SQLServer查询耗时sql语句

SELECT TOP 50

qs.total_worker_time/qs.execution_count as [Avg CPU Time],

SUBSTRING(qt.text,qs.statement_start_offset/2,

(case when qs.statement_end_offset = -1

then len(convert(nvarchar(max), qt.text)) * 2

else qs.statement_end_offset end -qs.statement_start_offset)/2)

as query_text,

qt.dbid, dbname=db_name(qt.dbid),

qt.objectid

FROM sys.dm_exec_query_stats qs

cross apply sys.dm_exec_sql_text(qs.sql_handle) as qt

ORDER BY [Avg CPU Time] DESC