MySQL JOIN Abuse? How bad can it get?

Question

I\'ve been reading a lot about Relational Databases using many JOIN statements on every SELECT. However, I\'ve been wondering if there\'s any performance problem on the long run

Answer 1

If the data is 1 <-> 1, and you will not have many null fields, dont over normalize. You can still specify the fields required ("most used data") in the select statements.