Delete SQL Agent Job History

-- delete sql agent job history for named job

EXEC msdb.dbo.sp_purge_jobhistory @job_name = N'data load' ;


-- delete sql agent job history for named job, with date parameters

EXEC dbo.sp_purge_jobhistory  @job_name = N'data load', @oldest_date = '2008-12-31'
 

-- delete all sql agent job history

EXEC msdb.dbo.sp_purge_jobhistory