(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...
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数据库 时间:
2014-08-02 13:00:23
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332
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...
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其他好文 时间:
2014-08-02 12:56:13
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312
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?...
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其他好文 时间:
2014-08-02 12:53:53
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289
1 SELECT 2 [UserName] 3 ,[Yhxm] 4 ,[Qx] 5 ,[Phone] 6 ,[Number] = COUNT([UserName]) 7 FROM 8 (SELECT 9 [UserName] = A.[username] 10 ,[Y...
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数据库 时间:
2014-08-02 12:23:43
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308
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...
Distinct SubsequencesGiven a stringSand a stringT, count the number of distinct subsequences ofTinS.A subsequence of a string is a new string which is...
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其他好文 时间:
2014-08-02 04:17:48
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177
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 ....
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编程语言 时间:
2014-08-02 01:48:12
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246
Edit DistanceGiven two wordsword1andword2, find the minimum number of steps required to convertword1toword2. (each operation is counted as 1 step.)You...
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其他好文 时间:
2014-08-02 01:29:22
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309
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...
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其他好文 时间:
2014-08-01 22:57:42
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318
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 ) ...
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数据库 时间:
2014-08-01 22:47:32
阅读次数:
449