非常好用的sql语句(日常整理)

1. /* 得到trace文件路径和名称 */

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 

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