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搜索关键字:unique constraint    ( 5568个结果
候选键(unique)
foreign key references 除了关联外键,还可以关联 候选键(unique)需求table1 中的 status int 类型 ,表示状态 ,0 未启动 ,1 已启动,2 已完成table2 中 id int identity(1,1) primary key ,statusTyp...
分类:其他好文   时间:2014-06-29 06:11:54    阅读次数:235
Permutation Sequence
The set[1,2,3,…,n]contains a total ofn! unique permutations.By listing and labeling all of the permutations in order,We get the following sequence (ie...
分类:其他好文   时间:2014-06-29 06:03:23    阅读次数:260
Longest Palindromic Substring
Given a stringS, find the longest palindromic substring inS. You may assume that the maximum length ofSis 1000, and there exists one unique longest pa...
分类:其他好文   时间:2014-06-28 23:59:00    阅读次数:383
Leetcode:Combination Sum 子集和问题
Combination Sum:Given a set of candidate numbers (C) and a target number (T), find all unique combinations inCwhere the candidate numbers sums toT.The...
分类:其他好文   时间:2014-06-28 22:48:01    阅读次数:256
[LeetCode] 4Sum
Given an arraySofnintegers, are there elementsa,b,c, anddinSsuch thata+b+c+d= target? Find all unique quadruplets in the array which gives the sum of ...
分类:其他好文   时间:2014-06-28 20:04:03    阅读次数:223
LeetCode: Permutation Sequcence 题解
The set[1,2,3,…,n]contains a total ofn! unique permutations.By listing and labeling all of the permutations in order,We get the following sequence (ie...
分类:其他好文   时间:2014-06-21 13:18:17    阅读次数:218
SQL 主键 自动编号 主键自增
1.新建一数据表,里面有字段id,将id设为为主键代码如下:create table tb(id int,constraint pkid primary key (id)) create table tb(id int primary key )2.新建一数据表,里面有字段id,将id设为主键且自动...
分类:数据库   时间:2014-06-21 12:07:51    阅读次数:242
Leetcode:Combination Sum
Description:Given a set of candidate numbers (C) and a target number (T), find all unique combinations inCwhere the candidate numbers sums toT.Thesame...
分类:其他好文   时间:2014-06-21 06:55:48    阅读次数:200
Leetcode: Combination Sum
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...
分类:其他好文   时间:2014-06-20 23:37:29    阅读次数:195
Spring MVC 表单验证
1. 基于JSR-303(一个数据验证的规范): import javax.validation.constraints.Min;import javax.validation.constraints.NotNull;import org.hibernate.validator.constraint...
分类:编程语言   时间:2014-06-20 23:28:47    阅读次数:364
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