如何使SQL Server中的CREATE或REPLACE VIEW工作？

Question

CREATE OR REPLACE VIEW似乎在SQL Server中不起作用.那么我如何移植CREATE OR REPLACE VIEW到SQL Server上？

这就是我想要做的:

CREATE OR REPLACE VIEW data_VVVV AS 
SELECT 
    VCV.xxxx,
        VCV.yyyy AS yyyy,
        VCV.zzzz AS zzzz
FROM 
TABLE_A
;

有任何想法吗？

Answer 1

借用@Khan的答案,我会这样做:

IF OBJECT_ID('dbo.test_abc_def', 'V') IS NOT NULL
    DROP VIEW dbo.test_abc_def
GO

CREATE VIEW dbo.test_abc_def AS
SELECT 
    VCV.xxxx
    ,VCV.yyyy AS yyyy
    ,VCV.zzzz AS zzzz
FROM TABLE_A

MSDN参考

Answer 2

这是另一种方法,您不必复制视图的内容:

IF (NOT EXISTS (SELECT 1 FROM sys.views WHERE name = 'data_VVV'))
BEGIN
    EXECUTE('CREATE VIEW data_VVVV as SELECT 1 as t');
END;

GO

ALTER VIEW data_VVVV AS 
    SELECT VCV.xxxx, VCV.yyyy AS yyyy, VCV.zzzz AS zzzz FROM TABLE_A ;

第一个检查是否存在视图(还有其他方法可以做到这一点).如果它不存在,那么用简单和愚蠢的东西创建它.如果是,那么继续前进到alter view声明.

Answer 3

SQL Server 2016答案

使用SQL Server 2016,您现在可以执行(MSDN源代码):

DROP VIEW IF EXISTS dbo.MyView

Answer 4

编辑:虽然这个问题已被标记为重复,但它仍然受到关注.@JaKXz提供的答案是正确的,应该是接受的答案.

您需要检查视图是否存在.然后做一个CREATE VIEW或ALTER VIEW取决于结果.

IF OBJECT_ID('dbo.data_VVVV') IS NULL
BEGIN
    CREATE VIEW dbo.data_VVVV
    AS
    SELECT VCV.xxxx, VCV.yyyy AS yyyy, VCV.zzzz AS zzzz FROM TABLE_A VCV
END
ELSE
    ALTER VIEW dbo.data_VVVV
    AS
    SELECT VCV.xxxx, VCV.yyyy AS yyyy, VCV.zzzz AS zzzz FROM TABLE_A VCV
BEGIN
END

Answer 5

已接受的解决方案存在需要两次维护相同语句的问题,它不是非常有效(尽管它有效).从理论上讲,Gordon Linoff的解决方案将会解决,除非它在MSSQL中不起作用,因为创建视图必须是批处理中的第一行.

drop/create不会回答提出的问题.以下是原始问题的工作.

if not exists (select * from sysobjects where name='TABLE_A' and xtype='V')
exec ('create view SELECT 
VCV.xxxx,
    VCV.yyyy AS yyyy,
    VCV.zzzz AS zzzz
FROM TABLE_A')