trigger 的制作

trigger 的制作

trigger 的制作 --我们有一个table如下，需要跟踪修改对该表的insert/update/delete操作：

create table testMonitor(c1 int, c2 char(10))

--创建的辅助表如下：

create table tempLog_testMonitor(

rowID bigint identity(1,1),

hostname nchar(128),

program_name nchar(128),

nt_domain nchar(128),

nt_username nchar(128),

net_address nchar(12),

loginame nchar(128),

login_time datetime,

EventType nvarchar(30),

parameters int,

EventInfo nvarchar(255)

)

--创建的trigger如下：

create trigger trg_testMonitor

on testMonitor

for insert,update,delete

as

begin

declare @hostname nchar(128)

declare @program_name nchar(128)

declare @nt_domain nchar(128)

declare @nt_username nchar(128)

declare @net_address nchar(12)

declare @loginame nchar(128)

declare @login_time datetime

declare @rowID bigint

insert into tempLog_testMonitor(EventType,parameters,EventInfo)

exec ('dbcc inputbuffer(@@spid)')

select @rowID = scope_identity()

select @hostname = hostname,

@program_name = program_name,

@nt_domain = nt_domain,

@nt_username = nt_username,

@net_address = net_address,

@loginame = loginame,

@login_time = login_time

from master..sysprocesses where spid = @@spid

update tempLog_testMonitor set

hostname = @hostname,

program_name = @program_name,

nt_domain = @nt_domain,

nt_username = @nt_username,

net_address = @net_address,

loginame = @loginame,

login_time = @login_time

where rowID = @rowID

end

--如果我们执行如下的语句：

insert into testmonitor values(1,'aaa')

update testmonitor set c2 = 'bbb'

delete from testmonitor

--您再查询辅助表，就能看到对表修改的相关信息：

select * from tempLog_testMonitor