1、创建实例数据库和表:
create
database
demo
go

use
demo
create
table
T_User(UserName
varchar
(
64
))
go
create
trigger
prevent_drop_table
ON
DATABASE
FOR
DROP_TABLE
AS
RAISERROR
(
'
Not allowed to drop tables.
'
,
10







2、创建数据库触发器:


