The Developer

The Relational Database

vs

HOW TO DO IT

RIGHT!

#DevDaySL @gogula

About me

MVP:SQL Server

MCSE:Business Intelligence

Author:Chapter 57

Technical Architect

Gogula Aryalingam

6

2011

#DevDaySL @gogula

Agenda

Defensive Programming

Do it right:

Best Practices

Database Design

Documenting

Indexing considerations

Utility objects

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What’s wrong with this picture

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Here’s what…

Keys/Uniqueness

Data TypesNormalizatio

nNaming Convention

Constraints

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A better design

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Database design

Code is

Agile Database

is brittl

e

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Programming defensively

2. Modularize into fully testable and fully tested code

1. Define & understand assumptions

4. Reuse code when feasible*

3. Test as many use cases as possible

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Indexing for performance

Unique, narrow, static field

A clustered index on a heap (table) is a good idea

Leave small tables as is

Non-clustered indexes on fields used inJOINs and WHERE predicates

Do not index every field Index based on usage

Consider filtered indexesConsider included indexes

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Use utility objects

The Numbers table, for set based:

String sorting Extraction of distinct characters

Generate time ranges or time slices

Find IDENTITY gaps

Even something trivial like generating an IP range

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Document your code

Document through code

Document the Why apart

from the What

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Do we have time for a demo?

Defensive database

programming

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Questions?

During the

break

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THANK YOU

#DevDaySL @gogula

MVP:SQL Server

dbantics.wordpress.comwww.sqlserveruniverse.com

gogulaa@gmail.com

Gogula AryalingamTechnical Architect

@gogula

lk.linkedin.com/in/gogula

Contact