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    ORACLE_BASE
    ORACLE_HOME °²×°¹ý³ÌÖÐÏÔʾµÄoracle home Ŀ¼
    ORACLE_SID
    PATH=$PAHT£º$ORACLE_HOME/bin
    ÒÔ oracle Õ˺ŵǽ Linux£¬»òÕß´Ó root ÏÂÊäÈë su - oracle ±ä³É oracle ÕʺÅÖ´ÐÐÆô¶¯¹Ø±ÕÃüÁî
    1. Æô¶¯ºÍ¹Ø±Õ¼àÌý
    Æô¶¯¼àÌý£ºlsnrctl start
    ¹Ø±Õ¼àÌý£ºlsnrctl stop
    2. Æô¶¯ºÍÍ£Ö¹Êý¾Ý¿â
    Æô¶¯Êý¾Ý¿â£ºÔÚÖÕ¶ËÊäÈë sqlplus '/ as sysdba' ½øÈë sqlplus£¬ÔÚ sqlplus ÊäÈë startup
    Í£Ö¹Êý¾Ý¿â£ºÔÚ sqlplus ÊäÈë shutdown »òÕß shutdown immediate
    3. Æô¶¯ºÍÍ£Ö¹ dbconsole ·þÎñ
    Æô¶¯Ç°Ðè×¢ÒâOracleµÄidÊÇ·ñÕýÈ·
    windowsÏÂÃüÁîΪset ORACLE_SID=TEST
    AIXÏÂÃüÁîΪexport ORACLE_SID=TEST
    Æô¶¯ dbconsole ·þÎñ£º emctl start dbconsole
    Í£Ö¹ dbconsole ·þÎñ£º emctl stop dbconsole
    4. Æô¶¯ºÍÍ£Ö¹ iSQL*Plus isqlplusctl start | stop
    5. ÁгöOracle½ø³Ì
    ps -fu oracle


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oracle distinct

oracle distinct
¹Ø¼ü×Ö: distinctµÄһЩÔÓ̸
distinctÕâ¸ö¹Ø¼ü×ÖÀ´¹ýÂ˵ô¶àÓàµÄÖظ´¼Ç¼ֻ±£ÁôÒ»Ìõ£¬µ«ÍùÍùÖ»Óà ËüÀ´·µ»Ø²»Öظ´¼Ç¼µÄÌõÊý£¬¶ø²»ÊÇÓÃËüÀ´·µ»Ø²»ÖؼǼµÄËùÓÐÖµ¡£ÆäÔ­ÒòÊÇdistinctÖ»ÓÐÓöþÖØÑ­»·²éѯÀ´½â¾ö£¬¶øÕâÑù¶ÔÓÚÒ»¸öÊý¾ÝÁ¿·Ç³£´óµÄÕ¾À´Ëµ£¬ÎÞÒÉÊÇ»áÖ±½ÓÓ°Ï쵽ЧÂʵġ£
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Oracle job ¹ÜÀí

SVRMGR> select * from dba_jobs;
³õʼ»¯Ïà¹Ø²ÎÊýjob_queue_processes
alter system set job_queue_processes=39 scope=spfile;//×î´óÖµ²»Äܳ¬¹ý1000  ;job_queue_interval = 10  //µ÷¶È×÷ҵˢÐÂƵÂÊÃëΪµ¥Î»
DBA_JOBS describes all jobs in the database.
USER_JOBS describes all jobs owned by the c ......

OracleϵÄÖÐÎÄÅÅÐò


alter session set nls_sort='schinese_pinyin_m';
select * from dept order by
nlssort(name,'NLS_SORT=SCHINESE_PINYIN_M');
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OracleÖеÄdecodeÓ÷¨

OracleÖеÄdecodeÓ÷¨
Decode(Ìõ¼þ£¬Öµ1£¬ÏÔʾֵ1£¬Öµ2£¬ÏÔʾֵ2£¬…… Öµn£¬ÏÔʾֵn)
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select t.res_id,
       t.res_size || '(kb)' as res_size,
       decode(t.res_type,1,'Ä£°åÇø','0','ÎĵµÇø') res_type,
   ......
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