USE [msdb]
DECLARE @job_name VARCHAR(100)
SET @job_name = N'backup_diff.Subplan_1'    -- SELECT * FROM sysjobs_view; 可以通过这句查询作业名称，直接拷过来，避免手动输错
 
--注：jobName为维护计划对应的jobName
--删除在计划里面的日志
DELETE
    sysmaintplan_log
FROM
    sysmaintplan_subplans AS subplans
    INNER JOIN sysjobs_view AS syjobs ON subplans.job_id = syjobs.job_id
    INNER JOIN sysmaintplan_log ON subplans.subplan_id =sysmaintplan_log.subplan_id
WHERE
    (syjobs.name = @job_name)
 
--删除代理的作业
DELETE
    sysjobschedules FROM sysjobs_view v
    INNER JOIN sysjobschedules o ON v.job_id=o.job_id
WHERE
    v.name=@job_name
 
--删除子计划
DELETE
    sysmaintplan_subplans
FROM
    sysmaintplan_subplans AS subplans    
    INNER JOIN sysjobs_view AS syjobs ON subplans.job_id = syjobs.job_id
WHERE
    (syjobs.name = @job_name)
 
--删除作业
DELETE FROM msdb.dbo.sysjobs_view WHERE name = @job_name

SELECT * FROM sysjobs_view