sql-server - 创建视图并选择 Top10

Question

所以标题非常准确，我想我快到了这就是我所拥有的

编辑：视图应该选择列供应商名称，列 LastInvoice 是列中的最新日期和 invoiceTotal 列的总计。我希望它只显示前 10 个已支付的 invoiceTotals 以及相应的最新发票日期和供应商名称。

CREATE VIEW TOP10PAIDInvoices
AS
  SELECT VendorName,
         MAX(InvoiceDate)  AS LastInvoice,
         SUM(InvoiceTotal) AS SumOfInvoices
  FROM   Vendors
         JOIN Invoices
           ON Vendors.VendorID = Invoices.VendorID
  WHERE  (SELECT TOP 10 SumOfInvoices
          FROM   TOP10PAIDInvoices
          GROUP  BY SumOfInvoices
          HAVING SumOfInvoices > 0)
  ORDER  BY SumOfInvoices 

Answer 1

您的语法不正确，部分原因是您的视图 def 正在尝试自我引用。

ORDER BY与 TOP N 表达式一起使用时，在视图 def 中是合法的。

CREATE VIEW TOP10PAIDInvoices AS
SELECT TOP 10 VendorName = MAX(VendorName), MAX(InvoiceDate) AS LastInvoice, SUM(InvoiceTotal) AS SumOfInvoices
FROM Vendors JOIN Invoices
ON Vendors.VendorID = Invoices.VendorID
GROUP BY Vendors.VendorID
HAVING SUM(InvoiceTotal) > 0
ORDER BY SUM(InvoiceTotal) DESC;
GO