ORACLE 10gÏÂÔصØÖ·
ORACLE 10gÏÂÔصØÖ·
Oracle Database 10g Release 2 (10.2.0.1.0) Enterprise/Standard Edition for Microsoft Windows (32-bit)
http://download.oracle.com/otn/nt/oracle10g/10201/10201_database_win32.zip
http://download.oracle.com/otn/nt/oracle10g/10201/10201_client_win32.zip
http://download.oracle.com/otn/nt/oracle10g/10201/10201_clusterware_win32.zip
http://download.oracle.com/otn/nt/oracle10g/10201/10201_gateways_win32.zip
Oracle Database 10g Release 2 (10.2.0.1.0) Enterprise/Standard Edition for Microsoft Windows (x64)
http://download.oracle.com/otn/nt/oracle10g/10201/102010_win64_x64_database.zip
http://download.oracle.com/otn/nt/oracle10g/10201/102010_win64_x64_client.zip
http://download.oracle.com/otn/nt/oracle10g/10201/102010_win64_x64_clusterware.zip
Oracle Database 10g Release 2 (10.2.0.1.0) Enterprise/Standard Edition for Linux x86
http://download.oracle.com/otn/linux/oracle10g/10201/10201_database_linux32.zip
http://download.oracle.com/otn/linux/oracle10g/10201/10201_client_linux32.zip
http://download.oracle.com/otn/linux/oracle10g/10201/10201_gateways_linux32.zip
Oracle Database 10g Release 2 (10.2.0.1.0) Enterprise/Standard Edition for Linux x86-64
http://download.oracle.com/otn/linux/oracle10g/10201/10201_database_linux_x86_64.cpio.gz
http://download.oracle.com/otn/linux/oracle10g/10201/10201_client_linux_x86_64.cpio.gz
http://download.oracle.com/otn/linux/oracle10g/10201/10201_clusterware_linux_x86_64.cpio.gz
http://download.oracle.com/otn/linux/oracle10g/10201/10201_gateways_linux_x86_64.cpio.gz
Oracle Database 10g Release 2 (10.2.0.1.0) Enterprise/Standard Edition for AIX5L
http://download.oracle.com/otn/aix/oracle10g/10201/10gr2_aix5l64_database.cpio.gz
http://download.oracle.com/otn/aix/oracle10g/10201/10gr2_aix5l64_client.cpio.gz
http://download.oracle.com/otn/aix/oracle10g/10201/10gr2_aix5l64_cluster.cpio.gz
http://download.oracle.com/otn/aix/oracle10g/10201/10gr2_aix5l64_gateways.cpio.gz
Oracle Database 10g Release 2 (10.2.0.
Ïà¹ØÎĵµ£º
Êý¾Ý¿âÊý¾Ý
ID
UserName
Date
1
User1
2010/4/27
1
User1
2010/4/11
1
User1
2010/4/1
ÒªÇó£º
»ñÈ¡×îÐÂÈÕÆÚµÄÒ»ÌõÊý¾Ý
SqlÓï¾ä£º
select t.* from tb t where date = (select max(date) from tb where id = t.id) order by t.id ......
SELECT
DECODE(ÁÐ,0,'Q'1,'P',2,'O')¡¡AS ret
from dual
--·ÖÎö: µ± ÁÐ=0ʱ,½«"Q"¸³Öµ
--µ± ÁÐ =1ʱ,½«"P"¸³Öµ
--µ± ÁÐ=2ʱ,½«"O"¸³Öµ
--NVL()º¯Êý:
--NVL(ARG,VALUE)´ï±êÈç¹ûÇ°ÃæµÄARGֵΪNULLÄÇô·µ»ØµÄֵΪºóÃæµÄVALUE¶þÕß½áºÏʹÓÃ:
DECODE(NVL(±äÁ¿ ''),'','-','OK')
//·ÖÎö:
--Èô ±äÁ¿ ÊÇ·ñΪ¿Õ.ÈôΪ¿Õ¸³¸ø¿ ......
ÎÄÕÂÒ»£ºSCNÊÇʲô£¿The System Change Number
system change number (SCN)ÊÇÒ»¸ö·Ç³£ÖØÒªµÄ±ê¼Ç£¬OracleʹÓÃËüÀ´±ê¼ÇÊý¾Ý¿âÔÚ¹ýȥʱ¼äÄÚµÄ״̬ºÍ¹ì¼£¡£
OracleʹÓÃSCNÀ´±£´æËùÓб仯µÄ¹ì¼£¡£SCNÊÇÒ»¸öÂ߼ʱÖÓÀ´¼Ç¼Êý¾Ý¿âʼþ¡£Ëü·Ç³£µÄÖØÒª£¬²¢²»ÊÇÖ»ÊÇΪÁ˻ָ´¡£
SCNÓеãÀàËÆÓÚsequence£¬OracleÔÚSGAÖÐÔ ......
/**
*
*/
package com.huawei.widget.util;
import java.math.BigDecimal;
/**
* @author tanjixuan
* @since 2008-12-20
*
*/
public final class DatabaseUtil
{
// oracleתÒå×Ö·û
public static final char ORACLE_ESCAPE_CHAR = '\\';
// orac ......
Update SQLS will lead dead lock exception. Because by default, it use optimistic lock but not pessimistic lock.
Below description is exceprted from the attachment(It exceeds my image that this blog can not upload the attachment,hehe)
Optimistic locking offers an elegant solution to the problems o ......