The CData JDBC Driver for Freshdesk 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 t.Priority, t.Status, t.DueBy, c.Name FROM Tickets t INNER JOIN Companies c ON t.CompanyId = c.Id

Left Join

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

SELECT t.Priority, t.Status, t.DueBy, c.Name FROM Tickets t LEFT JOIN Companies c ON t.CompanyId = c.Id