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LeetCode Delete Duplicate Emails
Write a SQL query to delete all duplicate email entries in a table named Person, keeping only unique emails based on its smallest Id. +----+------------------+ | Id | Email | +----+-----...
分类:其他好文   时间:2015-04-12 13:28:43    阅读次数:132
Leetcode 82 Remove Duplicates from Sorted List 2
* Problem: * Given a sorted linked list, delete all nodes that have duplicate numbers * leaving only distinct numbers from the original list. * Solut....
分类:其他好文   时间:2015-04-11 13:02:53    阅读次数:112
duplicate symbol _gestureMinimumTranslation in:
在真机上编译无误,在模拟器上编译报错:duplicate symbol _gestureMinimumTranslation in:/Users/Sam/Library/Developer/Xcode/DerivedData/Virtual_Human_Avatar-fwgdkxpnkzapxrdz...
分类:其他好文   时间:2015-04-10 16:55:09    阅读次数:137
LeetCode Remove Duplicates from Sorted List II
Given a sorted linked list, delete all nodes that have duplicate numbers, leaving only distinct numbers from the original list. For example, Given 1->2->3->3->4->4->5, return 1->2->5. Given 1->1-...
分类:其他好文   时间:2015-04-10 15:31:53    阅读次数:114
使用phpmyadmin导入SQL数据报错:#1062 - Duplicate entry '...
使用phpmyadmin导入SQL数据报错: MySQL 返回: #1062 - Duplicate entry '0' for key 'PRIMARY' 出现此错误的原因是数据的主键重复了,错误信息中显示的这条记录已经被导入了~~ 因为可能由于数据的更新会手工在其中对应的位置插入单条或多条...
分类:数据库   时间:2015-04-10 15:06:48    阅读次数:193
leetcode || 78、Subsets
problem: Given a set of distinct integers, S, return all possible subsets. Note: Elements in a subset must be in non-descending order.The solution set must not contain duplicate sub...
分类:其他好文   时间:2015-04-10 11:35:42    阅读次数:181
LeetCode Subsets
Given a set of distinct integers, S, return all possible subsets. Note: Elements in a subset must be in non-descending order.The solution set must not contain duplicate subsets. For exa...
分类:其他好文   时间:2015-04-07 21:38:13    阅读次数:138
运行nutch提示:0 records selected for fetching, exiting
运行Nutch的时候提示Generator: 0 records selected for fetching, exiting ...然后程序退出,怎么回事呢? ? 原因多种多样,归根结底就是CrawlDB中的URL经过爬虫抓取调度器(默认是org.apache.nutch.crawl.Defa...
分类:其他好文   时间:2015-04-07 12:20:25    阅读次数:266
转:Merge into的使用详解
Merge是一个非常有用的功能,类似于Mysql里的insert into on duplicate key.Oracle在9i引入了merge命令,通过这个merge你能够在一个SQL语句中对一个表同时执行inserts和updates操作. 当然是update还是insert是依据于你的指定的条...
分类:其他好文   时间:2015-04-07 11:49:12    阅读次数:184
Leetcode---Subsets
Given a set of distinct integers,  S , return all possible subsets. Note:  Elements in a subset must be in non-descending order.The solution set must not contain duplicate subsets. For exam...
分类:其他好文   时间:2015-04-07 10:05:03    阅读次数:127
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