As an emergency rescue team leader of a city, you are given a special map of your country. The map shows several scattered cities connected by some ro ...
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其他好文 时间:
2018-09-07 01:04:47
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241
一、第一印象 1、很烦 二、基础 1、oracle不区分大小写 2、基本数据类型 三、工具plsql 1、使用基础 在左上角原则新建或打开图表,选择sql window; 然后在窗口中 输入sql语句; 选中需要执行的sql语句,点击左上角的一个齿轮按键,就会执行选中的语句。 2、保存何撤销操作如下 ...
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数据库 时间:
2018-09-05 23:51:29
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228
1、创建索引 在select、where、order by常涉及到的字段上建立索引 2、选择合适的存储引擎 1、读操作多:MyISAM 2、写操作多:InnoDB 3、SQL语句的优化(避免全表扫描) 1、where字句尽量不适用 != ,否则放弃索引全表扫描 2、尽量避免null判断,否则放弃索引 ...
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数据库 时间:
2018-09-04 23:33:07
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205
BurpSuite--Scanner功能 0x00 配置 Scanner有四个选项 Result -- 展示扫描结果 Scan queue -- 显示扫描的队列 Live scanning -- 我们也可以对请求的域、路径、IP地址、端口、文件类型进行控制 Options -- 针对这主动/被动两种 ...
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其他好文 时间:
2018-09-04 00:15:23
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1765
A table tennis club has N tables available to the public. The tables are numbered from 1 to N. For any pair of players, if there are some tables open ...
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其他好文 时间:
2018-09-02 20:13:09
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175
As an emergency rescue team leader of a city, you are given a special map of your country. The map shows several scattered cities connected by some ro ...
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编程语言 时间:
2018-09-02 11:55:37
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265
Amazon Web Services (AWS) allows customers to assign metadata to their AWS resources in the form of tags. Each tag is a simple label consisting of a c... ...
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其他好文 时间:
2018-08-31 00:27:06
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186
For a web developer, it is very important to know how to design a web page's size. So, given a specific rectangular web page’s area, your job by now i ...
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其他好文 时间:
2018-08-29 01:02:37
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119
Container With Most Water https://www.youtube.com/watch?v=IONgE6QZgGI Given n non-negative integers a1, a2, ..., an , where each represents a point at... ...
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其他好文 时间:
2018-08-28 22:03:35
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169
For a connected undirected weighted graph G, MST (minimum spanning tree) is a subgraph of G that contains all of G's vertices, is a tree, and sum of i ...
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其他好文 时间:
2018-08-27 23:18:15
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265