What is the default MySQL JOIN behaviour, INNER or OUTER?

Question

So I\'ve been looking through the internet the last hour, reading and looking for the definitive answer to this simple question.

What is the default JOIN in MySQL?

Answer 1

These are all equivalent, and also equal to, CROSS JOIN.

There are some differences between using comma and [INNER | CROSS] JOIN syntax, which might be important when joining more tables. Pretty much all you need to know is described here in the MySQL JOIN documentation.