Question

我在Oracle中有一个物化视图，需要将其转换为SQL服务器。我不知道如何使用索引视图概念编写相同的内容。这是我的物化视图

CREATE MATERIALIZED VIEW STUD_FUZZY_CERTIFICATIONS_mv 
FOR UPDATE 
AS 
SELECT *
FROM STUD_FUZZY_CERTIFICATIONS; -- some base table

Answer 1

AS Marc_s声明 here

他们在SQL Server中被称为索引视图 - 阅读这些白皮书以获取更多背景信息：

基本上，您需要做的就是：

创建常规视图
在该视图上创建聚簇索引

你已经完成了！

棘手的部分是：视图必须满足许多约束和限制 - 白皮书中概述了这些限制和限制。如果你这样做 - 这就是全部。视图正在自动更新，无需维护。

<强>示例

USE AdventureWorks2012;
GO
--Set the options to support indexed views.
SET NUMERIC_ROUNDABORT OFF;
SET ANSI_PADDING, ANSI_WARNINGS, CONCAT_NULL_YIELDS_NULL, ARITHABORT,
    QUOTED_IDENTIFIER, ANSI_NULLS ON;
GO
--Create view with schemabinding.
IF OBJECT_ID ('Sales.vOrders', 'view') IS NOT NULL
DROP VIEW Sales.vOrders ;
GO
CREATE VIEW Sales.vOrders
WITH SCHEMABINDING
AS
    SELECT SUM(UnitPrice*OrderQty*(1.00-UnitPriceDiscount)) AS Revenue,
        OrderDate, ProductID, COUNT_BIG(*) AS COUNT
    FROM Sales.SalesOrderDetail AS od, Sales.SalesOrderHeader AS o
    WHERE od.SalesOrderID = o.SalesOrderID
    GROUP BY OrderDate, ProductID;
GO
--Create an index on the view.
CREATE UNIQUE CLUSTERED INDEX IDX_V1 
    ON Sales.vOrders (OrderDate, ProductID);
GO
--This query can use the indexed view even though the view is 
--not specified in the FROM clause.
SELECT SUM(UnitPrice*OrderQty*(1.00-UnitPriceDiscount)) AS Rev, 
    OrderDate, ProductID
FROM Sales.SalesOrderDetail AS od
    JOIN Sales.SalesOrderHeader AS o ON od.SalesOrderID=o.SalesOrderID
        AND ProductID BETWEEN 700 and 800
        AND OrderDate >= CONVERT(datetime,'05/01/2002',101)
GROUP BY OrderDate, ProductID
ORDER BY Rev DESC;
GO
--This query can use the above indexed view.
SELECT  OrderDate, SUM(UnitPrice*OrderQty*(1.00-UnitPriceDiscount)) AS Rev
FROM Sales.SalesOrderDetail AS od
    JOIN Sales.SalesOrderHeader AS o ON od.SalesOrderID=o.SalesOrderID
        AND DATEPART(mm,OrderDate)= 3
        AND DATEPART(yy,OrderDate) = 2002
GROUP BY OrderDate
ORDER BY OrderDate ASC;
GO

物化视图到索引视图

1 个答案: