今天开发中，发现维护计划无法删除删除了，遂发现下面的代码，希望对碰到类似问题的朋友有所帮助。
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 = ' '
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