--SQL SERVER 占用资源高的SQL语句：

--查询占用cpu高的前 50 个 SQL 语句

SELECT total_cpu_time,[total_physical_Reads], total_execution_count, number_of_statements, s2.text

      --(SELECT SUBSTRING(s2.text, statement_start_offset / 2, ((CASE WHEN statement_end_offset = -1 THEN (LEN(CONVERT(NVARCHAR(MAX), s2.text)) * 2) ELSE statement_end_offset END) - statement_start_offset) / 2) ) AS query_text

FROM

      (SELECT TOP 50

            SUM(qs.total_worker_time) AS total_cpu_time,

            SUM(total_physical_reads) AS [total_physical_Reads],

            SUM(qs.execution_count) AS total_execution_count,

            COUNT(*) AS  number_of_statements,

            qs.sql_handle --,

            --MIN(statement_start_offset) AS statement_start_offset,

            --MAX(statement_end_offset) AS statement_end_offset

      FROM

            sys.dm_exec_query_stats AS qs

      GROUP BY qs.sql_handle

      ORDER BY SUM(qs.total_worker_time) DESC) AS stats

      CROSS APPLY sys.dm_exec_sql_text(stats.sql_handle) AS s2

--------------------------------------------------------------------

--查询物理IO高的前 50 个 SQL 语句

SELECT total_cpu_time, total_physical_Reads , total_execution_count, number_of_statements, s2.text

      --(SELECT SUBSTRING(s2.text, statement_start_offset / 2, ((CASE WHEN statement_end_offset = -1 THEN (LEN(CONVERT(NVARCHAR(MAX), s2.text)) * 2) ELSE statement_end_offset END) - statement_start_offset) / 2) ) AS query_text

FROM

      (SELECT TOP 50

            SUM(qs.total_worker_time) AS total_cpu_time,

            SUM(total_physical_reads) AS [total_physical_Reads],

            SUM(qs.execution_count) AS total_execution_count,

            COUNT(*) AS  number_of_statements,

            qs.sql_handle --,

            --MIN(statement_start_offset) AS statement_start_offset,

            --MAX(statement_end_offset) AS statement_end_offset

      FROM

            sys.dm_exec_query_stats AS qs

      GROUP BY qs.sql_handle

      ORDER BY SUM(qs.total_physical_Reads) DESC) AS stats

      CROSS APPLY sys.dm_exec_sql_text(stats.sql_handle) AS s2