The SAP Hybris C4C 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 AccountCollection.AccountName, AccountNotesCollection.Text FROM AccountCollection, AccountNotesCollection WHERE AccountCollection.ObjectID = AccountNotesCollection.ParentObjectID

Left Join

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

SELECT AccountCollection.AccountName, AccountNotesCollection.Text FROM AccountCollection LEFT OUTER JOIN AccountNotesCollection ON AccountCollection.ObjectID = AccountNotesCollection.ParentObjectID