我有一个数据库视图，该视图跨SQL Server 2005中的许多表进行联接。它看起来像这样：
SELECT
m1.MenuName AS menu_name, m2.MenuName AS sub_menu_name, p.ProductName, od.amount
FROM
dbo.tblMenus AS m1
FULL OUTER JOIN
dbo.tblMenus AS m2
FULL OUTER JOIN
dbo.tblProductsRelMenus AS pm ON m2.Id = pm.SubMenuId ON m1.Id = pm.MenuId
FULL OUTER JOIN
(SELECT
dbo.tblOrderDetails.ProductId, SUM(dbo.tblOrderDetails.Ammount) AS amount
FROM
dbo.tblOrderDetails
FULL OUTER JOIN
dbo.tblOrders AS o ON dbo.tblOrderDetails.OrderId = o.OrderId
WHERE (o.OrderDestroyed = 0)
GROUP BY dbo.tblOrderDetails.ProductId) AS od
RIGHT OUTER JOIN
dbo.tblProducts AS p ON od.ProductId = p.ProductId ON pm.ProductId = p.ProductId
当我尝试创建ADO .Net实体数据模型时，它抱怨在SSDL分区中没有主键。 然后我发现了这一点：
http://msdn.microsoft.com/en-us/library/dd163156.aspx
但我不了解有关定义查询的部分。 当然，我只想要一列具有唯一数字的键来定义键，或者？
<EntityType Name="SoldItemsView">
<Key>
<PropertyRef Name="SoldItemsViewId" />
</Key>
<Property Name="SoldItemsView" Type="int" Nullable="false" />
<Property Name="menu_name" Type="nvarchar" MaxLength="100" />
<Property Name="sub_menu_name" Type="nvarchar" MaxLength="100" />
<Property Name="ProductName" Type="nvarchar" MaxLength="50" />
<Property Name="amount" Type="int" />
</EntityType>
但是，如何用唯一数字填充此列？
谢谢，
巴里