一、表操作语法差异 在建表的时候,只有自增的语法不同。 主键(PRIMARY KEY)、外键(FOREIGN KEY)、非空(NOT NULL)、唯一(UNIQUE)、默认值(DEFAULT)都相同,自增实现的方式不同。 下面给出3种数据库通用的建表与初始化测试语句:CREATE TABLE ...
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数据库 时间:
2014-08-26 21:08:06
阅读次数:
271
Given a string S, find the longest palindromic substring in S. You may assume that the maximum length of S is 1000, and there exists one unique longes...
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其他好文 时间:
2014-08-26 19:09:06
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153
The set [1,2,3,…,n] contains a total of n! unique permutations.By listing and labeling all of the permutations in order,We get the following sequence ...
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其他好文 时间:
2014-08-25 22:49:25
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274
Follow up for "Unique Paths":Now consider if some obstacles are added to the grids. How many unique paths would there be?An obstacle and empty space i...
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其他好文 时间:
2014-08-25 20:55:04
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208
A robot is located at the top-left corner of a m x n grid (marked 'Start' in the diagram below).The robot can only move either down or right at any po...
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其他好文 时间:
2014-08-25 20:43:44
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237
Unique PathsA robot is located at the top-left corner of amxngrid (marked 'Start' in the diagram below).The robot can only move either down or right a...
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编程语言 时间:
2014-08-25 06:33:53
阅读次数:
277
Given an array S of n integers, are there elements a, b, c, and d in S such that a + b + c + d = target? Find all unique quadruplets in the array whic...
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其他好文 时间:
2014-08-24 23:37:03
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278
Given a set of candidate numbers (C) and a target number (T), find all unique combinations in C where the candidate numbers sums to T.The same repeate...
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其他好文 时间:
2014-08-24 23:34:33
阅读次数:
259
Given a collection of candidate numbers (C) and a target number (T), find all unique combinations in C where the candidate numbers sums to T.Each numb...
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其他好文 时间:
2014-08-24 23:29:33
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176
原文地址为:http://www.drdobbs.com/cpp/c11-uniqueptr/240002708
在C++11中加入了很多的新特性,unique_ptr一枝独秀,对于动态分配的内存对象,它简单有效。虽然它不是万能的,但是它做的已经够好了:利用简单的语法便可以管理动态分配的对象。
基本语法:
unique_ptr 是一个模板类,你可以很简单地构造一个unique_ptr...
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编程语言 时间:
2014-08-24 16:44:52
阅读次数:
238