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(转)replace 和 on duplicate key update语句
一.on duplicate key update语句 如果您指定了ON DUPLICATE KEY UPDATE,并且插入行后会导致在一个UNIQUE索引或PRIMARY KEY中出现重复值,则执行旧行UPDATE。例如,如果列a被定义为UNIQUE,并且包含值1,则以下两个语句具有相同的效果:....
分类:其他好文   时间:2015-04-19 14:30:35    阅读次数:160
Remove Duplicates from Sorted List II -- leetcode
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:2015-04-18 13:11:39    阅读次数:121
LeetCode - Duplicate Emails
Description:Write a SQL query to find all duplicate emails in a table named Person. 找出表中重复的Email。# Write your MySQL query statement belowselect Email....
分类:其他好文   时间:2015-04-18 09:59:11    阅读次数:119
[LeetCode]DeleteDuplicateEmails,解题报告
题目SQL query to delete all duplicate email entries in a table named Person, keeping only unique emails based on its smallest Id. Id Email 1 john@example.com 2 bob@example.com 3 john@examp...
分类:其他好文   时间:2015-04-17 11:25:03    阅读次数:100
Duplicate files copied in APK META-INF/LICENSE.txt
build.gradle加入 android? { ????packagingOptions?{ ????????exclude? ‘META-INF/LICENSE.txt‘ ????} }
分类:Web程序   时间:2015-04-16 12:38:23    阅读次数:133
[LeetCode]Duplicate Emails,解题报告
目录目录 题目 解题思路 AC SQL题目Write a SQL query to find all duplicate emails in a table named Person. Id Email 1 a@b.com 2 c@d.com 3 a@b.com For example, your query should return the following fo...
分类:其他好文   时间:2015-04-14 14:38:54    阅读次数:154
leetcode || 82、Remove Duplicates from Sorted List II
problem: 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...
分类:其他好文   时间:2015-04-13 19:03:43    阅读次数:121
Subsets -- leetcode
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:2015-04-13 16:46:47    阅读次数:130
android多dex打包问题
将android-support-multidex.jar放到libs下然后编译,出现如下错误:Error:Execution failed for task ':app:packageAllDebugClassesForMultiDex'. > java.util.zip.ZipException: duplicate entry: android/support/multidex/MultiDex.class...
分类:移动开发   时间:2015-04-13 16:43:04    阅读次数:384
Sicily 13980. Record Keeping
13980. Record Keeping Constraints Time Limit: 1 secs, Memory Limit: 256 MB Description Farmer John has been keeping detailed records of his cows as they enter the barn for milking. E...
分类:其他好文   时间:2015-04-13 12:59:47    阅读次数:132
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