【MSSQL】最近執行的SQL

查詢目前正在執行的SQL語法

SELECT TOP 200 qs.creation_time,last_execution_time-creation_time as time,text 
FROM sys.dm_exec_query_stats as qs
CROSS APPLY sys.dm_exec_sql_text(qs.sql_handle) as st
ORDER BY qs.creation_time DESC

SELECT      r.scheduler_id as 排程器識別碼,
            status         as 要求的狀態,
            r.session_id   as SPID,
            r.blocking_session_id as BlkBy,
            substring(
    ltrim(q.text),
    r.statement_start_offset/2+1,
    (CASE
                 WHEN r.statement_end_offset = -1
                 THEN LEN(CONVERT(nvarchar(MAX), q.text)) * 2
                 ELSE r.statement_end_offset
                 END - r.statement_start_offset)/2)
                 AS [正在執行的 T-SQL 命令],
            r.cpu_time      as [CPU Time(ms)],
            r.start_time    as [開始時間],
            r.total_elapsed_time as [執行總時間],
            r.reads              as [讀取數],
            r.writes             as [寫入數],
            r.logical_reads      as [邏輯讀取數],
            -- q.text, /* 完整的 T-SQL 指令碼 */
            d.name               as [資料庫名稱]
FROM        sys.dm_exec_requests r 
   CROSS APPLY sys.dm_exec_sql_text(sql_handle) AS q
   LEFT JOIN sys.databases d ON (r.database_id=d.database_id)
WHERE       r.session_id > 50 AND r.session_id <> @@SPID
ORDER BY    r.total_elapsed_time desc

SELECT
A.SESSION_ID,DB_NAME(A.DATABASE_ID) AS DATABASE_NAME,
A.START_TIME,A.COMMAND,A.CPU_TIME,
A.PERCENT_COMPLETE,A.ESTIMATED_COMPLETION_TIME,B.TEXT

FROM SYS.DM_EXEC_REQUESTS A
CROSS APPLY
SYS.DM_EXEC_SQL_TEXT(A.SQL_HANDLE)AS B
WHERE SESSION_ID > 50

看哪個語法最花時間

SELECT TOP 10 total_worker_time, last_worker_time, 
max_worker_time, min_worker_time,
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 statement_text
FROM sys.dm_exec_query_stats as qs
CROSS APPLY sys.dm_exec_sql_text(qs.sql_handle) as st
ORDER BY max_worker_time DESC   

SELECT TOP 50
 [Average CPU used] = total_worker_time / qs.execution_count,
 [Total CPU used] = total_worker_time,
 [Execution count] = qs.execution_count,
 [Individual Query] = SUBSTRING (qt.text,qs.statement_start_offset/2, 
         (CASE WHEN qs.statement_end_offset = -1 
            THEN LEN(CONVERT(NVARCHAR(MAX), qt.text)) * 2 
          ELSE qs.statement_end_offset END - 
qs.statement_start_offset)/2)
,[Parent Query] = qt.text
,DatabaseName = DB_NAME(qt.dbid)
FROM sys.dm_exec_query_stats qs
CROSS APPLY sys.dm_exec_sql_text(qs.sql_handle) as qt
ORDER BY [Average CPU used] DESC;


WITH DB_CPU_Stats
AS
(SELECT DatabaseID, DB_Name(DatabaseID) AS [DatabaseName], 
  SUM(total_worker_time) AS [CPU_Time_Ms]
 FROM sys.dm_exec_query_stats AS qs
 CROSS APPLY (SELECT CONVERT(int, value) AS [DatabaseID] 
              FROM sys.dm_exec_plan_attributes(qs.plan_handle)
              WHERE attribute = N'dbid') AS F_DB
 GROUP BY DatabaseID)
SELECT ROW_NUMBER() OVER(ORDER BY [CPU_Time_Ms] DESC) AS [row_num],
       DatabaseName, [CPU_Time_Ms], 
       CAST([CPU_Time_Ms] * 1.0 / SUM([CPU_Time_Ms]) 
       OVER() * 100.0 AS DECIMAL(5, 2)) AS [CPUPercent]
FROM DB_CPU_Stats
WHERE DatabaseID > 4 -- system databases
AND DatabaseID <> 32767 -- ResourceDB
ORDER BY row_num OPTION (RECOMPILE);
SELECT 
substring(text,qs.statement_start_offset/2
,(CASE 
WHEN qs.statement_end_offset = -1 THEN len(convert(nvarchar(max), 
text)) * 2 
ELSE qs.statement_end_offset 
END - qs.statement_start_offset)/2) 
,qs.plan_generation_num as recompiles
,qs.execution_count as execution_count
,qs.total_elapsed_time - qs.total_worker_time as total_wait_time
,qs.total_worker_time as cpu_time
,qs.total_logical_reads as reads
,qs.total_logical_writes as writes
,last_execution_time
FROM sys.dm_exec_query_stats qs
CROSS APPLY sys.dm_exec_sql_text(qs.sql_handle) st
LEFT JOIN sys.dm_exec_requests r 
ON qs.sql_handle = r.sql_handle
ORDER BY total_wait_time DESC