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

BLOBת»»ÎªCLOBµÄº¯Êý£¨oracleÖÐÖ´ÐУ©

BLOBת»»ÎªCLOBµÄº¯Êý£¨oracleÖÐÖ´ÐУ©
CREATE OR REPLACE FUNCTION BlobToClob(blob_in IN BLOB) RETURN CLOB AS
  v_clob    CLOB;
  v_varchar VARCHAR2(32767);
  v_start  PLS_INTEGER := 1;
  v_buffer  PLS_INTEGER := 32767;
BEGIN
  DBMS_LOB.CREATETEMPORARY(v_clob, TRUE);
 
  FOR i IN 1 .. CEIL(DBMS_LOB.GETLENGTH(blob_in) / v_buffer) LOOP
 
    v_varchar := UTL_RAW.CAST_TO_VARCHAR2(DBMS_LOB.SUBSTR(blob_in,
                                                          v_buffer,
                                                          v_start));
 
    DBMS_LOB.WRITEAPPEND(v_clob, LENGTH(v_varchar), v_varchar);
    DBMS_OUTPUT.PUT_LINE(v_varchar);
    v_start := v_start + v_buffer;
  END LOOP;
 
  RETURN v_clob;
 
END BlobToClob;
 
 Ò»¡¢        BLOBºÍCLOBµÄÇø±ð
1.        BLOBʹÓöþ½øÖƱ£´æÊý¾Ý£¬CLOBʹÓÃCHARÀ´±£´æÊý¾Ý¡£
2.        CLOB£¬NCLOB£¬BLOB¶¼ÊÇÄÚ²¿µÄLOB(Large Object)ÀàÐÍ£¬×4G£¬Òª±£´æÍ¼Æ¬¡¢Îı¾Îļþ¡¢WordÎļþ×îºÃʹÓÃBLOBÀàÐÍ¡£
¶þ¡¢        ³£ÓòÙ×÷£º
Get£¨£©·½·¨£º
CLOB£º
//»ñµÃÊý¾Ý¿âÁ¬½Ó   
    Connection con = ConnectionFactory.getConnection(); &n


Ïà¹ØÎĵµ£º

ORACLE ÖÐROWNUMÓ÷¨×ܽá

  ¶ÔÓÚ Oracle µÄ rownum ÎÊÌ⣬ºÜ¶à×ÊÁ϶¼Ëµ²»Ö§³Ö>,>=,=,between...and£¬Ö»ÄÜÓÃÒÔÉÏ·ûºÅ(<¡¢<=¡¢!=)£¬²¢·Ç˵ÓÃ>,>=,=,between..and ʱ»áÌáʾSQLÓï·¨´íÎ󣬶øÊǾ­³£ÊDz鲻³öÒ»Ìõ¼Ç¼À´£¬»¹»á³öÏÖËÆºõÊÇĪÃûÆäÃîµÄ½á¹ûÀ´£¬ÆäʵÄúÖ»ÒªÀí½âºÃÁËÕâ¸ö rownum αÁеÄÒâÒå¾Í²»Ó¦¸Ã¸Ðµ½¾ªÆæ£¬Í¬ÑùÊÇαÁУ¬r ......

oracleǶÌ×

Ò»¡¢Ç¶Ì×±íµÄ¶¨Ò壺
    ǶÌ×±íÊDZíÖÐÖ®±í¡£Ò»¸öǶÌ×±íÊÇijЩÐеļ¯ºÏ£¬ËüÔÚÖ÷±íÖбíʾΪÆäÖеÄÒ»ÁС£¶ÔÖ÷±íÖеÄÿһÌõ¼Ç¼£¬Ç¶Ì×±í¿ÉÒÔ°üº¬¶à¸öÐС£ÔÚijÖÖÒâÒåÉÏ£¬ËüÊÇÔÚÒ»¸ö±íÖд洢һ¶Ô¶à¹ØÏµµÄÒ»ÖÖ·½·¨¡£¿¼²éÒ»¸ö°üº¬²¿ÃÅÐÅÏ¢µÄ±í£¬ÔÚÈκÎʱ¼äÄÚÿ¸ö²¿ÃÅ»áÓкܶàÏîÄ¿ÕýÔÚʵʩ¡£ÔÚÒ»¸öÑϸñµÄ¹ØÏµÄ£ÐÍÖУ ......

Ò»´ÎÏÖ³¡oracle 9i ÐÔÄܵ÷ÓÅ

µÚÒ»²½
   ¶ÔÊý¾Ý¿âÕûÌå×öÁËÒ»¸öÁ˽â
$ORACLE_HOME/bin/sqlplus "sys/sys061201 as sysdba" << EOF
spool peiyz_healthcheck_info.txt
set linesize 200
set pagesize 1000
set time on
set timing on
col owner for a10
col segment_name for a30
col index_name for a30
col table_name for a ......

SQL SERVER 2000ÖзÃÎÊOracleÊý¾Ý¿â·þÎñÆ÷µÄ¼¸ÖÖ·½·¨

ÔÚSQL SERVER 20000ÖзÃÎÊOracleÊý¾Ý¿â·þÎñÆ÷µÄ¼¸ÖÖ·½·¨
1.ͨ¹ýÐм¯º¯Êýopendatasource
ÒªÇó:±¾µØ°²×°Oracle¿Í»§¶Ë
select * from opendatasource('MSDAORA', 'Data Source=XST4;User ID=manager;Password=sjpsjsjs')..MISD.PBCATCOL
ÆäÖУ¬MSDAORAÊÇOLEDB FOR OracleµÄÇý¶¯£¬
×¢Òâ:Óû§ÃûºÍ±íÃûÒ»¶¨Òª´óС£¬·þÎñÆ÷ºÍ ......

SQLServerºÍOracleµÄ³£Óú¯Êý¶Ô±È

1.¾ø¶ÔÖµ
S:select abs(-1) value
O:select abs(-1) value from dual
2.È¡Õû(´ó)
S:select ceiling(-1.001) value
O:select ceil(-1.001) value from dual
3.È¡Õû£¨Ð¡£©
S:select floor(-1.001) value
O:select floor(-1.001) value from dual
4.È¡Õû£¨½ØÈ¡£©
S:select cast(-1.002 as int) value
O:selec ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ