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HDU 1102 && POJ 2421 Constructing Roads (经典MST~Prim)
链接:http://poj.org/problem?id=2421  或   http://acm.hdu.edu.cn/showproblem.php?pid=1102 Problem Description There are N villages, which are numbered from 1 to N, and you should build some roads ...
分类:其他好文   时间:2014-05-10 09:34:09    阅读次数:389
在Silverlight中实施RESTful调用
在Silverlight中实施RESTful调用: http://book.51cto.com/art/201006/206314.htm http://bbs.csdn.net/topics/320039569http://www.cyqdata.com/cnblogs/article-detai...
分类:Web程序   时间:2014-05-07 19:23:01    阅读次数:353
各个数据库中top 的表示方法
Select Top在不同数据库中的使用用法:1. Oracle数据库 SELECT * FROM TABLE1 WHERE ROWNUM<=N2. Infomix数据库 SELECT FIRST N * FROM TABLE13. DB2数据库 SELECT * ROW_NUMBER() OVER...
分类:数据库   时间:2014-05-07 19:12:48    阅读次数:366
SQL Server获取指定行的数据
SQL Server获取指定行(如第二行)的数据--SQL Server获取指定行(如第二行)的数据----法一(对象法)--select * from(select * , number = row_number() over(orderby Grade desc) from Students)m...
分类:数据库   时间:2014-05-07 18:41:48    阅读次数:517
MySQL
MySQL中表之间的链接语句:关键词:INNER JOIN格式:SELECT 列名表 FROM 表名1 [INNER] JOIN 表名2 ON或WHERE条件表达式
分类:数据库   时间:2014-05-07 09:08:18    阅读次数:342
POJ-1042 Gone Fishing (贪心法求最佳钓鱼方案
John is going on a fishing trip. He has h hours available (1 <= h <= 16), and there are n lakes in the area (2 <= n <= 25) all reachable along a single, one-way road. John starts at lake 1, but he can finish at any lake he wants. He can only travel from on...
分类:其他好文   时间:2014-05-07 08:48:52    阅读次数:515
sql语句执行顺序
一、逻辑查询处理的各个阶段 (5)SELECT DISTINCT TOP()                        (1)FROM JOIN ON   (2)WHERE (3)GROUP BY (4)HAVING (6)ORDER BY 上边语句是一个普通格式的查询语句,基本包含了所有的查询条件和关键字。你可能会发现前边的序号并不是按顺序来的,被你说对了,这...
分类:数据库   时间:2014-05-07 08:26:11    阅读次数:476
Sql_Server中如何判断表中某列是否存在
/*判断表AA中是否存在AA_ID这一列,如果不存在,则新增*/ IF NOT EXISTS (SELECT 1 FROM syscolumns INNER JOIN sysobjects ON sysobjects.id = syscolumns.id WHERE syscolumns.name = 'AA_ID' AND sysobjects.name = 'AA') ALTER TA...
分类:数据库   时间:2014-05-07 07:33:47    阅读次数:373
数字图像和视频处理的基础-第5周中值滤波PSNR练习题
In this problem you will perform median filtering to enhance the quality of a noise corrupted image. Recall from the video lecture that median filtering is effective for removing "salt-and-pepper" n...
分类:其他好文   时间:2014-05-07 07:20:09    阅读次数:326
POJ3525 Most Distant Point from the Sea(半平面交)
今天打算做两道半平面交,一题卡太久了,心都碎了。。。#pragma warning(disable:4996)#include #include #include #include #include #include #include using namespace std;#define maxn...
分类:其他好文   时间:2014-05-06 12:27:57    阅读次数:389
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