The ActCRM 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 t.Subject, t.Details, p.CompaniesAggregate, p.StartTime FROM Activities t Inner JOIN ContactActivities p ON t.Id = p.ContactId

Left Join

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

 SELECT t.Subject, t.Details, p.CompaniesAggregate, p.StartTime FROM Activities t LEFT JOIN ContactActivities p ON t.Id = p.ContactId