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 --sqlplus
sqlplus;
sys /password as sysdba;
--²éÕÒÓû§ID£¨user#£©,Êý¾Ý¿âÀïÃæ´æ·ÅµÄÓû§¶¼ÊÇ´óд!
select user#,name,password from user$ where name ='FACT';
USER# NAME                           PASSWORD
   91     FACT                           7A0F2B316C212D67
-¸ù¾ÝÓû§ID ¸üÐÂÓû§Ãû¡£
update user$ set name= FACT where user#=91;
--Ìá½»¡£
commit;
--È·ÈÏÓû§ÃûÊÇ·ñ¸üгɹ¦¡£
select user#,name,password from user$ where USER# = 91;
USER# NAME                           PASSWORD
91       FACT                            7A0F2B316C212D673
--ÐÞ¸ÄÓû§ÃÜÂë¡£
alter user fact identified by fact;
--ÊÖ¹¤Ö´Ðмì²éµã²Ù×÷£¬½«Database Buffer CacheÖеÄÊý¾ÝÇ¿ÖÆÐ´³öµ½Íâ´æ¡£
alter system checkpoint;
--Ç¿ÖÆË¢ÐÂShared Pool£¡ÒòΪOracleµÄÊý¾Ý×ÖµäÐÅÏ¢ÊÇ»º´æÔÚShared PoolµÄDictionary CacheÖеġ£
alter system flush shared_pool;
--È·ÈÏÃÜÂëÊÇ·ñÐ޸ijɹ¦¡£
select user#,name,password from user$ where USER# = 91;
USER# NAME                           PASSWORD
   91    FACT                             7A0F2B316C212D67
--²âÊÔÓû§ÊÇ·ñ¿ÉÓá£
conn fact/fact
Connected.
show user
USER is "FACT"
--ÖØÆôORACLE·þÎñ


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ORACLE 10 (¸¶Ê×ê¿)ѧϰ±Ê¼Ç µÚ2½Ú ÃüÁî¡£

ORACLE 10 ѧϰ±Ê¼Ç-µÚ2½Ú-ÃüÁî¡£
1. inner join / left join/ right join / full join
select a.dname, b.ename from dept a, emp b where a.deptno=b.deptno and a.deptno=10;
select a.dname, b.ename from dept a inner join emp b
on a.deptno=b.deptno and a.deptno=10;
select dname,ename from dept natural ......

oracle ֮ϵͳ±í µãµÎ »ýÀÛ

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SELECT osuser, username, sql_text from v$session a, v$sqltext b where a.sql_address =b.address order by address, piece;
²¶×½ÔËÐкܾõÄSQL
 select username,sid,opname, round(sofar*100 / totalwork,0) || '%' as progress, time_remaining,sql_text from v$session_longops , v$ ......

Oracle£º1 not in (null)¼ìË÷²»³ö½á¹û

in/not   inÔÚÅжÏNULLʱÓõÄÓë=/<>Ò»ÑùµÄ·½Ê½£¬¼´±ØÐëÓÃis   nullÀ´Åжϣ¬·ñÔòʼÖÕΪʧ°Ü¡£  
  Óï¾ä  
  select   'true'   from   dual   where   (1,2)   not   in   ((2,3),(2,null));  
  ³É¹¦µÄÔ­ÒòÔÚÓÚÅж϶þÔªÖµÊ±Ê ......

±±´óÇàÄñoracleѧϰ±Ê¼Ç17

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1.ÉùÃ÷£º
a.¸ñʽ£ºVariable_name [constant] databyte [not null] [:=default expression]
b.±äÁ¿Óë³£Á¿ÉùÃ÷»ù±¾Ò»Ö£¬Ê¹ÓÃconstantÉùÃ÷µÄΪ³£Á¿£¬²»Ê¹ÓÃΪ±äÁ¿£¬²¢ÇÒ¸³ÖµÖ»ÄÜÔÚDECLAREÇøÓò¸³Öµ£»
c.ʹÓÃ%TYPEºÍ%ROWTYPEÉùÃ÷¿ÉÒÔʹ±äÁ¿µÄÀàÐÍÓë±íÖÐ×Ö¶ÎÀàÐÍ»òÕû¸ö¼Ç¼ÀàÐͱ ......

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oracleΪ³£¼û´íÎóÔ¤¶¨Òå
ÔÚDBMS_STANDARD³ÌÐò°üÖÐÌṩÁËÕâЩ¶¨Òå
²»ÐèÒªÏÔʾÉùÃ÷
declare
  sex student.stu_sex%type;
begin
  select stu_sex into sex from student;
  dbms_output.put_line('sex:'||sex);
exception
&nbs ......
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