The CData Excel Add-In for SAP Concur 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 ListItems.Name, Lists.Name FROM ListItems, Lists WHERE ListItems.ListID=Lists.ID

Left Join

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

SELECT ListItems.Name, Lists.Name FROM Lists LEFT OUTER JOIN ListItems ON ListItems.ListID=Lists.ID