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经典SQL练习题
题目地址:http://blog.csdn.net/qaz13177_58_/article/details/5575711sqlserver版本 29,30再议。。select SName,Ssex,class from STUDENTselect distinct depart from tea...
分类:数据库   时间:2014-11-24 15:01:39    阅读次数:290
Distinct Subsequences
Dynamic ProgrammingGiven a stringSand a stringT, count the number of distinct subsequences ofTinS.A subsequence of a string is a new string which is f...
分类:其他好文   时间:2014-11-24 09:52:39    阅读次数:131
Mysql常用知识
一、常用关键词:1.distinct:过滤重复select distinct create_user_name from bms_project; 此种情况下,就要用到distinct过滤掉重复的。2.count: 统计select count(*) from bms_project; 查询bms_...
分类:数据库   时间:2014-11-23 21:24:36    阅读次数:238
【leetcode】Subsets (Medium) ☆
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 co...
分类:其他好文   时间:2014-11-23 17:25:14    阅读次数:198
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:2014-11-23 14:34:54    阅读次数:158
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 co...
分类:其他好文   时间:2014-11-23 11:42:48    阅读次数:233
js去除数组中重复值
//第三种方法加强版 Array.prototype.distinct=function(){ var sameObj=function(a,b){ var tag = true; if(!a||!b)return false; for(var x in a){ if(!b[x]) return f...
分类:编程语言   时间:2014-11-22 17:18:20    阅读次数:151
Distinct<TSource>(IEqualityComparer<TSource> comparer) 根据列名来Distinct
1. DistinctEqualityComparer.cs public class DistinctEqualityComparer : IEqualityComparer { private Func keySelector; public DistinctEqualityComparer(F...
分类:其他好文   时间:2014-11-21 23:07:47    阅读次数:263
查看MYSQL数据库中所有用户及拥有权限
查看MYSQL数据库中所有用户mysql>SELECT DISTINCT CONCAT('User: ''',user,'''@''',host,''';') AS query FROM mysql.user;+---------------------------------------+| qu...
分类:数据库   时间:2014-11-21 18:23:45    阅读次数:256
【leetcode】Climbing Stairs (easy)
You are climbing a stair case. It takesnsteps to reach to the top.Each time you can either climb 1 or 2 steps. In how many distinct ways can you climb...
分类:其他好文   时间:2014-11-21 18:03:09    阅读次数:173
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