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

oracle·Ö×麯ÊýÖ®ROLLUP

 
1.³õʼ»¯ÊµÑ黵¾³
1£©´´½¨²âÊÔ±ígroup_test
sec@ora10g> create table group_test (group_id int, job varchar2(10), name varchar2(10), salary int);
¡¡
Table created.
¡¡
2£©³õʼ»¯Êý¾Ý
insert into group_test values (10,'Coding',    'Bruce',1000);
insert into group_test values (10,'Programmer','Clair',1000);
insert into group_test values (10,'Architect', 'Gideon',1000);
insert into group_test values (10,'Director',  'Hill',1000);
¡¡
insert into group_test values (20,'Coding',    'Jason',2000);
insert into group_test values (20,'Programmer','Joey',2000);
insert into group_test values (20,'Architect', 'Martin',2000);
insert into group_test values (20,'Director',  'Michael',2000);
¡¡
insert into group_test values (30,'Coding',    'Rebecca',3000);
insert into group_test values (30,'Programmer','Rex',3000);
insert into group_test values (30,'Architect', 'Richard',3000);
insert into group_test values (30,'Director',  'Sabrina',3000);
¡¡
insert into group_test values (40,'Coding',    'Samuel',4000);
insert into group_test values (40,'Programmer','Susy',4000);
insert into group_test values (40,'Architect', 'Tina',4000);
insert into group_test values (40,'Director',  'Wendy',4000);
¡¡
commit;
¡¡
3£©³õʼ»¯Ö®ºóµÄÊý¾ÝÇé¿öÈçÏ£º
sec@ora10g> select * from group_test;
¡¡
  GROUP_ID JOB        NAME           SALARY
---------- ---------- ---------- ----------
        10 Coding     Bruce            1000
        10 Programmer Clair            1000
        10 Architect  Gideon           1000


Ïà¹ØÎĵµ£º

oracle ±í¿Õ¼ä²Ù×÷

oracle±í¿Õ¼ä²Ù×÷Ïê½â
  1
  2
  3×÷Õߣº   À´Ô´£º    ¸üÐÂÈÕÆÚ£º2006-01-04 
  5
  6 
  7½¨Á¢±í¿Õ¼ä
  8
  9CREATE TABLESPACE data01
 10DATAFILE '/ora ......

ORACLE°²×°²ÎÊý˵Ã÷¼°×¢ÒâÊÂÏ

Ô­ÎĵØÖ·£ºhttp://blog.csdn.net/fengyun14/archive/2007/03/25/1540433.aspx
¹ØÓÚLinux ÏÂkernel.shmmax µÄÉèÖÃÎÊÌâ
ÏÂÃæÊÇOracle ÎĵµÉϵĽâÊÍ£¬ http://download-west.oracle.com/doc...e.htm#sthref107
SHMMAX Available physical memory Defines the maximum allowable size of one shared memory segment.
The ......

OracleÖÐΪʲôwhere rownum > 3 ²éÕÒ²»µ½Êý¾Ý£¿

²éѯ±íempÖÐËùÓÐÊý¾Ý
select emp_id,rownum from emp
µÚÒ»²½£¬²éѯ½á¹û,rownum´ý¶¨
emp_id rownum
1         ?   1
2         ?   2
3         ?   3
4&n ......

hibernateÖÐoracleµÄ×ÔÔöÎÊÌ⣺

Ò»Ö±ÒÔΪ  <id name="id" type="integer">
<column name="ID" precision="5" scale="0" />
<generator class="sequence"¡¡/>
</id> ÕâÑù¾Í¿ÉÒÔ×ÔÔöÁË¡£¡£
¿É½ñÌìÔÚ²âÊÔʱ£¬·¢ÏÖ¿ØÖÆÌ¨Ò»Ö±±¨“ÐòÁкŲ»´æÔÚ"µÄ´í¡£¡£¡£ºóÀ´²ÅÖªµÀÔÚsequenceºóà ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ