Question

我有一个像这样的结构表：

sensorId int, Value int, obDate datetime

在SQL Server 2008 Express中。

我想获得每个传感器的最新值，所以我创建了一个像这样的视图：

CREATE VIEW [dbo].[LAT_POLDATA] 
AS (
    SELECT A.sensorId, A.obDate, A.Value 
    FROM [Met].[dbo].[POLDATA] AS A
    INNER JOIN 
        (SELECT sensorId, MAX(obDate) AS obDate 
         FROM [Met].[dbo].[POLDATA] 
         GROUP BY sensorId) AS B ON A.sensorId = B.sensorId 
                                 AND A.obDate = B.obDate 
)

现在如果我查询Select * from [dbo].[LAT_POLDATA]我在Microsoft SQL Server Management Studio中执行此操作时会获得值，但我在数据库中的Views下看不到此视图。

如果我从ASP.net服务查询它，查询将失败并抛出错误：

System.Data.SqlClient.SqlException：无效的对象名称'LAT_POLDATA'

观点在哪里？为什么我没有看到SSMS？

Answer 1

在Management Studio中，请尝试添加首选数据库名称并执行它。

use [yourDatabaseName]

Select * from [dbo].[LAT_POLDATA]

如果这样会给您一个错误，即您的数据库中没有该视图

然后按照

进行操作

USE [yourDatabasename]
GO

SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO

Create View [dbo].[LAT_POLDATA] AS (
    SELECT A.sensorId , A.obDate , A.Value 
    FROM [Met].[dbo].[POLDATA] AS A
    INNER JOIN (
        SELECT sensorId , MAX(obDate) AS obDate 
        FROM [Met].[dbo].[POLDATA] 
        GROUP BY sensorId  
    ) AS B
        ON A.sensorId  = B.sensorId 
        AND A.obDate  = B.obDate 
)

GO

Answer 2

执行此查询并查看是否可以在此处找到它，此查询将返回在您的数据库中创建的所有视图

SELECT SCHEMA_NAME(schema_id) AS schema_name
 ,name AS view_name
 ,OBJECTPROPERTYEX(OBJECT_ID,'IsIndexed') AS IsIndexed
 ,OBJECTPROPERTYEX(OBJECT_ID,'IsIndexable') AS IsIndexable
 FROM sys.views
 WHERE name LIKE 'LAT_POLDATA%'
 GO

我在SQL Server中的视图在哪里？

2 个答案: