SQL导出（带连接）将行更改为列 - 获取列的特定行数据

Question

我正在使用volusion cart软件，因此我只有导出访问权限。我有以下表格（带有一些示例数据）：

orders
orderid, shippingmethodid, orderstatus
12345, 218, Ready to Ship
12346, 152, Ready to Ship
12347, 602, Ready to Ship
12348, 10151, Processing


orderdetails
orderid, productcode, productname, qtyonpackingslip, qty
12345, proda-12, product a twelve, 1, 1
12346, prodb-14, product b fourteen, , 1
12346, prodc_15, product c fifteen, 0, 1
12347, prodd-21, product d twenty one, , 1
12347, prode-17, product e seventeen, , 1
12348, prodf-19, product f nineteen, , 1

我需要创建一个导出查询，将产品代码列为列而不是行。意思是如果订单上有多个产品代码，那个orderid应该有1行，＆amp;然而，许多列，因为有顺序的产品，但只有当qtyonpackingslip是＆gt; 0或null且数量> 0.结果需要看的示例：

应该有10个项目列。我很犹豫发布我尝试过的内容，部分来自于尴尬和尴尬。部分是因为它是如此错误，我可能会对我正在尝试做的事情造成混淆，但这里有一些只是让你们都知道我真的在尝试：

SELECT
o.orderid
, (SELECT productcode, row_number() over (order by productcode) as item1pc
        FROM orderdetails od WHERE item1pcv= 1) As Item1code
, (SELECT productname, row_number() over (order by productname) as item1name
        FROM orderdetails od WHERE item1name = 1) As Item1name
, (SELECT qtyonpackingslip row_number() over (order by qtyonpackingslip) as item1qty
        FROM orderdetails od WHERE item1qty= 1) As Item1qty
, shippingmethodid

 FROM orders o
    WHERE EXISTS (SELECT productcode, productname, qtyonpackingslip
    FROM orderdetails od
    LEFT JOIN orders on o.orderid = od.orderid 
    WHERE od.qtyonpackingslip > 0)

 WHERE o.orderstatus = 'Ready to Ship'

甚至没有关闭，也试过这个：

SELECT
o.orderid
, pd1.productcode As item1
, pd1.productname As item1name
, pd1.quantity As item1qty
, o.shippingmethodid

FROM orders o
LEFT JOIN (SELECT orderid, productcode, productname, qtyonpackingslip, quantity FROM 
    (SELECT ROW_NUMBER() OVER (ORDER BY orderid) AS Row
    , orderid
    , productcode
    , productname
    , quantity
    FROM orderdetails WHERE qtyonpackingslip > 0 
    OR (qtyonpackingslip IS NULL AND quantity > 0) 
    ) As pd1
    ON o.orderid = pd1.orderid AND Row = 1
    WHERE o.orderstatus = 'Ready to Ship'

再次，没有骰子。我以前从来没有得过具体的行，所以我不知道我在做什么！非常感谢任何帮助，谢谢！

Answer 1

您需要使用数据透视表。请参阅静态列的示例。您还可以进行动态列透视。

SELECT VendorID, [250] AS Emp1, [251] AS Emp2, [256] AS Emp3, [257] AS Emp4, [260] AS Emp5
FROM 
(SELECT PurchaseOrderID, EmployeeID, VendorID
FROM Purchasing.PurchaseOrderHeader) p
PIVOT
(
COUNT (PurchaseOrderID)
FOR EmployeeID IN
( [250], [251], [256], [257], [260] )
) AS pvt
ORDER BY pvt.VendorID;

Answer 2

正如我们所讨论的，你真正想要的不是PIVOT数据。透视将数据集中的单元格中的值转换为列，在您的情况下，您仍然希望将这些值作为值。不同之处在于，您希望将与同一订单关联的值作为单行返回，将列附加到结果集中，以获取订单所具有的任何数量的产品（及其详细信息）。

以下是我们提出的解决方案：

{
    "line_numbers": true,
    "gutter": true,
    "column_number": true,
}