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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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Oracle±í¿Õ¼ä¹ÜÀí

extent--×îС¿Õ¼ä·ÖÅ䵥λ --tablespace management
block --×îСi/oµ¥Î»      --segment    management
create tablespace james
datafile '/export/home/oracle/oradata/james.dbf'
size 100M ¡¡¡¡¡¡¡¡¡¡¡¡--³õʼµÄÎļþ´óС¡¡
autoextend On¡¡¡¡¡¡¡¡ --×Ô¶¯Ôö³¤
next 10M¡ ......

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     ......

OracleͬÒå´Ê£¬¸øÄã´øÀ´µÄ¼¸¸ö¾ªÏ²

OracleÊý¾Ý¿âÖÐÌṩÁËͬÒå´Ê¹ÜÀíµÄ¹¦ÄÜ¡£Í¬Òå´ÊÊÇÊý¾Ý¿â·½°¸¶ÔÏóµÄÒ»¸ö±ðÃû£¬¾­³£ÓÃÓÚ¼ò»¯¶ÔÏó·ÃÎʺÍÌá¸ß¶ÔÏó·ÃÎʵݲȫÐÔ¡£ÔÚʹÓÃͬÒå´Êʱ£¬OracleÊý¾Ý¿â½«Ëü·­Òë³É¶ÔÓ¦·½°¸¶ÔÏóµÄÃû×Ö¡£ÓëÊÓͼÀàËÆ£¬Í¬Òå´Ê²¢²»Õ¼ÓÃʵ¼Ê´æ´¢¿Õ¼ä£¬Ö»ÓÐÔÚÊý¾Ý×ÖµäÖб£´æÁËͬÒå´ÊµÄ¶¨Òå¡£ÔÚOracleÊý¾Ý¿âÖеĴ󲿷ÖÊý¾Ý¿â¶ÔÏó£¬Èç±í¡¢ÊÓͼ¡¢Í ......

Oracle·ÖÎöº¯Êý£¨Í¬±È£¬»·±È£¬Àۼƣ¬»ù±È£©

CREATE TABLE salaryByMonth
(
 employeeNo varchar2(20),
 yearMonth varchar2(6),
 salary number
) ;
insert into SALARYBYMONTH (EMPLOYEENO, YEARMONTH, SALARY)
values (1, '200805', 500);
insert into SALARYBYMONTH (EMPLOYEENO, YEARMONTH, SALARY)
values (1, '200802', 150);
in ......

oracle olapº¯Êý

/*sum()over()*/
--ĬÈϼÆËãËùÓÐÐеĺϼÆ
select t.empno,t.ename,t.sal,t.deptno,sum(t.sal)over()
from scott.emp t;
--partition by·Ö×éºÏ¼Æ
select t.empno,t.ename,t.sal,t.deptno,
       sum(t.sal)over(partition by t.deptno)
from scott.emp t
order by t.deptno,t.sal; ......
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