GROUP BY 不能比较或排序 text、ntext 和 image 数据类型，除非使用 IS NULL 或 LIKE 运算符。

         E11_Remarks是text，不能group by ，用方法cast。   

         select  E11_PurchaseOrderID ,

                    E11_ItemID,

                    E11_ItemModel,

                    sum(E11_Qty) as E11_Qty,

                    E11_Manufacturer,

                    E11_WHID,                   

                    E11_UnitPrice,

                    E11_InStoreDate,

                    cast(E11_Remarks as varchar(4000)) as E11_Remarks,

                    E11_RsvedFld

                   

           from     E11_ServiceItemStore 

                   

           group by E11_PurchaseOrderID,

                    E11_ItemID,

                    E11_ItemModel,

                    E11_Manufacturer,

                    E11_WHID,                   

                    E11_UnitPrice,

                    E11_InStoreDate,

                    cast(E11_Remarks as varchar(4000)),

                    E11_RsvedFld