SELECT b.sid oracleID,    b.username 登錄Oracle用戶名,    b.serial#,    spid 操作系統ID,    paddr,    sql_text 正在執行的SQL,    b.machine 計算機名FROM v$process a, v$session b, v$sqlarea cWHERE a.addr = b.paddr  AND b.sql_hash_value = c.hash_value

select a.username, a.sid,b.SQL_TEXT, b.SQL_FULLTEXT from v$session a, v$sqlarea b where a.sql_address = b.address ---執行過的select b.SQL_TEXT,b.FIRST_LOAD_TIME,b.SQL_FULLTEXT from v$sqlarea bwhere b.FIRST_LOAD_TIME between '2016-10-1/09:24:47' and    '2016-10-1/09:24:47' order by b.FIRST_LOAD_TIME

select OSUSER,PROGRAM,USERNAME,SCHEMANAME,B.Cpu_Time,STATUS,B.SQL_TEXT from V$SESSION A LEFT JOIN V$SQL B ON A.SQL_ADDRESS=B.ADDRESS AND A.SQL_HASH_VALUE=B.HASH_VALUE order by b.cpu_time desc select address, sql_text, piece  from v$session, v$sqltext where address = sql_address  -- and machine = < you machine name > order by address, piece 

SELECT OSUSER 電腦登錄身份,    PROGRAM 發起請求的程序,    USERNAME 登錄系統的用戶名,    SCHEMANAME,    B.Cpu_Time 花費cpu的時間,    STATUS,    B.SQL_TEXT 執行的sqlFROM V$SESSION ALEFT JOIN V$SQL B ON A.SQL_ADDRESS = B.ADDRESS          AND A.SQL_HASH_VALUE = B.HASH_VALUEORDER BY b.cpu_time DESC

SELECT l.session_id sid,    s.serial#,    l.locked_mode 鎖模式,    l.oracle_username 登錄用戶,    l.os_user_name 登錄機器用戶名,    s.machine 機器名,    s.terminal 終端用戶名,    o.object_name 被鎖對象名,    s.logon_time 登錄數據庫時間FROM v$locked_object l, all_objects o, v$session sWHERE l.object_id = o.object_id  AND l.session_id = s.sidORDER BY sid, s.serial#;

alter system kill session 'sid， s.serial#‘;

SELECT * FROM (select PARSING_USER_ID,EXECUTIONS,SORTS, COMMAND_TYPE,DISK_READS,sql_text FROM v$sqlarea order BY disk_reads DESC )where ROWNUM<10 ; 

SELECT se.sid,se.serial#,pr.SPID,se.username,se.status, se.terminal,se.program,se.MODULE,、se.sql_address,st.event,st. p1text,si.physical_reads, si.block_changes FROM v$session se,v$session_wait st, v$sess_io si,v$process pr WHERE st.sid=se.sid AND st. sid=si.sid AND se.PADDR=pr.ADDR AND se.sid>6 AND st. wait_time=0 AND st.event NOT LIKE '%SQL%' ORDER BY physical_reads DESC