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Sql笔记
1. order by 1 并不是不排序,而是根据第一列排序.2. Sqlserver 2008 R2可以生成数据库架构和数据。http://xcc313.iteye.com/blog/1331468这是 工具的强大功能。而非数据库服务器,可以用 sqlserver 2008R2 做客户端连接 Sq...
分类:数据库   时间:2015-03-05 22:11:40    阅读次数:146
数据结构练习 00-自测5. Shuffling Machine (20)
Shuffling is a procedure used to randomize a deck of playing cards. Because standard shuffling techniques are seen as weak, and in order to avoid "ins...
分类:系统相关   时间:2015-03-05 16:15:41    阅读次数:182
1042. Shuffling Machine
Shuffling is a procedure used to randomize a deck of playing cards. Because standard shuffling techniques are seen as weak, and in order to avoid "inside jobs" where employees collaborate with gambler...
分类:系统相关   时间:2015-03-05 14:55:12    阅读次数:197
mysql 多行合并一列
mysql 多行合并一列 使用的函数为:GROUP_CONCAT(exp)其中exp 的参数类似如下:(field order by field desc separator ';');具体的例子如下:创建表:CREATE TABLE `login` ( `Id` int(11) NOT NUL.....
分类:数据库   时间:2015-03-05 14:30:41    阅读次数:202
几种排序算法小结
插入排序, O(n^2), 从头到尾, 将较小的放在前面/* insertion sort ascending order */ #include int main(){ int n, array[1000], c, d, t; printf("Enter number of element...
分类:编程语言   时间:2015-03-05 12:36:44    阅读次数:232
JumpNode递归和非递归访问
JumpNode的定义结构为如下所示:struct JumpNode { int data; //存储数据 int order; // 记录访问次序,初始化均为0 JumpNode *jump, *next; // next为线性下一节点,jump为跳跃到下一节点 JumpNode(int d): data(d), order(-1), jump(NULL), nex...
分类:其他好文   时间:2015-03-05 00:25:09    阅读次数:156
[LeetCode] Spiral Matrix
Given a matrix ofmxnelements (mrows,ncolumns), return all elements of the matrix in spiral order.For example,Given the following matrix:[ [ 1, 2, 3 ],...
分类:其他好文   时间:2015-03-04 20:41:11    阅读次数:161
leetcode_num20_Valid Parentheses
Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. The brackets must close in the correct order, "()" and "()[]{}" are all va...
分类:其他好文   时间:2015-03-04 19:14:54    阅读次数:121
A1051. Pop Sequence (25)
Given a stack which can keep M numbers at most. Push N numbers in the order of 1, 2, 3, ..., N and pop randomly. You are supposed to tell if a given s...
分类:其他好文   时间:2015-03-04 16:34:28    阅读次数:129
数据库系列之T-SQL(系统内置函数)
ROW_NUMBER() 语法:ROW_NUMBER() OVER(PARTITION BY COLUMN ORDER BY COLUMN) 简单的说row_number()从1开始,为每一条分组记录返回一个数字,这里的ROW_NUMBER() OVER (ORDER BY xlh DESC) 是先...
分类:数据库   时间:2015-03-04 14:36:45    阅读次数:176
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