如何在sql server中显示多行作为单行？

Question

  

可能重复：
  How to write a SQL query to present values horizontally

这是我的疑问：

SELECT
            ROW_NUMBER() OVER
            (
            ORDER BY tblProductPackingHdr.bmr_ID
            )AS SLNo
            ,tblProductPackingHdr.bmr_ID
            ,tblProductPackDetails.pack+' '+MAX(tblUnit.unit_Type)+' * '+CAST(SUM(tblProductPackingFinishedHdr.qty-tblProductPackingFinishedHdr.loss_Qty)AS VARCHAR) AS Pack
        FROM 
            tblProductPackingHdr
            INNER JOIN tblProductPackingFinishedHdr ON tblProductPackingHdr.product_Packing_ID=tblProductPackingFinishedHdr.product_Packing_ID
            INNER JOIN tblProductPackDetails ON tblProductPackDetails.pack_detl_ID=tblProductPackingFinishedHdr.pack_detl_ID
            INNER JOIN tblUnit ON tblUnit.unit_ID=tblProductPackDetails.unit_ID
        GROUP BY 
            tblProductPackingHdr.bmr_ID
            ,tblProductPackDetails.pack

我得到了这样的输出

SLNo bmr_ID        Pack
1    1         450 Ml * 100
2    2         1 Ltr * 12
3    2         350 Ml * 8
4    2         450 Ml * 19
5    27        450 Ml * 44
6    27        670 Ml * 1040

我想像这样显示

SLNO   bmr_ID    Pack
----------------------
1      1         450 Ml*100
2      2         1 Ltr*12,350 Ml*8,450ml*19
3      27        450 ml*44,670 ml*1040

请帮助