sqlserver-查询备份进度

SELECT   DB_NAME(er.[database_id]) [DatabaseName],  
er.[command] AS [CommandType],  
er.[percent_complete],  er.start_time,
CONVERT(DECIMAL(5, 2), er.[percent_complete]) AS [Complete_Percent]  
,CONVERT(DECIMAL(38, 2), er.[total_elapsed_time] / 60000.00) AS [ElapsedTime_m]  
,CONVERT(DECIMAL(38, 2), er.[estimated_completion_time] / 60000.00) AS [EstimatedCompletionTime_m]  
FROM sys.dm_exec_requests AS er  
WHERE --DB_NAME(er.[database_id]) in (‘xxxx’) and
er.[command] in ( ‘RESTORE DATABASE’ ,‘BACKUP DATABASE’)
order by er.start_time desc