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sqlserver 锁定一行数据,禁止读取,修改和删除
sql 事务中 有时候需要锁定某行,等事物完成后 释放此行。 使用 with(ROWLOCK,UpdLock)   锁定当前行。禁止读取,修改和删除 a 事务 ALTER PROCEDURE [dbo].[asuo] AS BEGIN  begin tran SELECT TOP 1 * FROM dbo.JYQ_HLT_Order with(ROWLOC...
分类:数据库   时间:2015-05-06 13:25:30    阅读次数:195
Binary Tree Level Order Traversal 、Binary Tree Level Order Traversal II
题目描述: 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,...
分类:其他好文   时间:2015-05-06 13:23:22    阅读次数:121
LeetCode Convert Sorted List to Binary Search Tree
Given a singly linked list where elements are sorted in ascending order, convert it to a height balanced BST. 题意:给一个有序的链表建立二叉搜索树。 思路:这里是先递归建立左子树,然后链表跟着移动,左子树建立完了,此时节点就到了根了,接着建立右子树。 /** * Definit...
分类:其他好文   时间:2015-05-06 13:19:54    阅读次数:85
poj2531 Network Saboteur
Description A university network is composed of N computers. System administrators gathered information on the traffic between nodes, and carefully divided the network into two subnetworks in order...
分类:Web程序   时间:2015-05-06 13:12:59    阅读次数:108
【leetcode】Binary Tree Level Order Traversal II
Given a binary tree, return the bottom-up level order traversal of its nodes' values. (ie, from left to right, level by level from leaf to root).For e...
分类:其他好文   时间:2015-05-06 10:39:11    阅读次数:127
Hive通用型自定义聚合函数(UDAF)
在使用hive进行数据处理时,经常会用到group by语法,但对分组的操作,hive没有mysql支持得好: group_concat([DISTINCT] 要连接的字段 [Order BY ASC/DESC 排序字段] [Separator '分隔符']) hive只有一个collect_set内置函数,返回去重后的元素数组,但我们可以通过编写UDAF,来实现这些功能。...
分类:其他好文   时间:2015-05-05 22:06:53    阅读次数:524
Binary Tree Level Order Traversal -- leetcode
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:2015-05-05 22:00:45    阅读次数:178
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. 题意:将一个有序数组变成二叉搜索树。 思路:简单的递归。 /** * Definition for a binary tree node. * public class TreeNode {...
分类:其他好文   时间:2015-05-05 21:59:06    阅读次数:117
LeetCode 2 Add Two Numbers
Problem: You are given two linked lists representing two non-negative numbers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two numbers and retur...
分类:其他好文   时间:2015-05-05 19:36:52    阅读次数:139
PHP生成唯一订单号
利用PHP生成唯一订单号,可用作于商城下单,以及和支付宝等第三方支付进行对接先来一段测试代码:$i = 10;while($i) { $no = build_order_no(); $uniqid = uniqid(); var_dump("$non$uniqidn"); ...
分类:Web程序   时间:2015-05-05 18:33:45    阅读次数:171
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