SQL Server 2005的维护计划无法删除的解决方法

1、查看"维护计划"对象的ID
代码如下:
use msdb
select * from sysmaintplan_plans
select * from sysmaintplan_log
select * from sysmaintplan_subplans

2、根据ID号删除相应的"维护计划"
代码如下:
delete from sysmaintplan_log where plan_id = ' ‘
delete from sysmaintplan_subplans where subplan_id = ' '
delete from sysmaintplan_plans where id = ' '