SQL server 使用触发器跨数据库备份数据

create database TriggerTest

create table transInfo2 --交易信息表
(
cardID     varchar(10) not null,  --卡号
transType  char(4)     not null,  --交易类型(存入/支取)
transMoney money       not null,  --交易金额
transDate  datetime    not null   --交易日期
)
go

create database TriggerDatabase
use TriggerDatabase
go

create table transInfo --交易信息表
(
cardID     varchar(10) not null,  --卡号
transType  char(4)     not null,  --交易类型(存入/支取)
transMoney money       not null,  --交易金额
transDate  datetime    not null   --交易日期
)
go

--------------- 添加测试数据 ---------------
insert into transInfo(cardID,transType,transMoney)
values('10000','支取',200);

--------------- 查看结果 ---------------
select * from transInfo;
go

/* 实现: 当删除TriggerDatabase数据库transInfo表中的数据时，
自动备份被清除的数据到TriggerTest数据库中的transInfo2表中
*/
------------------ delete 触发器 ------------------
use TriggerDatabase
go

if exists (select * from sysobjects
where name='trig_delete_transInfo')
drop trigger trig_delete_transInfo
go

create trigger trig_delete_transInfo
on transInfo after delete  --  for | after
as
-- 如果数据库中，不存在 backupTable 表
if not exists(select * from sysobjects
where name='TriggerTest.dbo.transInfo2')
insert into TriggerTest.dbo.transInfo2 select * from deleted --deleted临时表
else
insert into TriggerTest.dbo.transInfo2 select * from deleted
go

------------------ 测试触发器 ------------------
set nocount on

delete from transInfo where cardid='10000'; --测试

--查看结果
use TriggerTest
go
select * from transInfo2