Ò׽ؽØͼÈí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

Oracle¶¨ÒåÔ¼Êø Íâ¼üÔ¼Êø

 Íâ¼üÔ¼Êø±£Ö¤²ÎÕÕÍêÕûÐÔ¡£Íâ¼üÔ¼ÊøÏÞ¶¨ÁËÒ»¸öÁеÄÈ¡Öµ·¶Î§¡£Ò»¸öÀý×Ó¾ÍÊÇÏÞ¶¨ÖÝÃûËõдÔÚÒ»¸öÓÐÏÞÖµ¼¯ºÏÖУ¬Õâ¸öÖµ¼¯ºÏÊÇÁíÍâÒ»¸ö¿ØÖƽṹ——Ò»ÕŸ¸±í
    ÏÂÃæÎÒÃÇ´´½¨Ò»ÕŲÎÕÕ±í£¬ËüÌṩÁËÍêÕûµÄÖÝËõдÁÐ±í£¬È»ºóʹÓòÎÕÕÍêÕûÐÔÈ·±£Ñ§ÉúÃÇÓÐÕýÈ·µÄÖÝËõд¡£µÚÒ»ÕűíÊÇÖݲÎÕÕ±í£¬State×÷ΪÖ÷¼ü
CREATE TABLE state_lookup
(state      VARCHAR2(2),
  state_desc VARCHAR2(30)) TABLESPACE student_data;
ALTER TABLE state_lookup
  ADD CONSTRAINT pk_state_lookup PRIMARY KEY (state)
  USING INDEX TABLESPACE student_index;
    È»ºó²åÈ뼸ÐмǼ£º
INSERT INTO state_lookup VALUES ('CA', 'California');
INSERT INTO state_lookup VALUES ('NY', 'New York');
INSERT INTO state_lookup VALUES ('NC', 'North Carolina');
    ÎÒÃÇͨ¹ýʵÏÖ¸¸×Ó¹ØϵÀ´±£Ö¤²ÎÕÕÍêÕûÐÔ£¬Í¼Ê¾ÈçÏÂ
 ---------------   Íâ¼ü×ֶδæÔÚÓÚStudents±íÖÐ
|State_lookup  |  ÊÇState×Ö¶Î
---------------   Ò»¸öÍâ¼ü±ØÐë²ÎÕÕÖ÷¼ü»òUnique×Ö¶Î
 |           Õâ¸öÀý×ÓÖУ¬ÎÒÃDzÎÕÕµÄÊÇState×Ö¶Î
 |           ËüÊÇÒ»¸öÖ÷¼ü×ֶΣ¨²Î¿´DDL£©
           /|\
 ---------------
|  Students    |
 ---------------
    ÉÏͼÏÔʾÁËState_Lookup±íºÍStudents±í¼äÒ»¶Ô¶àµÄ¹Øϵ£¬State_Lookup±í¶¨ÒåÁËÖÝËõдͨÓü¯ºÏ——ÔÚ±íÖÐÿһ¸öÖݳöÏÖÒ»´Î¡£Òò´Ë£¬State_Lookup±íµÄÖ÷¼üÊÇState×ֶΡ£
    State_Lookup±íÖеÄÒ»¸öÖÝÃû¿ÉÒÔÔÚStudents±íÖгöÏÖ¶à´Î¡£ÓÐÐí¶àѧÉúÀ´×Ôͬһ¸öÖÝ£¬Ò»´Î£¬ÔÚ±íState_LookupºÍStudentsÖ®¼ä²ÎÕÕÍêÕûÐÔʵÏÖÁËÒ»¶Ô¶àµÄ¹Øϵ¡£
    Íâ¼üͬʱ±£Ö¤Students±íÖÐState×ֶεÄÍêÕûÐÔ¡£Ã¿Ò»¸öѧÉú×ÜÊÇÓиöState_lookup±íÖгÉÔ±µÄÖÝËõд¡£
    Íâ¼üÔ¼Êø´´½¨ÔÚ×Ó±í¡£ÏÂÃæÔÚstudents±íÉÏ´´½¨Ò»¸öÍâ¼üÔ¼Êø¡£State×ֶβÎÕÕstate_lookup±íµÄÖ÷¼ü¡£
    1¡¢´´½¨±í
CREATE TABLE students
(student_id&n


Ïà¹ØÎĵµ£º

´«ÖDz¥¿Í——Êý¾Ý¿âÖ®ORACLE£¨Ò»£©


Ò» Oracle¹«Ë¾¼ò½é 
OracleÊÇÒóÐæ³öÍÁµÄ¼×¹ÇÎÄ(oracle bone inscriptions)µÄÓ¢ÎÄ·­ÒëµÄµÚÒ»¸öµ¥´Ê
Oracle¹«Ë¾ÊÇÈ«Çò×î´óµÄÐÅÏ¢¹ÜÀíÈí¼þ¼°·þÎñ¹©Ó¦ÉÌ£¬³ÉÁ¢ÓÚ1977Ä꣬×ܲ¿Î»ÓÚÃÀ¹ú¼ÓÖÝ Redwood shore
Oracle¹«Ë¾ÒòÆ临ÔӵĹØϵÊý¾Ý¿â²úÆ·¶øÎÅÃû¡£OracleµÄ¹ØϵÊý¾Ý¿âÊÇÊÀ½çµÚÒ»¸öÖ§³ÖSQLÓïÑÔµÄÊý¾Ý¿â
OracleÔÚ³¬¹ý ......

SQLServerºÍOracleµÄ³£Óú¯Êý¶Ô±È

1.¾ø¶ÔÖµ 
S:select abs(-1) value
O:select abs(-1)  value from dual
2.È¡Õû(´ó) 
S:select ceiling(-1.001) value  
O:select ceil(-1.001)  value from dual
3.È¡Õû£¨Ð¡£© 
S:select floor(-1.001) value  
O:select floor(-1.001)  value from dual
4.È ......

SQLServerºÍOracleµÄ³£Óú¯Êý¶Ô±È

1.¾ø¶ÔÖµ
S:select abs(-1) value
O:select abs(-1) value from dual
2.È¡Õû(´ó)
S:select ceiling(-1.001) value
O:select ceil(-1.001) value from dual
3.È¡Õû£¨Ð¡£©
S:select floor(-1.001) value
O:select floor(-1.001) value from dual
4.È¡Õû£¨½ØÈ¡£©
S:select cast(-1.002 as int) value
O:selec ......

Oracle Connect ByÓ÷¨

Oracle Connect ByÓ÷¨
 
oracleÖеÄselectÓï¾ä¿ÉÒÔÓÃSTART WITH...CONNECT BY PRIOR×Ó¾äʵÏֵݹé²éѯ£¬connect by Êǽṹ»¯²éѯÖÐÓõ½µÄ£¬Æä»ù±¾Óï·¨ÊÇ£º
select ... from <TableName>
where <Conditional-1>
start with <Conditional-2>
connect by <Conditional-3>
;
<Conditi ......

ORACLE 10G for RHEL AS 4 °²×°(ÍêÕû°æ)

ORACLE 10G for RHEL AS 4 °²×°
ÑéÖ¤°²×°:¼ì²éORACLEËùÐèµÄ³ÌÐòÊÇ·ñ°²×°¾ùÒÑ°²×°(»ò¸ü¸ß°æ±¾)
compat-db-4.1.25-9.i386.rpm
compat-gcc-32-3.2.3-47.3.i386.rpm
compat-gcc-32-c++-3.2.3-47.3.i386.rpm
compat-libstdc++-33-3.2.3-47.3.i386.rpm
compat-oracle-rhel4-1.0-5.i386.rpm
gcc-3.4.3-9.EL4.i386.rpm
gli ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØͼ | ¸ÓICP±¸09004571ºÅ