Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

¡¾×ª¡¿ OracleÈ«¾ÖË÷ÒýºÍ±¾µØË÷Òý

OracleË÷Òý·ÖÇøÔÓ̸
<> OracleÊý¾Ý¿âÖУ¬ÓÐÁ½ÖÖÀàÐ͵ķÖÇøË÷Òý£¬È«¾ÖË÷ÒýºÍ±¾µØË÷Òý£¬ÆäÖб¾µØË÷ÒýÓÖ¿ÉÒÔ·ÖΪ±¾µØÇ°×ºË÷ÒýºÍ±¾µØ·Çǰ׺Ë÷Òý¡£ÏÂÃæ¾Í·Ö±ð¿´¿´Ã¿ÖÖÀàÐ͵ÄË÷Òý¸÷×ÔµÄÌØµã¡£
È«¾ÖË÷ÒýÒÔÕû¸ö±íµÄÊý¾ÝΪ¶ÔÏó½¨Á¢Ë÷Òý£¬Ë÷Òý·ÖÇøÖеÄË÷ÒýÌõÄ¿¼È¿ÉÄÜÊÇ»ùÓÚÏàͬµÄ¼üÖµµ«ÊÇÀ´×Ô²»Í¬µÄ·ÖÇø£¬Ò²¿ÉÄÜÊǶà¸ö²»Í¬¼üÖµµÄ×éºÏ¡£
È«¾ÖË÷Òý¼ÈÔÊÐíË÷Òý·ÖÇøµÄ¼üÖµºÍ±í·ÖÇø¼üÖµÏàͬ£¬Ò²¿ÉÒÔ²»Ïàͬ¡£È«¾ÖË÷ÒýºÍ±íÖ®¼äûÓÐÖ±½ÓµÄÁªÏµ£¬ÕâÒ»µãºÍ±¾µØË÷Òý²»Í¬¡£
SQL> create table orders (
     order_no      number,
     part_no       varchar2(40),
     ord_date      date
     )
     partition by range (ord_date)
      (partition Q1 values less than (TO_DATE('01-APR-1999','DD-MON-YYYY')),
       partition Q2 values less than (TO_DATE('01-JUL-1999','DD-MON-YYYY')),
       partition Q3 values less than (TO_DATE('01-OCT-1999','DD-MON-YYYY')),
       partition Q4 values less than (TO_DATE('01-JAN-2000','DD-MON-YYYY'))
      )
     ;
Table created.
SQL> create index orders_global_1_idx
     on orders(ord_date)
      global partition by range (ord_date)
       (partition GLOBAL1 values less than (TO_DATE('01-APR-1999','DD-MON-YYYY')),
        partition GLOBAL2 values less than (TO_DATE('01-JUL-1999','DD-MON-YYYY')),
        partition GLOBAL3 values less than (TO_DATE('01-OCT-1999','DD-MON-YYYY')),
        partition GLOBAL4 values less than (MAXVALUE)
       )
     ;
Index created.
SQL> create index orders_global_2_idx
&n


Ïà¹ØÎĵµ£º

±±´óÇàÄñoracleѧϰ±Ê¼Ç14 15

oracle°²È«
Óû§¹ÜÀí
DBAÊÚÓ費ͬÓû§²»Í¬È¨Àû£¬Ã¿¸öÓû§¿ÉÒÔÔÚÊÚȨ·¶Î§Äڻ£¬Èκγ¬Ô½È¨ÏÞ·¶Î§µÄ²Ù×÷¶¼ÊÓΪ·Ç·¨¡£
sysÓû§  ÍøÂç¹ÜÀíÔ± ÓµÓÐ×î¸ßȨÏÞ
conn sys/¿ÚÁî as sysdba;
systemÓû§ ±¾µØ¹ÜÀíÔ±
scottÓû§  Ê¾ÀýÊý¾Ý¿â
½¨Á¢Óû§£º£¨±ØÐëÓµÓÐdbaȨÏÞ£©
Create User Óû§Ãû Identified by ¿ÚÁî [E ......

ORACLEÊý¾Ý¿â²åÈëÐÔÄܲâÊÔ


²âÊÔ»·¾³»ù±¾ÐÅÏ¢£º
OS£ºWindows XP sp3
DB£ºOracle 9.2.0.1 Î´ÆôÓù鵵
DBÖØ×öÈÕÖ¾Îļþ´óС£º100MB
Ó²ÅÌÐͺţºSAMSUNG HD161GJ£¨SATA-300,160G,7200rpm,8M cache£©
CPU£ºIntel Core2 E8400£¨3.0G£©
Äڴ棺2G
 
ͨ¹ýHD TuneµÃµ½µÄÓ²ÅÌ»ù±¾²âÊÔÐÅÏ¢£¬
IOPS£º66
¶ÁÈ¡£º90MB/s
дÈ룺82MB/s
 
² ......

Oracle¸ß¼¶¼¼ÇÉ

1.ÔÚɾ³ýÒ»¸ö±íÖеÄÈ«²¿Êý¾Ýʱ£¬ÐëʹÓÃTRUNCATE TABLE ±íÃû;ÒòΪÓÃDROP TABLE£¬DELETE * from ±íÃûʱ£¬TABLESPACE±í¿Õ¼ä¸Ã±íµÄÕ¼Óÿռ䲢δÊÍ·Å£¬·´¸´¼¸´ÎDROP£¬DELETE²Ù×÷ºó£¬¸ÃTABLESPACEÉϰÙÕ׵Ŀռä¾Í±»ºÄ¹âÁË¡£
¡¡¡¡
¡¡¡¡2.having ×Ó¾äµÄÓ÷¨
¡¡¡¡
¡¡¡¡having ×Ó¾ä¶Ô group by ×Ó¾äËùÈ·¶¨µÄÐÐ×é½øÐпØÖÆ,having ×Ó ......

oracle Set ÃüÁî½éÉÜ

oracle Set ÃüÁî½éÉÜ
http://luoke920.javaeye.com/blog/323743
1). ÉèÖõ±Ç°sessionÊÇ·ñ¶ÔÐ޸ĵÄÊý¾Ý½øÐÐ×Ô¶¯Ìá½»
SQL>SET AUTO[COMMIT] {ON|OFF|IMM[EDIATE]| n}
2)£®ÔÚÓÃstartÃüÁîÖ´ÐÐÒ»¸ösql½Å±¾Ê±£¬ÊÇ·ñÏÔʾ½Å±¾ÖÐÕýÔÚÖ´ÐеÄSQLÓï¾ä
SQL> SET ECHO {ON|OFF}
3).ÊÇ·ñÏÔʾµ±Ç°sqlÓï¾ä²éѯ»òÐ޸ĵÄÐÐÊý ......

´øÄãÇáËɽӴ¥OracleÖ´Ðмƻ®µÄÏà¹Ø¸ÅÄî

OracleÖ´Ðмƻ®µÄÏà¹Ø¸ÅÄ
rowid£ºÏµÍ³¸øoracleÊý¾ÝµÄÿÐи½¼ÓµÄÒ»¸öαÁУ¬°üº¬Êý¾Ý±íÃû³Æ£¬Êý¾Ý¿âid£¬´æ´¢Êý¾Ý¿âidÒÔ¼°Ò»¸öÁ÷Ë®ºÅµÈÐÅÏ¢£¬rowidÔÚÐеÄÉúÃüÖÜÆÚÄÚΨһ¡£
recursive sql£ºÎªÁËÖ´ÐÐÓû§Óï¾ä£¬ÏµÍ³¸½¼ÓÖ´ÐеĶîÍâ²Ù×÷Óï¾ä£¬Æ©Èç¶ÔÊý¾Ý×ÖµäµÄά»¤µÈ¡£
row source£¨ÐÐÔ´£©£ºoracleÖ´Ðв½Öè¹ý³ÌÖУ¬ÓÉÉÏÒ» ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ