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查看某个用户被授予的角色
select * from dba_role_privs where grantee='SCOTT';
查询某个角色具有的权限(一看到这句话就要想到权限有系统权限system privilege与对像 object privilege)
select * from ROLE_SYS_PRIVS where ROLE='CONNECT'
select * from ROLE_TAB_PRIVS where ROLE='CONNECT'
刚装上的oracle 在本机上 sys 与 system 的密码似乎没有， 即不是manager也不是 change_on_install
1.密码这样瞎写都是可以登录的，比较奇怪，system用户也是
conn sys/xxxxx as sysdba --xxxx为任意字符
2.登录后想改密码
password --但怎么改也不成功
3.但是这样写就成功了，这是为啥？
alter user sys identified by xxxx ----xxxx为你指定的密码
THIS IS A RUSH TRANSCRIPT. THIS COPY MAY NOT BE IN ITS FINAL FORM AND MAY
BE UPDATED.
ALLIE, ROWAN COUNTY MIDDLE SCHOOL STUDENT: Hi, I'm Allie.
SARAH, ROWAN COUNTY MIDDLE SCHOOL STUDENT: And I'm Sarah. We're from Rowan
County Middle School in Morehead, Kentucky. We'd like to recognize Ms. Ho ...
THIS IS A RUSH TRANSCRIPT. THIS COPY MAY NOT BE IN ITS FINAL FORM AND MAY BE UPDATED.
JUSTIN
TOLLIVER, WEST LAKE HIGH SCHOOL STUDENT: Greetings. My name is Justin
Tolliver from West Lake High School from West Lake, Georgia. As a member
of the graduating class of 2011, I would like to expr ...
THIS IS A RUSH TRANSCRIPT. THIS COPY MAY NOT BE IN ITS FINAL FORM AND MAY BE UPDATED.
CNN ANNOUNCER: This is CNN Breaking News.
DON
LEMON, CNN ANCHOR, CNN NEWSROOM: We're being told by a White House
official that the president will make a statement at 10:30.
WOLF BLITZER, CNN ANCHOR, THE ...
推荐一个主页，http://advdbg.org/，似乎不一般的强。
有
n
个猴子参加猴王选举，按照
m
进行循环报数。数到
m
的猴子被淘汰，
直到剩余最后一个猴子变为大王。
#include "stdafx.h"
#include <stdio.h>
#include <iostream>
#define KICK 2
int findKing(int monkeyNum, int round)
{
int *arr = (int*) malloc(sizeof(int) * monkeyNum);
int count = 0;
int i = 0;
whil ...
http://blog.csdn.net/lw1a2/archive/2006/09/05/1179068.aspx
8、从union的sizeof问题看cpu的对界
考虑下面问题：（默认对齐方式）
union u { double a; int b; };
union u2 { char a[13]; int b; };
union u3 { char a[13]; char b; };
cout<<sizeof(u)<<endl; // 8 cout<<sizeof(u2)<<endl; ...
Oracle 认证
http://education.oracle.com/pls/web_prod-plq-dad/db_pages.getpage?page_id=198&p_org_id=1243197&lang=ZHS
简单算法如下, 核心思路是值域有限，转化成反函数
bool isUsedByA[256] = {0};
bool isUsedByB[256] = {0};
for each value in a[]
begin
isUsedByA[static_cast<unsigned char>(value)] = true;
end
for each char_elem in b[]
begin
isUsedByB[static_cast<unsigned char>(value)] = true;
end
define buffer c
...
windows下不错的文本抓取工具
WindowsTextCopyer.exe
vi中的正则表达式与sed, grep, awk 通用
正则表示式元字符只包括如下：. * [...] ^ $ \{n,m\} \
下边的属于扩展字符，我测试了一下，在vi中不支持，无语了+ ? | () {n,m}
\(\) 分组符， Saves the pattern enclosed between \( and \) into a special holding space, or a
“hold buffer.” Up to nine patterns can be saved in this way on a single line
如 ...
有这样一段文本
// 实际空间为0x5050~0x509F
#define NSEVT_SM_SEC_CODEBASE NSEVT_SWDL_CODEBASE_END
//0x5050
#define NSEVT_SM_SEC_CODEBASE_END (NSEVT_SM_SEC_CODEBASE +
0x50
)
//0x50A0
// 实际空间为0x50A0~0x50F0
#define NSEVT_ ...
Dot.NET.Patterns.Architecture.Design.And.Process.chm
Csharp WPF sample
http://code.msdn.microsoft.com/wpfsamples
http://www.codeproject.com/KB/WPF/wpf2.aspx
visual effect
http://www.codeproject.com/KB/graphics/locuseffects.aspx