Question

DECLARE @testTable TABLE (OrderDate date, StoreType int, Fruits int, Vegetables int, eggs int)

INSERT INTO @testTable VALUES(getDate(), 1, 4, 6, 9); 
INSERT INTO @testTable VALUES(getDate(), 1, 5, 7, 3); 
INSERT INTO @testTable VALUES(getDate(), 2, 8, 2, 1); 
INSERT INTO @testTable VALUES(getDate()-1, 1, 7, 2, 8); 
INSERT INTO @testTable VALUES(getDate()-1, 1, 0, 9, 4); 
INSERT INTO @testTable VALUES(getDate()-1, 2, 5, 6, 1); 
INSERT INTO @testTable VALUES(getDate()-2, 1, 7, 2, 5); 
INSERT INTO @testTable VALUES(getDate()-2, 2, 6, 6, 6); 
INSERT INTO @testTable VALUES(getDate()-2, 1, 5, 6, 3); 
INSERT INTO @testTable VALUES(getDate()-3, 1, 9, 3, 3); 
INSERT INTO @testTable VALUES(getDate()-3, 2, 6, 0, 1); 
INSERT INTO @testTable VALUES(getDate()-3, 1, 2, 7, 4); 

-- NEED TO MODIFY QUERY
SELECT  
    YEAR(OrderDate) AS [YEAR]
    ,MONTH(OrderDate) AS [MONTH]
    ,DAY(OrderDate)  AS [DAY]
    ,CASE WHEN StoreType IN (1,2) THEN SUM(Fruits) END AS FruitCount
    ,CASE WHEN StoreType IN (1,2) THEN SUM(Vegitables) END AS VegetablesCount
    ,CASE WHEN StoreType IN (1,2) THEN SUM(eggs) END  AS EggsCount
    ,StoreType
    ,(CASE WHEN StoreType = 1 THEN SUM(Fruits + vegitables + eggs) END) AS [CountBY Stype(1)]
FROM 
    @testTable
GROUP BY 
    YEAR(OrderDate),
    MONTH(OrderDate),
    DAY(OrderDate),
    StoreType

当前结果集：

   YEAR MONTH   DAY FruitCount  VegitalbesCount EggsCount   StoreType   CountBySType(1)
2015     2       9     11            10            7            1          28
2015     2       9     6             0             1            2         NULL
2015     2       10    12            8              8           1           28
2015     2      10      6            6              6           2         NULL
2015     2      11      7           11              12          1           30
2015    2       11      5           6               1           2           NULL
2015    2       12      9           13              12          1           34
2015    2       12      8           2               1           2           NULL

预期/期望的输出：

        YEAR    MONTH   DAY FruitCount  VegitalbesCount EggsCount   CountBY Stype(1)
        2015     2       9     17               10          8            28
        2015     2      10     18               14         14            28
        2015     2      11     12               17         13            30
        2015     2      12     17               15         13            34

有什么方法可以达到如上所述的结果集（预期）？我们可以使用子查询，但由于数据量大，查询速度很慢。

Answer 1

您需要从GroupBy中取出StoreType

试试这个：

SELECT  
YEAR(OrderDate) AS [YEAR]
,MONTH(OrderDate) AS [MONTH]
,DAY(OrderDate)  AS [DAY]
,SUM(CASE WHEN StoreType IN (1,2) THEN Fruits END )AS FruitCount
,SUM(CASE WHEN StoreType IN (1,2) THEN Vegetables END )AS VegetablesCount
,SUM(CASE WHEN StoreType IN (1,2) THEN eggs END)  AS EggsCount
,SUM(CASE WHEN StoreType = 1 THEN Fruits + Vegetables + eggs END) 
FROM @testTable
GROUP BY 
  YEAR(OrderDate),
  MONTH(OrderDate),
  DAY(OrderDate)

Answer 2

我在下面更改查询来实现。感谢大家阅读和解决方案。

SELECT  YEAR(OrderDate) AS [YEAR]
        ,MONTH(OrderDate) AS [MONTH]
        ,DAY(OrderDate)  AS [DAY]
        ,SUM(COALESCE(Fruits,0)) AS FruitCount
        ,SUM(COALESCE(Vegitables,0)) AS VegitalbesCount
        ,SUM(COALESCE(eggs,0)) AS EggsCount,
        SUM(CASE WHEN StoreType IN (1) THEN COALESCE(Fruits,0)+ COALESCE(Vegitables,0)+ COALESCE(eggs,0) END) [Total]
FROM @testTable
GROUP BY YEAR(OrderDate),MONTH(OrderDate),DAY(OrderDate)

需要在tsql中基于group by Date的select子句中获取基于计数的条件

2 个答案: