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SQL> select   sys_guid() from dual ;
SYS_GUID()
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F18031C69D8345DEB305D4B2E796A282
Äã¿ÉÒ԰ѱíµÄÖ÷¼ü×ֶεÄȱʡֵÉèΪsys_guid()
insert into luxian_info (id) values(sys_guid());


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¡¾×ª¡¿ORACLE BLOB BFILE ÎļþµÄ¼Èë¼°¶ÁÈ¡

 Èç¹ûÄã½Ó´¥¹ýmysqlµÄ»°Ò»¶¨¶ÔmysqlµÄtextºÍblob²»»áİÉú£¬ÔÚmysqlÖÐÊÇÖ±½Ó²Ù×÷textºÍblobµÄ¡£µ«ÊÇÔÚoracleÖУ¬Ëü°Ñlob×öΪһÖÖÌØÊâµÄ×ֶΣ¬²»ÄÜÖ±½Ó½øÐвÙ×÷--±ÈÈç²»ÄÜÖ±½Ó²åÈëµ½lob×Ö¶ÎÖУ¬Ò²²»ÄÜÓÃlike²éѯµÈµÈ¡£   
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OracleÊý¾Ý¿â¼àÌýÅäÖÃ

½ü¶Îʱ¼äºÜ¶àÍøÓÑÌá³ö¼àÌýÅäÖÃÏà¹ØÎÊÌ⣬¿Í»§ÖÕ¶Ë(Client)ÎÞ·¨Á¬½Ó·þÎñÆ÷¶Ë(Server)¡£±¾ÎÄÏÖ¶Ô¼àÌýÅäÖÃ×÷Ò»¼òµ¥½éÉÜ£¬²¢Ìá³öһЩ¿Í»§ÖÕ¶ËÎÞ·¨Á¬½Ó·þÎñÆ÷¶ËµÄ½â¾ö˼·£¬Ô¸¶Ô¹ã´óÍøÓÑÓë¶ÁÕßÓÐһЩ°ïÖú¡£
 
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¡¡¡¡¼àÌýÆ÷ÊÇOracle»ùÓÚ·þÎñÆ÷¶ËµÄÒ»ÖÖÍøÂç·þÎñ£¬Ö÷ÒªÓÃÓÚ¼àÌý¿Í»§¶ËÏòÊý¾Ý¿â·þÎñÆ÷¶ËÌá ......

hibernate3 µ÷ÓÃoracle´æ´¢¹ý³ÌµÄ·½·¨

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<hibernate-mapping>
    <class name="vo.SshPost" table="ssh_post" >
     <!-- <cache usage="read-write"/>-->
        <id name="postId" type="java.lang.String">
     ......

an example to insert data into Oracle Clob

 Step1. Insert empty_clob() into the Clob column of Oracle
Step2. Set autocommit to false
Step3. Select Clob as oracle.sql.CLOB from database
Step4. Insert String into Clob
Step5. Commit
Example:
import java.sql.*;
import java.io.*;
import oracle.jdbc.driver.OracleResultSet;
......

oracleµ¥Ðк¯Êý

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    µ¥ÐÐ:·µ»Øµ¥¸ö½á¹û:substr,length
    ¶àÐÐ:·µ»Ø¶à¸ö½á¹û,any,all
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lower:ת»»ÎªÐ¡Ð´
Select ENAME,LOWER(ENAME) from EMP
upper:ת»»Îª´óд
Select upper( ......
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