--查詢CPU耗時最高的10個語句

SELECT TOP ( 10 )
        SUBSTRING(ST.text, ( QS.statement_start_offset / 2 ) + 1,
                  ( ( CASE statement_end_offset
                        WHEN -1 THEN DATALENGTH(st.text)
                        ELSE QS.statement_end_offset
                      END - QS.statement_start_offset ) / 2 ) + 1) AS 執行語句,
        execution_count ,
        total_worker_time / 1000 AS total_worker_time_ms ,
        ( total_worker_time / 1000 ) / execution_count AS avg_worker_time_ms ,
        total_logical_reads ,
        total_logical_reads / execution_count AS avg_logical_reads ,
        total_elapsed_time / 1000 AS total_elapsed_time_ms ,
        ( total_elapsed_time / 1000 ) / execution_count AS avg_elapsed_time_ms ,
        qp.query_plan as 執行計劃
FROM    sys.dm_exec_query_stats qs
        CROSS APPLY sys.dm_exec_sql_text(qs.sql_handle) st
        CROSS APPLY sys.dm_exec_query_plan(qs.plan_handle) qp
ORDER BY total_worker_time DESC
 

注：摘錄於《SQL server 效能優化及管理藝術》