SQL server performance analysis, view slow queries

--  This is to view the execution process analysis of a statement 
set showplan_all on
select * from  iexec.local_quality_web.commonality_queue where Analysis_Type = 'PTAM' and  Part_Num like '%NYJA0088%'

use master  --  Switch database   Then execute the following statement , You can see which statements execute slowly 
SELECT TOP 20

        total_worker_time/1000 AS [ Total consumption CPU  Time (ms)],execution_count [ Number of runs ],
        qs.total_worker_time/qs.execution_count/1000 AS [ Average consumption CPU  Time (ms)],
    last_execution_time AS [ Last execution time ],max_worker_time /1000 AS [ Maximum execution time (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 [ Use CPU The grammar of ], qt.text [ Complete grammar ],
    dbname=db_name(qt.dbid),
    object_name(qt.objectid,qt.dbid) ObjectName
FROM sys.dm_exec_query_stats qs WITH(nolock)
         CROSS apply sys.dm_exec_sql_text(qs.sql_handle) AS qt
WHERE execution_count>1
ORDER BY  total_worker_time DESC