Syntax:

<code>
FROM <component_reference> [[LEFT | INNER] JOIN <component_reference>] ...
</code>

The {{FROM}} clause indicates the component or components from which to retrieve records. If you name more than one component, you are performing a join. For each table specified, you can optionally specify an alias.

* The default join type is {{LEFT JOIN}}. This join can be indicated by the use of either {{LEFT JOIN}} clause or simply '{{,}}', hence the following queries are equal:

<code>
SELECT u.*, p.* FROM User u LEFT JOIN u.Phonenumber

SELECT u.*, p.* FROM User u, u.Phonenumber p
</code>

* {{INNER JOIN}} produces an intersection between two specified components (that is, each and every record in the first component is joined to each and every record in the second component). So basically {{INNER JOIN}} can be used when you want to efficiently fetch for example all users which have one or more phonenumbers.

<code>
SELECT u.*, p.* FROM User u INNER JOIN u.Phonenumber p
</code>