S-TreesA Strange Tree (S-tree) over the variable set is a binary tree representing a Boolean function . Each path of the S-tree begins at the root n.....
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其他好文 时间:
2014-08-10 18:11:00
阅读次数:
415
把本地文件上传到hadoop的hdfs-over-ftp...
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其他好文 时间:
2014-08-08 21:22:26
阅读次数:
303
Northwind数据库,选取价格第二高的产品。有两种方法,一个是用Row_Number()函数:SELECT productname FROM (SELECT TOP 2 productname, Row_Number() OVER (ORDER BY unitprice desc) AS...
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数据库 时间:
2014-08-08 21:15:36
阅读次数:
244
oracle 里面经常这样用select col1,col2..., row_number() over (partition by colx order by coly) from table_name;;这句话的意思是把表中的数值按照colx 分组,每一组内部按照coly排序,同时 row_nu...
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数据库 时间:
2014-08-08 20:40:56
阅读次数:
307
看看以前的私密日志,原来自己之前被很多小而简单的问题困惑过!
看着那时候我们还是新手中的新手做的备忘笔记!
其实就是用了Oracle的统计函数而已!
以前的日记(看样子应该是以前公司的源码,呵呵……)如下:勿喷!
对多数据进行分组排序后取每组第一条记录:...
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数据库 时间:
2014-08-08 16:05:06
阅读次数:
274
转自09年的blog,因为facebook在国内无法访问,故此摘录。The Photos application is one of Facebook’s most popular features. Up to date, users have uploaded over 15 billion p...
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其他好文 时间:
2014-08-08 12:26:55
阅读次数:
374
select sn, pname, srnum, rerepairtime, rn from ( select sn,pname, srnum, rerepairtime,row_number() over(partition by assetsid order by rer...
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其他好文 时间:
2014-08-07 18:17:41
阅读次数:
216
Download AnacondaAnaconda is a completely free Python distribution (including for commercial use and redistribution). It includes over 195 of the most...
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编程语言 时间:
2014-08-07 12:54:29
阅读次数:
241
In this article we will discuss how can we load jars residing over NFS in JBoss AS-7 classpath. In some development environment, when there are multip...
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其他好文 时间:
2014-08-07 12:50:10
阅读次数:
323
Channel AllocationTime Limit:1000MSMemory Limit:10000KTotal Submissions:12143Accepted:6218DescriptionWhen a radio station is broadcasting over a very ...
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其他好文 时间:
2014-08-07 12:02:00
阅读次数:
236