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SQL> create user myhuang identified by myhuang default tablespace myhuang;//ÏÈ´´½¨Ò»¸öÓû§
SQL> grant resource,connect to myhuang;
SQL> grant dba to myhuang;//
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DBA
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SQL> revoke unlimited tablespace from myhuang;//
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SQL> alter user myhuang quota 0 on system;//
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SQL> alter user myhuang quota unlimited on myhuang;//
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C:\Documents and Settings\myhuang>imp system/123456@vdb fromuser=lnxh tous
er=myhuang file=G:\myhuang\lnxh.dmp ignore=y grants=n
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IMP-00003:
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ORACLE
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1658
ORA-01658:
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MYHUANG
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INITIAL
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SQL> drop tablespace myhuang including contents and datafiles;
 
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-00003
: ORACLE error 1950 encountered.
ORA-01950
: no privileges on tablespace 'XXXXXXX'
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Oracle Êý¾Ý¿âµÄ°ó¶¨±äÁ¿ÌØÐÔ¼°Ó¦ÓÃ
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°ó¶¨±äÁ¿(binding variable),¹²Ïí³Ø(shared buffer pool), SGA(system global area);
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Oracle TNSLSNR Full Client

Most of admins neglect setting password on TNSlsnr Clients for Oracle databases. Oracle ensures that you can either connect to TNSlsnr on a localhost or through mapping to a remote Oracle database using .ora files.
This is not the case anymore Based on Jwa perl client.
This client is a FULL clie ......

oracle ²ð·Ö×Ö·û´®

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CREATE   OR   REPLACE   PROCEDURE   sptstr   (srcstr   varchar2)   as  
      stmp   varchar2(2000);  
  begin &n ......

ORACLE ³£ÓÃ×Ö·ûº¯Êý


1.LOWER(str) Ç¿ÖÆСд
2.UPPER(str) Ç¿ÖÆ´óд
3.INITCAP(str) ÿ¸öµ¥´ÊÊ××Öĸ´óд
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SQL> select initcap('my_boy') from dual; --·µ»Ø"My_Boy"
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4.CONCAT(str1,str2£©Á¬½Óº¯Êý,Á¬½Óstr1ºÍstr2×Ö·û´®
5.SUBSTR(string,a[,b])·µ»ØstringµÄÒ»²¿·Ö£¬aºÍbÒÔ×Ö·ûΪµ¥Î»¡£´Ó× ......

Oracle ¼¸¸ö¹Ø¼ü×ÖÀí½â

/*
--DML´¥·¢Æ÷ÀàÐÍ:
·ÖΪÓï¾ä¼¶´¥·¢Æ÷ºÍÐм¶´¥·¢Æ÷.
Óï¾ä¼¶´¥·¢Æ÷²»ÐèÒª¼Ófor each row¹Ø¼ü×Ö,²¢ÇÒ²»ÄÜʹÓÃ:new ºÍ :old¹Ø¼ü×Ö.¶ÔÕû¸ösqlÓï¾äÖ»Ö´ÐÐÒ»´Î´¥·¢Æ÷.
Ðм¶´¥·¢Æ÷ÐèÒª¼Ófor each row¹Ø¼ü×Ö,¿ÉÒÔʹÓÃ:newºÍ:old¹Ø¼ü×Ö,¶ÔÕû¸ösqlÓï¾äÓ°Ïìµ½µÄÿһÐж¼Ö´ÐÐÒ»´Î´¥·¢Æ÷.
--:newºÍ:old¹Ø¼ü×Ö×ܽá
:newÖ¸µÄÊǵ±Ç°D ......
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