The Adapter supports standard SQL joins like the following examples.

Inner Join

An inner join selects only rows from both tables that match the join condition:

SELECT c.FirstName, c.LastName, cp.Email, cp.Phone FROM ContactPersons cp INNER JOIN Contacts c ON cp.ContactId = c.Id

Left Join

A left join selects all rows in the FROM table and only matching rows in the JOIN table:

 SELECT c.FirstName, o.LastName, cp.Email, cp.Phone FROM ContactPersons cp LEFT JOIN Contacts c ON cp.ContactId = c.Id