如何添加新列（作为主键列）查看

Posted 2023-02-26

【中文标题】如何添加新列（作为主键列）查看

【英文标题】：How to add a new column (as a primary key column ) to view

【发布时间】：2012-10-27 12:15:42

【问题描述】：

是否可以添加列（PK）来查看。如果是的话..我们怎么能？

这是我的看法：

CREATE VIEW [dbo].[SalesDetailView]
AS
SELECT
    DATENAME(yyyy, SH.CreatedDateTime) AS Year,
    DATENAME(mm, SH.CreatedDateTime) AS Month, SH.CreatedDateTime AS Date,
    SH.TransactionName AS Type, SH.SalesHeaderID AS No,
    Customer.CustomerName AS Customer,
    CustomerGroup.CustomerGroupName AS Customer_Group, SH.Reference AS Memo,
    Item.ItemName AS Item, SD.LineDescription AS Item_Description,
    Item.ItemType AS Item_Type, Item.UOM,
    ItemGroup.ItemGroupName AS Item_Group,
    CAST (SD.Quantity AS INT) AS Quantity, CAST(SD.Amount AS MONEY) AS Amount,
    SD.Price, SD.Discount, SH.ExchangeRate AS Exchange_Rate,
    Currency.CurrencyDescription AS Currency, SD.ClassID AS Class_ID,
    SD.SalesTaxID AS SalesTax_ID, SalesTaxGroup.SalesTaxGroupName AS Tax_Group,
    Employee.EmployeeName AS Salesperson,
    ShippingMethod.ShippingMethodName AS Shipping_Method,
    PaymentTerm.PaymentTermName AS Payment_Term,
    PaymentMethod.PaymentMethodName AS Payment_Method
FROM
    SalesHeader SH, Customer
LEFT OUTER JOIN 
    SalesDetail SD ON SH.SalesHeaderID = SD.SalesHeaderID
LEFT OUTER JOIN 
    Item ON SD.ItemID = Item.ItemID
LEFT OUTER JOIN 
    ItemGroup ON Item.ItemGroupId = ItemGroup.ItemGroupID
LEFT OUTER JOIN 
    CustomerGroup ON Customer.CustomerGroupId = CustomerGroup.CustomerGroupID
LEFT OUTER JOIN 
    Employee ON Customer.EmployeeID = Employee.EmployeeID
LEFT OUTER JOIN 
    Currency ON Customer.CurrencyID = Currency.CurrencyID
LEFT OUTER JOIN 
    SalesTaxGroup ON Customer.SalesTaxGroupID = SalesTaxGroup.SalesTaxGroupID
LEFT OUTER JOIN 
    PaymentTerm ON Customer.PaymentTermID = PaymentTerm.PaymentTermID
LEFT OUTER JOIN 
    ShippingMethod ON Customer.ShippingMethodID = ShippingMethod.ShippingMethodID
LEFT OUTER JOIN 
    PaymentMethod ON Customer.PaymentMethodID = PaymentMethod.PaymentMethodID
WHERE
    SH.CustomerID = Customer.CustomerID
    AND SH.TransactionName <> 'SalesOrder'
    AND Sh.TransactionName <> 'Quote'

【问题讨论】：

请将代码添加到您的帖子中，而不是链接到其他地方

抱歉视图包含 40 行代码..我试图添加代码。但我不能..

在此处发布查看代码。一条评论：为什么Customer 没有像所有其他表一样正确连接？使用INNER JOIN Customer ON SH.CustomerID = Customer.CustomerID（并从WHERE 子句中删除该条件）使其与所有其他表相同！

我在 sql 中收到此错误：FROM 子句中的对象“客户”和“客户”具有相同的公开名称。使用相关名称来区分它们。

如果您将我的行与 INNER JOIN Customer 一起使用 - 您当然必须从您的 FROM 语句中删除 ..... , Customer！

【参考方案1】：

您可以使用row_number 添加一个唯一列，例如：

CREATE VIEW [dbo].[SalesDetailView]
AS
SELECT
    row_number() over (order by SH.CreatedDateTime) as PK,
    DATENAME(yyyy, SH.CreatedDateTime) AS Year,

如果这不是您的意思，请澄清您的问题。一些示例结果总是很有帮助的。

【讨论】：

我添加了这一行：row_number() over (order by Employee.EmployeeID) 作为PK，在Employee 表中EmployeeId 列是标识列。我运行实体模型。现在，视图显示正确的数据。问题是当我在 SQL 中看到视图设计时，它没有显示。当我从视图中删除 row_number() 时，它会显示在视图的设计中。

【参考方案2】：

当您看到视图的 sp_help 时，提到的标识列只不过是基础表的标识。

如果你已经在基础表中添加了标识列，你只需要改变你的视图并在select stmt中添加标识列。

否则，您需要先将标识添加到表中，然后编辑视图以在您的选择 stmt 中添加列。

ALTER  VIEW [dbo].[SalesDetailView]
AS
SELECT
    DATENAME(yyyy, SH.CreatedDateTime) AS Year,
    DATENAME(mm, SH.CreatedDateTime) AS Month, SH.CreatedDateTime AS Date,
    SH.TransactionName AS Type, SH.SalesHeaderID AS No,
    Customer.CustomerName AS Customer,
    CustomerGroup.CustomerGroupName AS Customer_Group, SH.Reference AS Memo,
    Item.ItemName AS Item, SD.LineDescription AS Item_Description,
    Item.ItemType AS Item_Type, Item.UOM,
    ItemGroup.ItemGroupName AS Item_Group,
    CAST (SD.Quantity AS INT) AS Quantity, CAST(SD.Amount AS MONEY) AS Amount,
    SD.Price, SD.Discount, SH.ExchangeRate AS Exchange_Rate,
    Currency.CurrencyDescription AS Currency, SD.ClassID AS Class_ID,
    SD.SalesTaxID AS SalesTax_ID, SalesTaxGroup.SalesTaxGroupName AS Tax_Group,
    Employee.EmployeeName AS Salesperson,
    ShippingMethod.ShippingMethodName AS Shipping_Method,
    PaymentTerm.PaymentTermName AS Payment_Term,
    PaymentMethod.PaymentMethodName AS Payment_Method,
    [your column] as  PK
FROM
    SalesHeader SH, Customer
LEFT OUTER JOIN 
    SalesDetail SD ON SH.SalesHeaderID = SD.SalesHeaderID
LEFT OUTER JOIN 
    Item ON SD.ItemID = Item.ItemID
LEFT OUTER JOIN 
    ItemGroup ON Item.ItemGroupId = ItemGroup.ItemGroupID
LEFT OUTER JOIN 
    CustomerGroup ON Customer.CustomerGroupId = CustomerGroup.CustomerGroupID
LEFT OUTER JOIN 
    Employee ON Customer.EmployeeID = Employee.EmployeeID
LEFT OUTER JOIN 
    Currency ON Customer.CurrencyID = Currency.CurrencyID
LEFT OUTER JOIN 
    SalesTaxGroup ON Customer.SalesTaxGroupID = SalesTaxGroup.SalesTaxGroupID
LEFT OUTER JOIN 
    PaymentTerm ON Customer.PaymentTermID = PaymentTerm.PaymentTermID
LEFT OUTER JOIN 
    ShippingMethod ON Customer.ShippingMethodID = ShippingMethod.ShippingMethodID
LEFT OUTER JOIN 
    PaymentMethod ON Customer.PaymentMethodID = PaymentMethod.PaymentMethodID
WHERE
    SH.CustomerID = Customer.CustomerID
    AND SH.TransactionName <> 'SalesOrder'
    AND Sh.TransactionName <> 'Quote'

【讨论】：

感谢您的回复。在 Employee 表中，employeeID 是标识列。所以我只是在视图 row_number() 中添加了这一行（按 Employee.EmployeeID 排序）作为 PK，

现在实体模型显示正确的数据。但是当我尝试查看 SalesDetailView 的设计视图时。它给出错误消息：SQL 文本无法在网格窗格和图表窗格中表示。