Oracle查詢歷史操作記錄
1.以sysdba身份進入
2.show parameter audit
3.alter system set audit_sys_operations = true scope = spfile
4.alter system set audit_trail = db,extended scope = spfile
5.startup force
6.show parameter audit
7.audit select table,insert table,delete table,execute procedure by access
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1. ASCII
返回与指定的字符对应的十进制数;
SQL> select ascii(A) A,ascii(a) a,ascii(0) zero,ascii( ) space from dual;
A A ZERO SPACE
--------- --------- --------- ---------
65 97 48 32
2. CHR
给出整数,返回对应的字符;
SQL> select chr(54740) zhao,chr(65) chr65 from dual;
ZH C
-- ......
http://www.diybl.com/course/3_program/java/javajs/2008429/111906.html
如果要使用池的话,就必须使用OracleConnectionCacheImpl,共有三种池的策略:
DYNAMIC_SCHEME(是动态增加.用完如果超过上限则关掉)
The cache will create connections above the specified maximum limit
when necessary but ......
oracle的nvl函数的用法 通过查询获得某个字段的合计值，如果这个值位null将给出一个预设的默认值
select nvl(sum(t.dwxhl),1) from tb_jhde t where zydm=-1这里关心的nvl的用法，nvl（arg,value）代表如果前面的arg的值为null那么返回的值为后面的value
如: NVL(a,b)就是判断a是否是NULL,如果不是返回a的值，如� ......
1、创建表空间
CREATE TABLESPACE mytablespace DATAFILE
'F:\oracle\product\10.2.0\oradata\myoracle\MYTABLESPACE01.DBF' SIZE 500M AUTOEXTEND ON NEXT
100M MAXSIZE UNLIMITED
LOGGING
PERMANENT
EXTENT MANAGEMENT LOCAL AUTOALLOCAT ......
Name:JDBC-DEV1
JNDI Name:jdbc.datasource.DS1
AdminServer
Row Prefetch Size: 48
Stream Chunk Size:256
URL:jdbc:oracle:thin:@192.168.0.118:1521:AAT
Driver Class Name:oracle.jdbc.OracleDriver
连接oracle及postgresql的连接字符串
package com.lwf.eus.util;
import java.sql.Conn ......
