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Common sql statements specific what, I believe that many inexperienced people are helpless about this, this article summarizes the causes of the problem and solutions, through this article I hope you can solve this problem.

1. /* Get trace file path and name */

SELECT d.VALUE || '/' || LOWER (RTRIM (i.INSTANCE, CHR (0))) || '_ora_' || p.spid || '.trc' trace_file_name FROM (SELECT p.spid FROM v$mystat m, v$session s, v$process p WHERE m.statistic# = 1 AND s.SID = m.SID AND p.addr = s.paddr) p, (SELECT t.INSTANCE FROM v$thread t, v$parameter v WHERE v.NAME = 'thread' AND (v.VALUE = 0 OR t.thread# = TO_NUMBER (v.VALUE))) i, (SELECT VALUE FROM v$parameter WHERE NAME = 'user_dump_dest') d

2./* Show sql statements that generate locks */

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./* View oracle hidden parameters */

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$SYSTEM_PARAMETER select x.inst_id as instance, x.indx + 1, ksppinm as name, ksppity, ksppstvl as value, ksppstdf as isdefault, decode(bitand(ksppiflg / 256, 1), 1, 'TRUE', 'FALSE') as ISEM, decode(bitand(ksppiflg / 65536, 3), 1, 'IMMEDIATE', 2, 'DEFERRED', 'FALSE') as ISYM, decode(bitand(ksppstvf, 7), 1, 'MODIFIED', 'FALSE') as IMOD, decode(bitand(ksppstvf, 2), 2, 'TRUE', 'FALSE') as IADJ, ksppdesc as description from x$ksppi x, x$ksppsv y where x.indx = y.indx and substr(ksppinm, 1, 1) = '_' and x.inst_id = USERENV('Instance')) order by name;

4./* View sql */according to pid of oracle in system

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. pid ='& pid') order by piece ASC; After reading the above contents, do you know what methods are used in common sql statements? If you still want to learn more skills or want to know more related content, welcome to pay attention to the industry information channel, thank you for reading!

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