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oracle中rank() over, dense_rank(), row_number() 的区别
假设现在有一张学生表student,学生表中有姓名、分数、课程编号,现在我需要按照课程对学生的成绩进行排序。 select * from student 1. rank over ()可以实现对学生排名,特点是成绩相同的两名是并列,如下1 2 2 4 5 2. dense_rank()和rank over()很像,但学生成绩并列后并不会空出并列所占的名次,如下1 2 2...
分类:数据库   时间:2015-04-16 15:46:25    阅读次数:139
leetcode025:Reverse Nodes in k-Group
问题描述 Given a linked list, reverse the nodes of a linked list k at a time and return its modified list. If the number of nodes is not a multiple of k then left-out nodes in the end should remai...
分类:其他好文   时间:2015-04-16 14:22:29    阅读次数:208
LeetCode6 ZigZag Conversion
描述:The string"PAYPALISHIRING"is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font...
分类:其他好文   时间:2015-04-16 14:11:13    阅读次数:132
jQuery中的类型判断
在JQuery中有一个type方法,在1.11.2中是这样写的 1 var class2type = {}; 2 var toString = class2type.toString; 3 jQuery.each("Boolean Number String Function Array Date ...
分类:Web程序   时间:2015-04-16 13:56:56    阅读次数:140
Build Lowest Number by Removing n digits from a given number
Given a string ‘str’ of digits and an integer ‘n’, build the lowest possible number by removing ‘n’ digits from the string and not changing the order ...
分类:其他好文   时间:2015-04-16 11:49:38    阅读次数:179
[POJ 1365] Prime Land
Prime LandTime Limit:1000MSMemory Limit:10000KTotal Submissions:3211Accepted:1473DescriptionEverybody in the Prime Land is using a prime base number s...
分类:其他好文   时间:2015-04-16 11:45:47    阅读次数:157
LeetCode --- 104. Maximum Depth of Binary Tree
题目链接:Maximum Depth of Binary Tree Given a binary tree, find its maximum depth. The maximum depth is the number of nodes along the longest path from the root node down to the farthest leaf node. 这道题...
分类:其他好文   时间:2015-04-16 10:25:57    阅读次数:123
zoj2000 Palindrome Numbers
Palindrome Numbers Time Limit: 2 Seconds      Memory Limit: 65536 KB A palindrome is a word, number, or phrase that reads the same forwards as backwards. For example, the name "anna" is a palind...
分类:其他好文   时间:2015-04-16 09:10:30    阅读次数:143
create auto increment row with select in postgreSQL
http://stackoverflow.com/questions/3959692/rownum-in-postgresqlSELECT row_number() OVER (ORDER BY col1) AS i, e.col1, e.col2, ... FROM...
分类:数据库   时间:2015-04-16 07:57:38    阅读次数:129
[leetcode]算法题目 - Reverse Nodes in k-Group
Given a linked list, reverse the nodes of a linked listkat a time and return its modified list.If the number of nodes is not a multiple ofkthen left-o...
分类:编程语言   时间:2015-04-16 06:35:47    阅读次数:198
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