SQL Server选择最大总和

Question

当我运行这个选择

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

订购结果并采取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