How to write a sub query in AX 2009 ?

select I.ItemId, I.ItemName, I.ItemGroupId, I.ItemType, I.Aur_ProjId,

       M.UNITID, M.PRICE as Rate,

       S.INVENTSIZEID as Size,C.INVENTCOLORID as Color,

       (select TOP 1 T.CONFIGID from ConfigTable T where I.ITEMID = T.ITEMID ) as Configuration

from INVENTTABLE I 

inner join INVENTTABLEMODULE M  on I.ItemId = M.ItemId and I.DATAAREAID = M.DATAAREAID