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

ÐÞ¸ÄOracleµÄ½ø³ÌÊý[processes]¼°»á»°Êý[sessions]

ÐÞ¸ÄOracleµÄ½ø³ÌÊý[processes]¼°»á»°Êý[sessions]
1.ͨ¹ýSQLPlusÐÞ¸Ä
OracleµÄsessionsºÍprocessesµÄ¹ØÏµÊÇ
         sessions=1.1*processes + 5
ʹÓÃsys£¬ÒÔsysdbaȨÏ޵Ǽ£º
SQL> show parameter processes;
NAME                                 TYPE        VALUE
------------------------------------ ----------- ---------------------------------------
aq_tm_processes                      integer     1
db_writer_processes                  integer     1
job_queue_processes                  integer     10
log_archive_max_processes            integer     1
processes                            integer     150
SQL> alter system set processes=400 scope = spfile;
ϵͳÒѸü¸Ä¡£
SQL> show parameter processes;
NAME                                 TYPE        VALUE
------------------------------------ ----------- -----------------------------------------
aq_tm_processes                    &n


Ïà¹ØÎĵµ£º

oracle²éѯÁ·Ï°

empÔ±¹¤±í
(empnoÔ±¹¤ºÅ/enameÔ±¹¤ÐÕÃû/job¹¤×÷/mgrÉϼ¶±àºÅ/hiredateÊܹÍÈÕÆÚ/salн½ð/commÓ¶½ð/deptno²¿ÃűàºÅ)
------1.Ñ¡Ôñ²¿ÃÅ30ÖеÄËùÓÐÔ±¹¤.
select ename
from emp
where deptno = 30;
------2.ÁгöËùÓаìÊÂÔ±(CLERK)µÄÐÕÃû£¬±àºÅºÍ²¿ÃűàºÅ.
select ename,empno,deptno
from emp
where job='CLERK';
--- ......

Oracle Data Gurad ÀíÂÛ֪ʶ


RAC£¬ Data Gurad£¬ Stream ÊÇOracle ¸ß¿ÉÓÃÐÔÌåϵÖеÄÈýÖÖ¹¤¾ß£¬Ã¿¸ö¹¤¾ß¼´¿ÉÒÔ¶ÀÁ¢Ó¦Óã¬Ò²¿ÉÒÔÏ໥ÅäºÏ¡£ ËûÃǸ÷×ԵIJàÖØµã²»Í¬£¬ÊÊÓó¡¾°Ò²²»Í¬¡£
RAC ËüµÄÇ¿ÏîÔÚÓÚ½â¾öµ¥µã¹ÊÕϺ͸ºÔؾùºâ£¬Òò´ËRAC ·½°¸³£ÓÃÓÚ7*24 µÄºËÐÄϵͳ£¬µ«RAC ·½°¸ÖеÄÊý¾ÝÖ»ÓÐÒ»·Ý£¬¾¡¹ ......

oracleÁ·Ï°Ì⣨mldnÊÓÆµ£©Ò»

1,Áгö×îµÍн½ð´óÓÚ1500µÄ¸÷ÖÖ¹¤×÷¼°´ÓÊ´˹¤×÷µÄÈ«²¿¹ÍÔ±ÈËÊý¡£
select job,count(empno) from emp
where job in(select job from emp group by job having min(sal)>1500)
group by job;
2£¬Áгöн½ð¸ßÓÚ¹«Ë¾Æ½¾ùн½ðµÄËùÓÐÔ±¹¤ËùÔÚ²¿ÃÅ£¬Éϼ¶Áìµ¼£¬¹«Ë¾µÄ¹¤×ʵȼ¶¡£
select e.ename,d.dname,m.ename,e.sal,sa. ......

oracleÁ·Ï°£¨mldnÊÓÆµ£©¶þ

´´½¨±í
create table person (pid int,name varchar2(20) unique,
age int check(age between 0 and 150),sex varchar(4) default 'ÄÐ',tp int,
address varchar(200),constraint person_pid_pk primary key(pid));
²åÈëÊý¾Ý
insert into person values(0011,'ÁõÈý½ã',25,'ÄÐ',13930123021,'ºÓ±±Ê¡ÇúÑôÏØ');
´´½¨×Ó±í ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ