1. /* 得到trace文件路徑和名稱 */

SELECT d.VALUE|| 'http://www.companysz.com/'|| LOWER (RTRIM (i.INSTANCE, CHR (0)))|| '_ora_'|| p.spid|| '.trc' trace_file_name FROM (SELECT p.spidFROM v$mystat m, v$session s, v$process pWHERE m.statistic# = 1 AND s.SID = m.SID AND p.addr = s.paddr) p,(SELECT t.INSTANCEFROM v$thread t, v$parameter vWHERE v.NAME = 'thread'AND (v.VALUE = 0 OR t.thread# = TO_NUMBER (v.VALUE))) i,(SELECT VALUEFROM v$parameterWHERE NAME = 'user_dump_dest') d

2./* 顯示產生鎖定的sql語句 */

select /*+ NO_MERGE(a) NO_MERGE(b) NO_MERGE(c) */ a.username, a.machine, a.sid,a.serial#, a.last_call_et "Seconds", b.id1, c.sql_text "SQL" from v$session a, v$lock b,v$sqltext c where a.username is not null and a.lockwait = b.kaddr and c.hash_value =a.sql_hash_value;

3./* 查看oracle隱藏參數 */

select name,value,decode(isdefault, 'TRUE', 'Y', 'N') as "Default",decode(ISEM, 'TRUE', 'Y', 'N') as SesMod,decode(ISYM, 'IMMEDIATE', 'I', 'DEFERRED', 'D', 'FALSE', 'N') as SysMod,decode(IMOD, 'MODIFIED', 'U', 'SYS_MODIFIED', 'S', 'N') as Modified,decode(IADJ, 'TRUE', 'Y', 'N') as Adjusted,description from ( --GV$SYSTEM_PARAMETERselect x.inst_id as instance,x.indx + 1,ksppinm as name,ksppity,ksppstvl as value,ksppstdf as isdefault,decode(bitand(ksppiflg / 256, 1), 1, 'TRUE', 'FALSE') as ISEM,decode(bitand(ksppiflg / 65536, 3),1,'IMMEDIATE',2,'DEFERRED','FALSE') as ISYM,decode(bitand(ksppstvf, 7), 1, 'MODIFIED', 'FALSE') as IMOD,decode(bitand(ksppstvf, 2), 2, 'TRUE', 'FALSE') as IADJ,ksppdesc as descriptionfrom x$ksppi x, x$ksppsv ywhere x.indx = y.indxand substr(ksppinm, 1, 1) = '_'and x.inst_id = USERENV('Instance')) order by name;

4./* 根據系統中oracle的pid來查看sql */

select /*+ ORDERED */ sql_text from v$sqltext a where (a.hash_value,a.address) IN (select decode (sql_hash_value,0,prev_hash_value,sql_hash_value),decode (sql_hash_value,0,prev_sql_addr,sql_address) from v$session b where b.paddr =( select addr from v$process c where c.spid = '&pid')) order by piece ASC;

以上就是本文給大家分享幾個比較好用sql語句，希望大家喜歡。