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[数据库]ROW_NUMBER() OVER函数的基本用法
(1)ROW_NUMBER() OVER(ORDER BY COLUMN) 通常,开发者和管理员在一个查询里,用临时表和列相关的子查询来计算产生行号。现在SQL Server 2005提供了一个函数,代替所有多余的代码来产生行号。 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...
分类:数据库   时间:2014-08-02 13:00:23    阅读次数:332
B - Georgia and Bob
Description Georgia and Bob decide to play a self-invented game. They draw a row of grids on paper, number the grids from left to right by 1, 2, 3, ..., and place N chessmen on different grid...
分类:其他好文   时间:2014-08-02 12:56:13    阅读次数:312
Single Number II
Single Number II Given an array of integers, every element appears three times except for one. Find that single one. Note: Your algorithm should have a linear runtime complexity. Could you implement it without using extra memory?...
分类:其他好文   时间:2014-08-02 12:53:53    阅读次数:289
MSSQL 4表联查,子查询,函数统计,分组条件查询综合应用实例
1 SELECT 2 [UserName] 3 ,[Yhxm] 4 ,[Qx] 5 ,[Phone] 6 ,[Number] = COUNT([UserName]) 7 FROM 8 (SELECT 9 [UserName] = A.[username] 10 ,[Y...
分类:数据库   时间:2014-08-02 12:23:43    阅读次数:308
Ugly Windows
poj3923:http://poj.org/problem?id=3923题意:给出两个整数n、m表示屏幕的长宽。屏幕上有一些窗口,每个窗口都是矩形的,窗口的边框用同一个大写字母来表示,不同的窗口的大写字母必定不同。由于窗口的重叠,有些窗口的有些部分被其他窗口覆盖。但是,肯定有一些窗口在最顶端,不...
分类:Windows程序   时间:2014-08-02 12:22:53    阅读次数:286
[leetcode]Distinct Subsequences
Distinct SubsequencesGiven a stringSand a stringT, count the number of distinct subsequences ofTinS.A subsequence of a string is a new string which is...
分类:其他好文   时间:2014-08-02 04:17:48    阅读次数:177
Combination Sum II leetcode java
题目:Given a collection of candidate numbers (C) and a target number (T), find all unique combinations in C where the candidate numbers sums to T.Each ....
分类:编程语言   时间:2014-08-02 01:48:12    阅读次数:246
[leetcode]Edit distance
Edit DistanceGiven two wordsword1andword2, find the minimum number of steps required to convertword1toword2. (each operation is counted as 1 step.)You...
分类:其他好文   时间:2014-08-02 01:29:22    阅读次数:309
Union和Union All的差别
如果我们有一个表Student,包含下面字段与数据:drop table student;create table student(id int primary key,name nvarchar2(50) not null,score number not null);insert into st...
分类:其他好文   时间:2014-08-01 22:57:42    阅读次数:318
sqlserver2005使用row_number() over分页的实现方法
语法:ROW_NUMBER() OVER(PARTITION BY COLUMN ORDER BY COLUMN) 例子: 复制代码 代码如下:select * from ( select *, ROW_NUMBER() OVER(Order by a.CreateTime DESC ) ...
分类:数据库   时间:2014-08-01 22:47:32    阅读次数:449
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