用逗号分隔连接表格和返回数据

Question

我有如下所述的要求。查询需要获取SQL Server 2008 R2数据库上的数据。

尽我所能提取数据如下所述，但不能。非常感谢您的帮助。

Product_table

SKU UPC Details Weight Color 
223 111 TShirt 25  White 
224 114 Pants  25  Black 
225 115 Abc  29  Yellow 
230 116 XyX  23  Pink 
226 117 AXYz  25  Red 
226 118 Abdc  26  White 
228 119 Abcr  20  Pink 
229 120 Abcy  22  Green 

Custom_tbl

SKU Custom_name Custom_value 
223  Pickup   true 
223  eligible   false 
223  size    medium 
223  map    red 
224  pickup   false 
224  eligible   false 
224  map    green 
225  Pickup   true 
225  eligible   true 
225  size    large 
225  department  001 
225  availability  true 
226  Pickup   true 
226  size    large 
226  map    blue 
226  availability  true 
229  eligible   true 

从提到查询以上两个表需要如后所述，以获取数据。

注意：CustomValues（示例表中的第六列）用逗号分隔，我只需要3个值（Custom_tbl中的拾取，符合条件的映射列和其余部分需要忽略;如果任何custom_name不可用，则它应该返回空字符串（从第3行检查），如下所示）

SKU UPC DETAILS WEIGHT COLOR  CustomValues 
223 111 TShirt 25  White  true,false,red 
224 114 Pants  25  Black  false,false,green 
225 115 Abc  29  Yellow  true,true, 
226 118 Abdc  26  White  true,,blue 
228 119 Abcr  20  Pink  ,,, 
229 120 Abcy  22  Green  ,true, 

任何能帮助我在修改了上述相同数据的查询，但我需要排除其CUSTOM_NAME可享有和价值是虚假数据。我有这个查询得到我正在寻找原始问题，但无法添加我正在寻找的条件。感谢您的帮助。

对于上述相同的数据，我需要排除其Custom_name符合条件且值为false的数据。我有这样的查询，但无法添加上述逻辑

SELECT productDetails.sku, Isnull(productDetails.sku, '') + ',' 
     + Isnull(productDetails.upc, '') + ',' 
     + Isnull(productDetails.details, '') 
     + ',' + CustomValues 
     FROM (SELECT PD.*, 
       Stuff((SELECT ',' + Attributes.customval 
        FROM (SELECT 
        A.sku, 
        Isnull(Max(A.[Pickup]), '') + ',' 
        + Isnull(Max(A.[eligible]), '') + ',' 
        + Isnull(Max(A.[size]), '') AS customVal 
        FROM (SELECT sku, Isnull(CASE WHEN custom_name = 'Pickup' THEN Max(custom_value) END, '') AS 'Pickup', 
             Isnull(CASE WHEN custom_name = 'eligible' THEN Max(custom_value) END, '') AS 'eligible', 
             Isnull(CASE WHEN custom_name = 'size' THEN Max(custom_value) END, '') AS 'size' 
          FROM [product_custom_details] 
          GROUP BY sku, custom_field_name) AS A              
          GROUP BY A.sku) Attributes 
         WHERE Attributes.sku = PD.sku 
         FOR xml path('')), 1, 1, '') AS CustomValues 
     FROM [product_details] PD) AS productDetails 
ORDER BY productDetails.sku 

Answer 1

您可以Custom_tbl表使用GROUP BY每SKU和应用情况，以获得个人自定义值

SELECT 
    SKU, 
    ISNULL(CASE WHEN Custom_name = 'Pickup' THEN Custom_value END,'') + ',' 
    ISNULL(CASE WHEN Custom_name = 'eligible' THEN Custom_value END,'') + ',' 
    ISNULL(CASE WHEN Custom_name = 'map' THEN Custom_value END,'') as CustomValues 
FROM Custom_tbl 
WHERE Custom_name IN ('Pickup','eligible','map') 
GROUP BY SKU 

现在刚刚与主表加入这个每sku

SELECT P.SKU, UPC, DETAILS, WEIGHT, COLOR, ISNULL(C.CustomValues,'') as CustomValues 
FROM Product_table P 
LEFT JOIN(
    SELECT 
     SKU, 
     ISNULL(CASE WHEN Custom_name = 'Pickup' THEN Custom_value END,'') + ',' 
     ISNULL(CASE WHEN Custom_name = 'eligible' THEN Custom_value END,'') + ',' 
     ISNULL(CASE WHEN Custom_name = 'map' THEN Custom_value END,'') as CustomValues 
    FROM Custom_tbl 
    WHERE Custom_name IN ('Pickup','eligible','map') 
    GROUP BY SKU 
)C ON P.sku = C.sku 

Answer 2

试试这个：

SELECT DISTINCT P.SKU,P.UPC,Details,P.[Weight],P.[Color], 
STUFF((SELECT ',' + Custom_value 
     from Custom_tbl 
     where SKU=P.SKU FOR XML PATH('')),1,1,'') AS Customvalues 
FROM Product_table P 

Answer 3

DECLARE @Product_Table AS TABLE (SKU INT, UPC INt, Details VARCHAR(100), Weight INT, Color VARCHAR(100)) 
DECLARE @Custom_Tbl AS TABLE (SKU INT, Custom_Name VARCHAR(100), Custom_Value VARCHAR(100)) 

INSERT INTO @Product_Table VALUES (223,111,'TShirt',25,'White'),(224,114,'Pants',25,'Black') 
,(225,115,'Abc',29,'Yellow'),(230,116,'XyX',23,'Pink'),(226,117,'AXYz',25,'Red') 
,(226,118,'Abdc',26,'White'),(228,119,'Abcr',20,'Pink'),(229,120,'Abcy',22,'Green') 

INSERT INTO @Custom_Tbl VALUES (223,'Pickup','true'),(223,'eligible','false'),(223,'size','medium') 
,(223,'map','red'),(224,'pickup','false'),(224,'eligible','false'),(224,'map','green') 
,(225,'Pickup','true'),(225,'eligible','true'),(225,'size','large'),(225,'department','001') 
,(225,'availability','true'),(226,'Pickup','true'),(226,'size','large'),(226,'map','blue') 
,(226,'availability','true'),(229,'eligible','true') 


;WITH cteCustomNames AS (
    SELECT * 
    FROM 
     (VALUES ('Pickup',1),('eligible',2),('map',3)) t(Custom_name,StringOrder) 
) 

, cteProductRowNum AS (
    SELECT 
     p.* 
     ,RowNum = ROW_NUMBER() OVER (PARTITION BY p.SKU ORDER BY Weight) 
    FROM 
     @Product_Table p 
) 

SELECT * , STUFF(
      (SELECT ',' + ISNULL(Custom_value,'') 
      FROM 
      cteCustomNames cn 
      LEFT JOIN @Custom_Tbl c 
      ON cn.Custom_name = c.Custom_Name 
      AND c.SKU = p.SKU 
      ORDER BY 
      cn.StringOrder 
      FOR XML PATH('')) 

     ,1,1,'') 
FROM 
    cteProductRowNum p 
WHERE 
    p.RowNum = 1 

所以你实际上可以有一些棘手的部分到您的查询。首先，您显示逗号每位置即使该位置不退出。这需要交叉或左连接来拉开。您显示的结果将是每个SKU 1行，但在您的产品表中显示多个产品每SKU因此您需要一个排名函数来确定您想要的行。无论如何，这是完成这一切的一种方式。像其他人一样，我也建议使用STUFF()与FOR XML进行连接。哦，你提到你想要特定顺序的字符串。