在sql server 中查找一定时间段内访问数据库情况

SELECT TOP 30000
    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)],
    last_execution_time AS [最后一次执行时间],
    min_worker_time /1000 AS [最小执行时间(ms)],
    max_worker_time /1000 AS [最大执行时间(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,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 and qs.creation_time BETWEEN '2018-11-9 16:10:00' AND '2018-11-13 20:15:00'
ORDER BY (qs.total_worker_time/qs.execution_count/1000) DESC

就可以 找到花费时间最大的问题。优化方法减少调用时间。