left join SM_SOLine soline on soline.SO=so.ID and soline.DocLineNo=(select MAX(DocLineNo) from SM_SOLine where so=so.ID)left join SM_SOLine soline on soline.SO=so.ID a
left join SM_SOLine soline on soline.SO=so.ID and soline.DocLineNo=(select MAX(DocLineNo) from SM_SOLine where so=so.ID)left join SM_SOLine soline on soline.SO=so.ID a