SQL Server 2016答案

Question

CREATE OR REPLACE VIEW似乎在SQL Server中不起作用。那么如何移植CREATE OR REPLACE VIEW来处理SQL Server？

这就是我要做的事情：

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

有什么想法吗？

Answer 1

借用@Khan的回答，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 Reference

Answer 2

这是另一种方法，您无需复制视图的内容：

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 ;

首先检查视图的存在（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，则转到alter view语句。

Answer 3

SQL Server 2016答案

使用SQL Server 2016，您现在可以执行（MSDN Source）：

DROP VIEW IF EXISTS dbo.MyView

Answer 4

编辑：虽然此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。然后根据结果执行CREATE VIEW或ALTER VIEW。

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

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')

Answer 6

这样的事情怎么样，评论应该解释：

--DJ - 2015-07-15 Example for view CREATE or REPLACE

--Replace with schema and view names
DECLARE @viewName NVARCHAR(30)= 'T';
DECLARE @schemaName NVARCHAR(30)= 'dbo';

--Leave this section as-is
BEGIN TRY
    DECLARE @view AS NVARCHAR(100) = '
CREATE VIEW ' + @schemaName + '.' + @viewName + ' AS SELECT '''' AS [1]';
    EXEC sp_executesql
        @view;
END TRY
BEGIN CATCH
    PRINT 'View already exists';
END CATCH;
GO

--Put full select statement here after modifying the view & schema name appropriately
ALTER VIEW [dbo].[T]
AS
    SELECT  '' AS [2];
GO


--Verify results with select statement against the view
SELECT  *
FROM    [T];

干杯 -DJ

Answer 7

可以通过删除视图并重新创建视图来完成视图的更改。使用以下内容删除并重新创建视图。

IF EXISTS
(SELECT NAME FROM SYS.VIEWS WHERE NAME = 'dbo.test_abc_def')
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

Answer 8

IF NOT EXISTS(select * FROM sys.views where name = 'data_VVVV ')
    BEGIN
        CREATE VIEW data_VVVV AS 
        SELECT VCV.xxxx, VCV.yyyy AS yyyy, VCV.zzzz AS zzzz FROM TABLE_A VCV
    END
ELSE
    BEGIN
        ALTER VIEW data_VVVV AS 
        SELECT VCV.xxxx, VCV.yyyy AS yyyy, VCV.zzzz AS zzzz FROM TABLE_A VCV
    END

如何使SQL Server中的CREATE或REPLACE VIEW工作？

8 个答案:

SQL Server 2016答案