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weblogicÏÂÔÚOracleÖд洢clobÀàÐÍÒ»Àý

String sql = "select t.FILE_INFO from T_FILE_DB_DETAIL t where t.id= "
      + fileDBUpDownDetail.getId() + " for update";
    rs = stmt.executeQuery(sql);
    if (rs.next()) {
     // ÔÚweblogicϲ¿Êðʱ£¬ÐèÒª¸ü¸ÄΪBea WebLogic BLOB¸ñʽ
//     weblogic.jdbc.vendor.oracle.OracleThinBlob blob = (weblogic.jdbc.vendor.oracle.OracleThinBlob) rs
//       .getBlob(1);
     BLOB blob = (BLOB) rs.getBlob(1);
     if (blob != null) {
      out = blob.getBinaryOutputStream();
      byte[] buf = new byte[8192];// 8K »º´æ
      int len;
      while ((len = fileInputStream.read(buf)) > 0) {
       if (out != null) {
        out.write(buf, 0, len);
        out.flush();
       }
      }
     }
    }


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SQLÖеĵ¥¼Ç¼º¯Êý    
1.ASCII    
·µ»ØÓëÖ¸¶¨µÄ×Ö·û¶ÔÓ¦µÄÊ®½øÖÆÊý;    
SQL> select ascii(’A’) A,ascii(’a’) a,ascii(’0’) zero,ascii(’ ’) space from dual;&nb ......

oracle sqlplus ³£ÓÃÃüÁî´óÈ«

showºÍsetÃüÁîÊÇÁ½ÌõÓÃÓÚά»¤SQL*Plusϵͳ±äÁ¿µÄÃüÁî
SQL> show all --²é¿´ËùÓÐ68¸öϵͳ±äÁ¿Öµ
SQL> show user --ÏÔʾµ±Ç°Á¬½ÓÓû§
SQL> show error¡¡¡¡ --ÏÔʾ´íÎó
SQL> set heading off --½ûÖ¹Êä³öÁбêÌ⣬ĬÈÏֵΪON
SQL> set feedback off --½ûÖ¹ÏÔʾ×îºóÒ»ÐеļÆÊý·´À¡ÐÅÏ¢£¬Ä¬ÈÏֵΪ"¶Ô6¸ö» ......

ORACLE Êý¾Ý±í´´½¨²½Öè

1.´´½¨ÁÙʱ±í¿Õ¼ä
CREATE TEMPORARY TABLESPACE Test_temp
TEMPFILE 'E:\Test\TEST_temp.dbf'
SIZE 32M
AUTOEXTEND ON
NEXT 32M MAXSIZE 2048M
EXTENT MANAGEMENT LOCAL;
2.´´½¨Óû§±í¿Õ¼ä
create tablespace TEST
datafile 'E:\TEST\TEST.dbf'
size  100M
autoextend on maxsize     ......

oracle½â³öËÀËøµÄ°ì·¨

1£ºÒÔÒ»¸öDBAÉí·ÖµÄÓû§µÇ½£¬´ò¿ªÒ»¸öÃüÁî´°¿Ú¡£Ö´ÐÐÃüÁî
SELECT /*+ rule */ s.username,
decode(l.type,'TM','TABLE LOCK',
'TX','ROW LOCK',
NULL) LOCK_LEVEL,
o.owner,o.object_name,o.object_type,
s.sid,s.serial#,s.terminal,s.machine,s.program,s.osuser
from v$session s,v$lock l,dba_objects o
WHERE ......

ORACLEÖÐÈÕÆÚ¼Ó¼õ


¼Ó·¨
select sysdate,add_months(sysdate,12) from dual;         --¼Ó1Äê
select sysdate,add_months(sysdate,1) from dual;         --¼Ó1ÔÂ
select sysdate,to_char(sysdate+7,'yyyy-mm-dd HH24:MI:SS') from dual;   ......
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