采用分析函数row_number()select * from( select a.*,row_number() over (partition by column1 order by column2 [desc]) as rn from table1) qwhere rn = 1其中,part.....
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其他好文 时间:
2015-01-30 15:27:50
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128
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 return it as a l...
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其他好文 时间:
2015-01-30 10:55:06
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293
本文是在学习中的总结,欢迎转载但请注明出处:http://blog.csdn.net/pistolove/article/details/43302343
Given an array with n objects colored red, white or blue, sort them so that objects of the same color are adjacent, with the colors in the order red, white and blue....
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其他好文 时间:
2015-01-30 09:04:36
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140
找到httpd服务的phpmyadmin的配置文件,我的在目录/etc/httpd/conf.d下,然后打开后 原来配置: ????? <IfModule !mod_authz_core.c> ????? ? ?# Apache 2.2 ????? ? ?Order Deny,Allow ? ?...
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Web程序 时间:
2015-01-30 06:45:09
阅读次数:
205
Description
In order to get from one of the F (1 <= F <= 5,000) grazing fields (which are numbered 1..F) to another field, Bessie and the rest of the herd are forced to cross near the Tree of Rotte...
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移动开发 时间:
2015-01-29 21:12:44
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311
apache配置: ServerName test.com DocumentRoot /home/q/system/Engine/src/biz/www ProxyRequests Off Order deny,allow Allow from...
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Web程序 时间:
2015-01-29 21:05:00
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181
原题地址基本数据结构操作,二叉树的层次遍历。代码: 1 vector > zigzagLevelOrder(TreeNode *root) { 2 vector > res; 3 vector layer; 4 bool l2r = true; 5 ...
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其他好文 时间:
2015-01-29 20:49:11
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169
declare cursor mycursor is SELECT ROWID FROM tpr_zjjx1 WHERE jxrq=to_date('2013-06-30','yyyy-mm-dd') order by rowid; type rowid_table_type i...
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其他好文 时间:
2015-01-29 19:29:56
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138
视图是虚拟表,主要用于方便使用和安全性,如:按照条件筛选和过滤行保护敏感数据降低复杂程度抽象逻辑数据库在使用视图时需要注意:视图中可以包含多张表视图可以基于视图再次创建视图也允许增删改如果排序ORDER BY,则必须使用TOP关键字不能出现INTO关键字不能出现变量创建视图的语法create vie...
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编程语言 时间:
2015-01-29 19:24:34
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199
oracle 多表查询 1对多 多个数据放到一个字段内
select id,zhzxm,fzhzxm,ltrim(max(sys_connect_by_path(xm, ',')), ',') xm
from (
select id,zhzxm,fzhzxm,xm,row_number() over(partition by id order by lrsj) rn --标记...
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数据库 时间:
2015-01-29 17:41:56
阅读次数:
144