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28.4.1  ÊÖ¹¤Æô¶¯ºÍ¹Ø±ÕOracle·þÎñ
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oracle  870   1  0 11:54 ?   00:00:00 ora_pmon_orcl  //½ø³Ì¼à¿ØÆ÷½ø³Ì
oracle  872   1  0 11:54 ?   00:00:00 ora_vktm_orcl  //ʱÖÓ¸üнø³Ì
oracle  876   1  0 11:54 ?   00:00:00 ora_diag_orcl  //Êý¾Ý¿âÕï¶Ï½ø³Ì
oracle  878   1  0 11:54 ?   00:00:00 ora_dbrm_orcl  //Êý¾Ý¿â×ÊÔ´¹ÜÀí½ø³Ì
oracle  880   1  0 11:54 ?   00:00:00 ora_psp0_orcl  //½ø³Ì²úÉú
oracle  884   1  0 11:54 ?   00:00:03 ora_dia0_orcl  //ÁíÒ»¸öÊý¾Ý¿âÕï¶Ï½ø³Ì
oracle  886   1  0 11:54 ?   00:00:00 ora_mman_orcl  //Ö´ÐÐÊý¾Ý¿âµÄÄÚ²¿ÈÎÎñ
oracle  888   1  0 11:54 ?   00:00:00 ora_dbw0_orcl  //Êý¾Ý¿âд½ø³Ì
oracle  890   1  0 11:54 ?   00:00:01 ora_lgwr_orcl  //ÈÕÖ¾½ø³Ì
oracle  892   1  0 11:54 ?   00:00:01 ora_ckpt_orcl  //¼ì²éµã½ø³Ì
oracle  894   1  0 11:54 ?   00:00:04 ora_smon_orcl  //ϵͳ¼à¿Ø½ø³Ì
oracle  896   1  0 11:54 ?   00:00:00 ora_reco_orcl 
oracle  898   1  0 11:54 ?   00:00:05 ora_mmon_orcl  //ÊÕ¼¯SQL¶ÔÏóÐÅÏ¢
oracle  900   1  0 11:54 ?   00:00:00 ora_mmnl_orcl  //¸ºÔð½«SGAͳ¼ÆÐÅÏ¢Êä³ö                                                   //µ½Êý¾Ý¿â


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jdbcÁ¬½ÓOracle

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      ѧϰOracle DBAÒ²°ë¸ö¶àѧÆÚÁË£¬½ñÌìÃÍÈ»²Å·¢ÏÖ£¬Ô­À´ÎÒµÄÊ黹ÊǺÜеģ¬ÉϿβÙ×÷ʱºòÒ²Ö»ÊÇÖªµÀ´ó¸ÅÔõô×ö£¬µ«ÊÇÒªÕæµÄÈ«²¿×Ô¼º×ö£¬¶ø²»È¥·­Ê黹ÊÇÓÐÒ»¶¨µÄÄѶȵģ¬ËùÒÔÄØ£¬½ñÌ쿪ʼ½«DBA´ÓÍ·¸´Ï°Ò»±é£¬Í¬Ê±ÔÙ²Ù×÷Ò»±é¡£
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1) Instance in RESTRICTED SESSIONS mode?
¡¡¡¡Check if the instance is in restricted sessions mode:
¡¡¡¡select instance_name,logins from v$instance;
¡¡¡¡If logins=RESTRICTED, then:
¡¡¡¡alter system disable restricted session;
¡¡¡¡^-- Checked!
¡¡¡¡2) JOB_QUEUE_PROCESSES=0
¡¡¡¡Make sure th ......

OracleÖÐDecode()º¯ÊýʹÓü¼ÇÉ

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2¡¢ORACLE°²×°Â·¾¶Îª£ºC:\ORANT
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decode(Ìõ¼þ,Öµ1,·­ÒëÖµ1,Öµ2,·­ÒëÖµ2,...Öµn,·­ÒëÖµn,ȱʡֵ)
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IF Ìõ¼þ=Öµ1 THEN
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ELSIF Ìõ¼þ=Öµ2 THEN
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