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Data Modeling Tutorial

Data modeling is the act of exploring data-oriented structures. When building a database, data modeling implies the creation of a model for data within that database. Data models can be used for a variety of purposes, from high-level conceptual models to physical data models. author, Gavin Powell, covers topics such as normalization and denormalization for relational data modeling, fact dimensional structures for data warehouse data modeling, and basic object data modeling for object databases. Powell also examines useful web sites and vendor software, such as Oracle database, for finding data modeling information. To being learning today, simply click on one of the Data Modeling lessons.


Prerequisites for this Course
About this Course
Where to Find Documentation
Samples and Example Data Models Part pt. 1
Samples and Example Data Models Part pt. 2
A Relational Database Modeling Tool
ERWin: Changing Physical Structure
ERWin: Generating Scripts

The History of Data Modeling

What is a Data Model?
Types of Data Models
The Evolution of Data Modeling
File Systems
Hierarchical Databases
Network Databases
Relational Databases
Object Databases
Object-Relational Databases
The History of the Relational Database

Tools for Data Modeling

Entity Relationship Diagrams
Using ERWin Part pt. 1
Using ERWin Part pt. 2
Using ERWin Part pt. 3
Modeling in Microsoft Access
The Parts of an Object Data Model
Basic UML for Object Databases
Building Class Structures
Other UML Diagrams

Introducing Data Modeling

The Relational Data Model
The Object Data Model
The Object-Relational Data Model
Data Warehouse Data Modeling
Client-Server Versus OLTP Databases
Available Database Engines

Relational Data Modeling

What is Normalization?
Normalization Made Simple
Relational Terms and Jargon
1st Normal Form
Demonstrating 1st Normal Form
2nd Normal Form
Demonstrating 2nd Normal Form
3rd Normal Form
Demonstrating 3rd Normal Form
4th and 5th Normal Forms
Primary/Foreign Keys/Referential Integrity
The Traditional Relational Database Model
Surrogate Keys and the Relational Model

Object Data Modeling

The Object-Relational Database Model
Relational Versus Object Models
What is the Object Data Model?
What is a Class?
Again - a Class and an Object
What is an Attribute?
What is a Method?
The Simplicity of Objects
What is Inheritance?
What is Multiple Inheritance?
Some Specifics of the Object Data Model

Data Warehouse Data Modeling

The Origin of Data Warehouses
Why the Relational Model Fails
The Dimensional Data Model Part pt. 1
The Dimensional Data Model Part pt. 2
Star Schemas and Snowflake Schemas

Getting Data from a Database

What is Structured Query Language (SQL)?
The Roots of SQL
Changing Data
Changing Metadata
What is ODQL?

Tuning a Relational Data Model

Normalization Versus Denormalizatrion
Referential Integrity Part pt. 1
Referential Integrity Part pt. 2
Alternate Keys
What is an Index?
Indexing Considerations
Too Many Indexes
Composite Indexing
Which Columns to Index?
Index Types
Match Indexes to SQL Code
Types of Indexing in Detail pt. 1
Types of Indexing in Detail pt. 2
Where Index Types Apply
Undoing Normalization
What to Look For?
Undoing Normal Forms
Some Good and Bad Tricks Part pt. 1
Some Good and Bad Tricks Part pt. 2

Tuning a Data Warehouse Data Model

Star Versus Snowflake Schemas
Dimensional Hierarchies
Specialized Data Warehouse Toys

Other Tricks

RAID Arrays and Striping
Standby Databases

Wrapping it Up

Some Available Database Engines
The Future: Relational or Object?
What You Have Learned


About the Author

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