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

OracleÓëDB2ÖÐÐòÁд¦Àí

1¡¢ÐòÁж¨Òå    
   ORACLE:   
             CREATE SEQUENCE <sequence_name>
          INCREMENT BY <integer>
              START WITH <integer>
           MAXVALUE <integer> / NOMAXVALUE
           MINVALUE <integer> / NOMINVALUE
              CYCLE / NOCYCLE
              CACHE <#> / NOCACHE
              ORDER / NOORDER;   
    
   DB2:    
             CREATE SEQUENCE <sequence-name> 
                 AS data-type                           ĬÈÏ As Integer
              START WITH <numeric-constant>   
          INCREMENT BY <numeric-constant>               Ä¬ÈÏ INCREMENT BY 1
           MINVALUE <numeric-constant> | NO MINVALUE    Ä¬ÈÏ NO MINVALUE
           MAXVALUE <numeric-constant> | NO MAXVALUE    Ä¬ÈÏ NO MAXVALUE


Ïà¹ØÎĵµ£º

oracle cursor_sharing²ÎÊý

ÏÈÀ´¿´¿´¹Ù·½ÎĵµÖжÔÕâ¸ö²ÎÊýµÄ½âÊÍ
CURSOR_SHARING
PropertyDescription
Parameter type
String
Syntax
CURSOR_SHARING = { SIMILAR | EXACT | FORCE }
Default value
EXACT
Modifiable
ALTER SESSION, ALTER SYSTEM
Basic
No
CURSOR_SHARING determines what kind of SQL statements can share the same cu ......

OracleÊý¾Ý¿âÖеÄ''ÓëNULLµÄ¹ØÏµ

ÔÚOracleÊý¾Ý¿âÖÐ''ÓëNULLÊǵȼ۵ġ£¾ù±íʾ¿ÕÖµ£¬¶ø²»ÊÇÀàËÆÆäËûÊý¾Ý¿âÉÏ''±íʾ¿Õ´®£¬NULL±íʾ¿ÕÖµ¡£
 
ORACLEÔÊÐíÈκÎÒ»ÖÖÊý¾ÝÀàÐ͵Ä×Ö¶ÎΪ¿Õ£¬³ýÁËÒÔÏÂÁ½ÖÖÇé¿ö£º
1¡¢Ö÷¼ü×ֶΣ¨primary key£©£¬
2¡¢¶¨ÒåʱÒѾ­¼ÓÁËNOT NULLÏÞÖÆÌõ¼þµÄ×Ö¶Î
 
˵Ã÷£º
1¡¢NULLµÈ¼ÛÓÚûÓÐÈκÎÖµ¡¢ÊÇδ֪Êý¡£
2¡¢NULLÓë ......

oracleÁÙʱ±íµÄÓ÷¨×ܽá

ǰ¶Îʱ¼ä£¬Ð¹«Ë¾µÄÃæÊÔ¹ÙÎÊÁËÒ»¸öÎÊÌ⣬ÁÙʱ±íµÄ×÷Óã¬ÒÔǰÎÒÃÇÓûº´æÖмäÊý¾Ýʱºò£¬¶¼ÊÇ×Ô¼º½¨Ò»¸öÁÙʱ±í¡£Æäʵoracle±¾ÉíÔÚÕâ·½Ãæ¾ÍÒѾ­¿¼ÂǺÜÈ«ÁË£¬³ý·ÇÓÐЩ¸ß¼¶Ó¦Óã¬ÎÒÔÙ¿¼ÂÇ×Ô¼º´´½¨ÁÙʱ±í¡£ÓÉÓÚ±¾È˶ÔÁÙʱ±íµÄÁ˽ⲻÊǺܶ࣬ÓÚÊÇ»ØÀ´ËѼ¯ÏÂÕâ·½ÃæµÄ×ÊÁÏ£¬ÃÖ²¹ÏÂÕâ¿éµÄ²»×ã¡£
1¡¢Ç°ÑÔ
 
    ......

Oracle Dimension £¨Oracle ά£©

 
ÔÚÊý¾Ý²Ö¿â»·¾³ÖУ¬ÎÒÃÇͨ³£ÀûÓÃÎﻯÊÓͼǿ´óµÄ²éÑ¯ÖØÐ´¹¦ÄÜÀ´ÌáÉýͳ¼Æ²éѯµÄÐÔÄÜ£¬µ«ÊÇÎﻯÊÓͼµÄ²éÑ¯ÖØÐ´¹¦ÄÜÓÐʱºòÎÞ·¨ÖÇÄܵØÅжϲéѯÖÐһЩÏà¹ØÁªµÄÌõ¼þ£¬ÒÔÖÁÓÚÓ°ÏìÐÔÄÜ¡£±ÈÈçÎÒÃÇÓÐÒ»ÕÅÏúÊÛ±ísales£¬ÓÃÓÚ´æ´¢¶©µ¥µÄÏêϸÐÅÏ¢£¬°üº¬½»Ò×ÈÕÆÚ¡¢¹Ë¿Í±àºÅºÍÏúÊÛÁ¿¡£ÎÒÃÇ´´½¨Ò»ÕÅÎﻯÊÓͼ£¬°´Ô´洢ÀÛ¼ÆÏúÁ¿ÐÅÏ¢£¬¼ ......

oracle Êý¾Ý¹ÜÀí

 Ò»£º
ʹÓÃProfile¶ÔÓû§Session»á»°½øÐÐ×ÊÔ´ÏÞÖÆ
--µ«ÊÇÈç¹ûʹÓÃÁËÁ¬½Ó³ØÖ®ÀàµÄ¶«¶«£¬¾Í»á³öЩÎÊÌ⣬±ÈÈçǰ̨Á¬½Ó²»ÉÏÖ®ÀàµÄ
--http://www.eygle.com/archives/2008/10/profile_session_limit.html
sqlplus "/ as sysdba"
SQL> show parameter resource
SQL> alter system set resource_limit= ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ