Question

我有2个表，其中tblProduct和tblStock

tblProduct

ProdName    Price
P8          234
S7          234
M8          234
MD8oz       234
TO8         306
TO8JP       354
LR8         354
GBB8        354
GTF8        354
SS8         354
MD12        340
P750        322
S750        322
MD750       322
P300        132
S300        132
M300        132
MD NEON300  132
1.25L       228
CANS 250ML  348
CANS 330ML  552
TO355       585
LR330X12    210
G350        576
G500        760
SSE300X24   444
SSE300X12   222
PW350       254
PW500       230
PW1L        220

tblstock

ProdName    Quantity   INdate                    PriceperQty      TranStatus
M300         2         2018-11-07 23:46:05.800   132              IN
M300         2         2018-11-08 11:23:34.227   132              OUT
P300         23        2018-11-08 16:52:01.260   132              IN
MD12         12        2018-11-08 16:52:10.147   340              IN
TO8JP        3         2018-11-08 16:52:18.843   354              IN
SSE300X24    13        2018-11-08 16:52:28.587   444              IN
P8           43        2018-11-08 16:52:37.237   234              IN
1.25L        21        2018-11-08 16:52:43.843   228              IN
P8           32        2018-11-08 16:52:50.050   234              IN
S7           43        2018-11-08 16:52:54.900   234              IN
S7           32        2018-11-08 16:53:07.460   234              IN
P8           23        2018-11-08 16:53:19.020   234              IN

我想从这两个表中产生如下结果。

Answer 1

您可以尝试使用ROW_NUMBER窗口函数为tblstock表创建行号。然后使用条件聚合函数进行枢轴操作。

SELECT ProdName,
       [1st load],
       [2st load],
       [3st load],
       [4st load],
       price,
       (([1st load]+[2st load] +[3st load]+[4st load]) * price) 'Total'
FROM (
    SELECT  t1.ProdName, 
            MAX(CASE WHEN t2.rn = 1 then t2.Quantity ELSE 0 END) '1st load', 
            MAX(CASE WHEN t2.rn = 2 then t2.Quantity ELSE 0 END) '2st load',
            MAX(CASE WHEN t2.rn = 3 then t2.Quantity ELSE 0 END) '3st load',
            MAX(CASE WHEN t2.rn = 4 then t2.Quantity ELSE 0 END) '4st load',
            t1.Price
    FROM tblProduct t1 
    LEFT JOIN (
        SELECT *,ROW_NUMBER() over(partition by ProdName order by INdate desc) rn
        FROM tblstock
    ) t2 on t1.ProdName = t2.ProdName  
    GROUP BY  t1.ProdName,t1.Price
)t1

请帮助Visual Studio c＃

1 个答案: