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       machine   µÇ¼»úÆ÷Ãû,
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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¡£
      µÚÒ»Õ£¬Ñ§µÄÊÇOracleµÄÌåϵ½á¹¹£ ......

[Oracle 10g] ÉÁ»Ø»Ö¸´Çø (Flash Recovery Area)

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Oracle 10g ÓÐÒ»Ïîй¦ÄܳÆÎª:×Ô¶¯µÄ»ùÓÚ´ÅÅ̵ı¸·ÝÓë»Ö¸´( Automatic Disk-Based Backup and Recovery )¡£ÊµÏָù¦ÄܵĻù´¡Îª±¾ÎÄÒª½²ÊöµÄÉÁ»Ø»Ö¸´Çø( Flash Recovery Area )¡£ÉÁ»Ø»Ö¸´ÇøÊÇ Oracle 10g ÖеÄÐÂÊÂÎï¡£¼òµ¥µÄ˵£¬ÉÁ»Ø»Ö¸´ÇøÊÇÒ»¿éÓÃÒÔ´æ´¢»Ö¸´Ïà¹ØµÄÎļþµÄ´æ´¢¿Õ¼ä¡£ÔÊÐíÓû§¼¯Öд洢ËùÓлָ ......

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What circumstances we use ALL_ROWS and what circumstances we use FIRST_ROWS optimizer mode? This article is written in oracle9i.
First_rows attempts to optimize the query to get the very first row back to the client as fast as possible. This is good for an interactive client server environment wher ......

ORACLEµÄlpadº¯Êý¡¢rpadº¯ÊýÓ÷¨

ORACLEµÄlpadº¯Êý¡¢rpadº¯ÊýÓ÷¨
Óï·¨£ºselect lpad('12345678',1,'0') from dual;
·µ»Ø×Ö·û´®‘12345678’µÄ´Ó×ó±ß³¤¶ÈΪ1µÄ×Ö·û´®£¬Èç¹û²»¹»£¬×ó±ß²¹‘0’
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Oracle 10.1 Statistics

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In Oracle 9.2 there were 264 statistics; in Oracle 10.1 there are 332 statistics
The following table shows the 106 statistics that were added in Oracle 10.1:
 
Name
application wait time
cluster wait time
concurrency wait time
consistent gets direct
consistent ......
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