Notes for A.4.9 Database Segmentation - IB | RevisionDojo
A.4.9 Database Segmentation Notes
Definition
Database Segmentation
The process of dividing a database into smaller, more manageable parts based on a specific feature or criterion.
Importance of Segmenting a Database
Improved Performance: Smaller segments mean faster queries and transactions.
Enhanced Security: Sensitive data can be isolated in secure segments.
Scalability: Easier to manage and expand as the database grows.
Types of Segmentation
Horizontal Segmentation: Divides data rows based on a criterion.
Vertical Segmentation: Divides data columns based on usage.
Hybrid Segmentation: Combines both horizontal and vertical methods.
Example
Horizontal Segmentation:Customers in different regions stored in separate segments.
Vertical Segmentation: Frequently accessed columns stored separately from rarely used ones.
How Segmentation Works
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Definition
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What is database segmentation?
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Note
What is Database Segmentation?
DefinitionDatabase SegmentationThe process of dividing a database into smaller, more manageable parts based on a specific feature or criterion.
Think of it like organizing a library into different sections (e.g., fiction, non-fiction) based on genre.
Each segment contains data that shares a common characteristic.
AnalogyIt's like dividing your closet into sections for shirts, pants, and shoes - each section serves a specific purpose.
ExampleA customer database segmented by region would have separate segments for North America, Europe, and Asia.
