INSERT test(id, name) values (1, 'hello') ON DUPLICATE KEY UPDATE name='baby';
原始数据:
运行后数据:
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。
如果行作为新记录被插...
分类:
数据库 时间:
2015-06-01 22:38:08
阅读次数:
208
Given an array of integers and an integer k, find out whether there there are two distinct indices
i and j in the array such that nums[i] = nums[j] and the difference between
i and j is at most k.
...
分类:
其他好文 时间:
2015-06-01 11:40:05
阅读次数:
148
Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in the array, and it should return false if every element is...
分类:
其他好文 时间:
2015-06-01 09:39:41
阅读次数:
96
Contains Duplicate II问题:Given an array of integers and an integerk, find out whether there there are two distinct indicesiandjin the array such thatnu...
分类:
其他好文 时间:
2015-05-31 23:06:11
阅读次数:
159
Given an array of integers and an integerk, find out whether there there are two distinct indicesiandjin the array such thatnums[i] = nums[j]and the d...
分类:
其他好文 时间:
2015-05-31 15:20:01
阅读次数:
88
Given an array of integers and an integer k, find out whether there there are two distinct indices i and j in the array such that nums[i] = nums[j] and the difference between iand j is at most k.思路分析:...
分类:
其他好文 时间:
2015-05-31 12:26:41
阅读次数:
87
Contain Duplicate II:Given an array of integers and an integerk, find out whether there there are two distinct indicesiandjin the array such thatnums[...
分类:
其他好文 时间:
2015-05-31 12:13:16
阅读次数:
106
Contains Duplicate II
Given an array of integers and an integer k, return true if and only if there are two distinct indices
i and j in the array such that nums[i] = nums[j] and the difference b...
分类:
其他好文 时间:
2015-05-30 19:53:03
阅读次数:
140
1. 项目中有相同名字的文件(可能自己写了2个一样的也可能和其他库名字一样)
看项目中有没有相同的名字的文件.这个问题会出现在初学者或者写项目太多的人身上,初学者有时候手忙脚乱的,就把文件名起重复了,而写代码太多了,都有自己封装好的代码,都是直接拿来用,可能就和当前项目的文件名重复了.而对于我们写外包项目的来说,这种情况更容易发生了.一些特定的模块比如登录,分享什么的都是封装的模块.放进...
分类:
移动开发 时间:
2015-05-30 16:47:47
阅读次数:
145
Contains Duplicate IIGiven an array of integers and an integer k, return true if and only if there are two distinct indices i and j in the array such ...
分类:
编程语言 时间:
2015-05-30 16:27:22
阅读次数:
348