S
slf0205
Unregistered / Unconfirmed
GUEST, unregistred user!
IF EXISTS (SELECT TABLE_NAME
FROM INFORMATION_SCHEMA.VIEWS
WHERE TABLE_NAME = N'<view_name, sysname, view_test>')
DROP VIEW <view_name, sysname, view_test>
GO
CREATE VIEW <view_name, sysname, view_test>
AS
<select_statement, , SELECT * FROM authors>
WITH CHECK OPTION
GO
以上SQL中
WHERE TABLE_NAME = N'<view_name, sysname, view_test>')
其中 N'是什么意思, 作用是什么?
FROM INFORMATION_SCHEMA.VIEWS
WHERE TABLE_NAME = N'<view_name, sysname, view_test>')
DROP VIEW <view_name, sysname, view_test>
GO
CREATE VIEW <view_name, sysname, view_test>
AS
<select_statement, , SELECT * FROM authors>
WITH CHECK OPTION
GO
以上SQL中
WHERE TABLE_NAME = N'<view_name, sysname, view_test>')
其中 N'是什么意思, 作用是什么?