在Oracle中,我可以用一条语句重新创建一个视图,如下所示:
CREATE OR REPLACE VIEW MY_VIEW AS
SELECT SOME_FIELD
FROM SOME_TABLE
WHERE SOME_CONDITIONS
正如语法所暗示的,这将删除旧的视图,并使用我给出的任何定义重新创建它。
MSSQL (SQL Server2005或更高版本)中是否有等效项可以做同样的事情?
发布于 2011-03-04 02:28:20
尽管上面的解决方案可以完成这项工作,但它们会冒着丢失用户权限的风险。我更喜欢按如下方式创建或替换视图或存储过程。
IF NOT EXISTS (SELECT * FROM sys.views WHERE object_id = OBJECT_ID(N'[dbo].[vw_myView]'))
EXEC sp_executesql N'CREATE VIEW [dbo].[vw_myView] AS SELECT ''This is a code stub which will be replaced by an Alter Statement'' as [code_stub]'
GO
ALTER VIEW [dbo].[vw_myView]
AS
SELECT 'This is a code which should be replaced by the real code for your view' as [real_code]
GO
发布于 2009-06-02 11:41:54
我使用:
IF OBJECT_ID('[dbo].[myView]') IS NOT NULL
DROP VIEW [dbo].[myView]
GO
CREATE VIEW [dbo].[myView]
AS
..。
最近,我为这类东西添加了一些实用程序:
CREATE PROCEDURE dbo.DropView
@ASchema VARCHAR(100),
@AView VARCHAR(100)
AS
BEGIN
DECLARE @sql VARCHAR(1000);
IF OBJECT_ID('[' + @ASchema + '].[' + @AView + ']') IS NOT NULL
BEGIN
SET @sql = 'DROP VIEW ' + '[' + @ASchema + '].[' + @AView + '] ';
EXEC(@sql);
END
END
所以现在我写下
EXEC dbo.DropView 'mySchema', 'myView'
GO
CREATE View myView
...
GO
我认为这会使我的更改脚本更具可读性。
发布于 2008-10-02 16:18:53
我通常使用这样的东西:
if exists (select * from dbo.sysobjects
where id = object_id(N'dbo.MyView') and
OBJECTPROPERTY(id, N'IsView') = 1)
drop view dbo.MyView
go
create view dbo.MyView [...]
https://stackoverflow.com/questions/163246
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