Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement.

Using JSINQ, however, you can write similar SQL queries while programming in JavaScript. This means you now have a query language in JavaScript that you can use against arrays and DOM node lists.

An alternative - again, if supported - would be to create a view that works the same as the derived table, and use this in your query instead.