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oracle中一些命令
查询oracle中是否存在一个表,例如A表select object_name from all_objects where owner = '数据库用户名' and object_type LIKE 'TABLE%' and object_name = 'A'如果存在将会输出A表名称,...
分类:数据库   时间:2015-07-22 18:09:28    阅读次数:169
HDU 5274 Dylans loves tree(LCA+dfs时间戳+成段更新 OR 树链剖分+单点更新)
Problem Description Dylans is given a tree with N nodes. All nodes have a value A[i].Nodes on tree is numbered by 1~N. Then he is given Q questions like that: ①0 x y:change node x′...
分类:其他好文   时间:2015-07-22 13:19:22    阅读次数:173
性能调优的方法及概念
SHOW STATUS;FLUSH STATUS;查看当前连接数 SHOW STATUS LIKE 'Thread_%';Thread_cached:被缓存的线程的个数Thread_running:处于激活状态的线程的个数Thread_connected:当前连接的线程的个数Thread_creat...
分类:其他好文   时间:2015-07-22 12:24:37    阅读次数:113
anything vs everything
everything多用于肯定而anything多用于否定和疑问语气 anything 1) 任何事情/东西,可以用在肯定句/否定句/疑问句中.如:You can take anything you like.Do you have anything to say?There is not anyt...
分类:其他好文   时间:2015-07-22 09:11:17    阅读次数:98
性能调优的方法及概念
SHOW STATUS;FLUSH STATUS;查看当前连接数 SHOW STATUS LIKE 'Thread_%';Thread_cached:被缓存的线程的个数Thread_running:处于激活状态的线程的个数Thread_connected:当前连接的线程的个数Thread_creat...
分类:其他好文   时间:2015-07-21 21:53:22    阅读次数:172
[LeetCode][Java] Flatten Binary Tree to Linked List
题目: Given a binary tree, flatten it to a linked list in-place. For example, Given 1 / 2 5 / \ 3 4 6 The flattened tree should look like: ...
分类:编程语言   时间:2015-07-21 14:57:59    阅读次数:131
如何查看mysql数据库的引擎/MySQL数据库引擎详解
一般情况下,mysql会默认提供多种存储引擎,你可以通过下面的查看:看你的mysql现在已提供什么存储引擎:mysql> show engines;看你的mysql当前默认的存储引擎:mysql> show variables like '%storage_engine%';你要看某个表用了什么引擎...
分类:数据库   时间:2015-07-21 14:43:33    阅读次数:4733
PAT(A) 2015-03-14
A. To Buy or Not to Buy (20) 时间限制 100 ms 内存限制 65536 kB 代码长度限制 8000 B 判题程序 Standard 作者 CHEN, Yue Eva would like to make a string of beads ...
分类:其他好文   时间:2015-07-21 12:52:47    阅读次数:105
leetcode | ZigZag Conversion
ZigZag Conversion : The string “PAYPALISHIRING” is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility)P A...
分类:其他好文   时间:2015-07-20 19:41:58    阅读次数:116
candence 笔记总结
1.解决candece 启动后提示找不到licence文件的错误: candece的安装就不说了,按照破解步骤一步一步来就行了,但是装完后发现每次启动都会报错"OrCAD Capture license was not found.would you like to launch captu...
分类:其他好文   时间:2015-07-20 12:52:37    阅读次数:293
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