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mysql order by 出现Using filesort的解决办法
http://blog.csdn.net/yangyu112654374/article/details/4251624比如一条sql语句select * from TABLE1 where A1=1 and A2=2 and A3=3 order by A4 ASC;优化后是这样: select ...
分类:数据库   时间:2015-03-16 19:07:27    阅读次数:539
Partition List
Given a linked list and a value x, partition it such that all nodes less than x come before nodes greater than or equal to x. You should preserve the original relative order of the nodes in each of...
分类:其他好文   时间:2015-03-16 17:55:05    阅读次数:105
Binary Tree Zigzag Level Order Traversal
Given a binary tree, return the zigzag level order traversal of its nodes' values. (ie, from left to right, then right to left for the next level and alternate between). For example: Given binary tr...
分类:其他好文   时间:2015-03-16 16:34:14    阅读次数:107
leetcode------Subsets
标题:Subsets通过率:28.2%难度:中等Given a set of distinct integers,S, return all possible subsets.Note:Elements in a subset must be in non-descending order.The ...
分类:其他好文   时间:2015-03-16 16:20:18    阅读次数:82
[LeetCode] Sort Colors 颜色排序
Given an array withnobjects colored red, white or blue, sort them so that objects of the same color are adjacent, with the colors in the order red, wh...
分类:编程语言   时间:2015-03-16 12:23:02    阅读次数:140
Binary Tree Level Order Traversal
Given a binary tree, return the level order traversal of its nodes' values. (ie, from left to right, level by level). For example: Given binary tree {3,9,20,#,#,15,7}, 3 / 9 20 ...
分类:其他好文   时间:2015-03-16 11:03:15    阅读次数:139
magento设置订单状态
loadByIncrementId(100000001); // 100000001为订单编号// 获取订单状态$status = $order->getStatus();$state = $order->getState();echo $status;echo "\r\n";echo $state...
分类:其他好文   时间:2015-03-16 11:00:32    阅读次数:145
Mysql 另类盲注中的一些技巧
很多技巧从国外的paper学到的,不过国内没有多少人使用,所以发出来,笔记下~一、order by 的参数注入技巧:两种方法,思路都一样。example. “select username,password from uc_members order by”.$_GET['oderby']a.常见的...
分类:数据库   时间:2015-03-16 10:56:25    阅读次数:168
[Leetcode]Convert Sorted Array to Binary Search Tree
Given an array where elements are sorted in ascending order, convert it to a height balanced BST.分治是比较好而且容易想到的思路。 1 class Solution { 2 public: 3 T...
分类:其他好文   时间:2015-03-15 23:32:20    阅读次数:212
利用自定义特性实现List的多属性排序
知道linq有order by的功能,但是还是动手研究了一下,算是多实践实践反射。这篇算是笔记,直接上代码:
分类:编程语言   时间:2015-03-15 22:47:23    阅读次数:145
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