在SQL Server中判断一个作业是否正在运行

select step_id,run_status,run_date As rundate
--a.run_time, a.*
from msdb.dbo.sysjobhistory a
inner join msdb.dbo.sysjobs b on a.job_id=b.job_id
where b.name='PCDBI'
order by run_date DESC,step_id Asc

作业的执行状态run_status：
0 = 失败
1 = 成功
2 = 重试
3 = 取消
4 = 正在进行
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-- author : p.c.w.l
-- source : www.sqlstudy.com
-- create : 2008-01-01
-- descr : a simple sql script to view sql server jobs run status
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select category = jc.name,
category_id = jc.category_id,
job_name = j.name,
job_enabled = j.enabled,
last_run_time = cast(js.last_run_date as varchar(10)) + '-' + cast(js.last_run_time as varchar(10)),
last_run_duration = js.last_run_duration,
last_run_status = js.last_run_outcome,
last_run_msg = js.last_outcome_message + cast(nullif(js.last_run_outcome,1) as varchar(2)),
job_created = j.date_created,
job_modified = j.date_modified
from msdb.dbo.sysjobs j
inner join msdb.dbo.sysjobservers js
on j.job_id = js.job_id
inner join msdb.dbo.syscategories jc
on j.category_id = jc.category_id
where j.enabled = 1
and js.last_run_outcome in (0,1,3,5) -- 0:Fail 1:Succ 3:Cancel 5:First run
and jc.category_id not between 10 and 20 -- repl

/*
category_id name
0 [Uncategorized (Local)]
1 Jobs from MSX
2 [Uncategorized (Multi-Server)]
3 Database Maintenance
4 Web Assistant
5 Full-Text
6 Log Shipping
7 Database Engine Tuning Advisor
10 REPL-Distribution
11 REPL-Distribution Cleanup
12 REPL-History Cleanup
13 REPL-LogReader
14 REPL-Merge
15 REPL-Snapshot
16 REPL-Checkup
17 REPL-Subscription Cleanup
18 REPL-Alert Response
19 REPL-QueueReader
20 Replication
98 [Uncategorized]
99 [Uncategorized]
*/