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Oracle ¿Í»§¶ËÅäÖüàÌý(TNSNames.oraÉèÖÃ)

¢Ù Ö»ÐèÔÚÎļþ TNSNames.ora ÖмÓÈëÒÔϽڵ㣬¼´¿É³É¹¦ÅäÖüàÌý
ORCL190 =  //ºìÉ«²¿ÃÅΪÁ¬½Ó¼àÌýÃû×Ö
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.190)(PORT = 1521))  //ºìÉ«²¿ÃÅΪ·þÎñÆ÷ËùÔÚIPµØÖ· 1521Ϊ¶Ë¿ÚºÅ
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = orcl) //ºìÉ«²¿ÃÅΪÊý¾Ý¿âÃû
    )
  )
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Oracle¸´ÔÓ²éѯ

1¡¢²éѯÁ½¸öÈÕÆÚÖ®¼äµÄÊý¾Ý¡£
¼ÙÉèÓбíTable1£¬Æä´´½¨±íµÄsqlÓï¾äΪ£º
create table Table1(
StationID    NUMBER(10) Primary key,
Year           NUMBER(4)  not null,
Month        NUMBER(2)  n ......

Oracle waits event:DB File Sequential Read

The DB File Sequential Read wait event generally indicates a single block read (an index read,
for example). A large number could indicate poor joining orders of tables or unselective indexing.
This number will certainly be large (normally) for a high-transaction, well-tuned system. You ......

OracleºÍMySQL¡¢PostgreSQLÌØÐÔ¶Ô±È

¡¡Ëæ×ÅÏÖ´úÊý¾Ý¿â¿ÉÓÃÌØÕ÷¼¯µÄѸËÙÔö¼Ó£¬ºÜÄÑÇø·ÖÊëºÃÊ뻵¡£ÀýÈçOracleÀï¾ÍÓÐÐí¶àÄã¿ÉÄÜ´ÓÀ´¶¼²»ÐèÒªµÄ¸ß¼¶Êý¾Ý²Ö¿âÌØÕ÷¡£´ËÍâÒ²¿ÉÄÜÓÐһЩÆäËü²»¿É»òȱµÄÌØÕ÷±ÈÈçACIDÊÂÎñÌØÐÔ¡£ÎÒÃÇÀ´¿´Ò»¿´Ö÷ÒªµÄÒ»Ð©ÌØÕ÷£¬±ÈÈç´æ´¢¹ý³Ì£¬ÊÓͼ£¬¿ìÕÕ£¬±íÊý¾ÝÀàÐͺÍÊÂÎñµÈµÈ¡£Í¬Ê±ÎÒÃÇ·ÖÎöÒ»ÏÂPostgresql£¬MySQLºÍOracleÕ⼸¸öÊý¾Ý¿â£¬È»º ......

oracle raw device create tablespace

  
[root@vmfs sysconfig]# lvdisplay |grep db_d
  LV Name                /dev/db_v4/db_d_22
  LV Name                /dev/db_v4 ......

OracleÓû§¹ÜÀí

--´´½¨±í¿Õ¼ä
create tablespace Ãû³Æ
(
datafile='·¾¶\Ãû³Æ.ora',
size='50M',
autoextend='on'
)
/
--´´½¨ÁÙʱ±í¿Õ¼ä
create temporary tablespace Ãû³Æ
(
tempfile='·¾¶\Ãû³Æ.ora',
size='50M',
autoextend='on'
)
/
--´´½¨Óû§
create user Óû§Ãû  idtenified  by ÃÜÂë
/
--ΪÓû§Ö¸¶¨ ......
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