Tables are also known as relation
 TUPLE-In relational modal tuple is used to
refer to a row
 ATTRIBUTE- It refer to a column of table

9. OBJECT- BASED DATA MODEL
 Object- oriented programming (especially in
java, C++, C#) has become the dominant
software development methodology this led
to the development of an object oriented data
model that can be seen as extending the
E- R model
 The object relational data model combines
features of object oriented data model and
relational data model

10. SEMI STRUCTURED DATA MODEL
 The semi structured data model permits the
specification of data where individual data
item of the same type may have different
sets of attribute
 This is in contrast to the data model
mentioned earlier, where every data item of a
particular type must have the same sets of
attribute
 The Extensible Markup Language(XML)is
widely used to represent semi structured
data