代码列表 4.5：显示累计最消耗 CPU 时间的前50个运行计划

SELECT TOP 50
	total_worker_time/1000 AS [总消耗CPU 时间(ms)],execution_count [运行次数],
	qs.total_worker_time/qs.execution_count/1000. as [平均消耗CPU 时间(ms)],
	SUBSTRING(qt.text,qs.statement_start_offset/2+1, 
		(case when qs.statement_end_offset = -1 
		then DATALENGTH(qt.text) 
		else qs.statement_end_offset end -qs.statement_start_offset)/2 + 1) 
	as [使用CPU的语法], qt.text [完整语法],
	qt.dbid, dbname=db_name(qt.dbid),
	qt.objectid,object_name(qt.objectid), object_name(qt.dbid) ObjectName
 
FROM sys.dm_exec_query_stats qs
cross apply sys.dm_exec_sql_text(qs.sql_handle) as qt
ORDER BY 
        total_worker_time DESC