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SitePoint Courses > PHP Live > Database Design: Complex Relationships

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Lesson 9: Database Design: Complex Relationships

Today we’ll expand our database structure even further, by exploring many-to-many

relationships.

Today’s Tasks

Watch a video: Welcome to Day 91.

Watch a video: Simple Relationships2.

Read an article: Many-to-many Relationships

The correct way to represent a many-to-many relationship is to use a lookup table.

This is a table that contains no actual data, but which lists pairs of entries that are

related.

3.

Join a Discussion: Challenge: Update joke database to include categories

Using everything you just learned about many-to-many relationships, try adding the

necessary structure to your joke database to group your jokes into categories. Don’t

4.

Lessons

Week 1Lesson 1: PHP & MySQL

Lesson 2: Your First Database

Lesson 3: Introducing PHP

Lesson 4: PHP Language

Lesson 5: Recorded Q&A

Week 2Lesson 6: Displaying MySQL Content

Lesson 7: Adding and Removing

Content with PHP

Lesson 8: Database Design: Multi-table

Queries

Lesson 9: Database Design: Complex

Relationships

Lesson 10: Recorded Q&A

Week 3Lesson 11: Structured PHP

Programming

Lesson 12: A Content Management

System (#1)

Lesson 13: A Content Management

System (#2)

Lesson 14: Sessions and Access

Control

Lesson 15: Recorded Q&A

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PHP Live Lesson 9 "Database Design: Complex Relationships" http://courses.sitepoint.com/php-live/lesson/9

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worry about writing any PHP code to handle this just yet—we’ll tackle that next

week.

That’s all for Lesson 9! Next up is Recorded Q&A.

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PHP Live Lesson 9 "Database Design: Complex Relationships" http://courses.sitepoint.com/php-live/lesson/9

2 sur 2 14/12/2010 16:37