SQL Server 选择总和的最大值

Question

当我运行这个选择时

SELECT      
     D.Product_ID p_id
    ,D.Green_Sheet_ID gs_id
    ,SUM (P.prepress_amt) amt

   FROM  GS_Prepress AS P INNER JOIN
                      GS_Data AS D ON P.green_sheet_id = D.Green_Sheet_ID

   WHERE 
    Product_ID ='194456'  
   GROUP BY D.Product_ID, D.Green_Sheet_ID

我明白了...

|p_id   | gs_id |amt      |
|-------|-------|---------|
|194456 | 5721  |33524.00 |
|194456 | 7484  |47524.00 |

我只想选择具有 max(gs_is) 的行，所以我只得到这个结果？

|p_id   | gs_id |amt      |
|-------|-------|---------|
|194456 | 7484  |47524.00 |

Answer 1

对结果进行排序，取TOP(1):

SELECT TOP(1)
    D.Product_ID p_id,
    D.Green_Sheet_ID gs_id,
    SUM (P.prepress_amt) amt
FROM
    GS_Prepress AS P
INNER JOIN
    GS_Data AS D ON P.green_sheet_id = D.Green_Sheet_ID
WHERE 
    Product_ID ='194456'  
GROUP BY
    D.Product_ID, D.Green_Sheet_ID
ORDER BY
    gs_id DESC