Hello,

As I know the MyISAM databases don't support the foreign key and references(generally the relationships with these).So why the book wrox php6
uses these keywords (foreign key and references) in the examples with MyISAM Databases?(for example in tryout in p.365).Sorry but i confused...

Thank you

Greetings,

You can get foreign keys to work on a MyISAM db, see the following article.

http://dev.mysql.com/tech-resources/...eign-keys.html

Hello useless,

In this article shows how to use foreign keys programmatically by using triggers.however in the book examples don't used triggers, only the assign of foreign key.why?