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sql server group by having 之复习篇
where 与 having 之间的差别在于where 是分组前的过滤,而having是分组后的过滤Group By中Select指定的字段限制示例3select 类别, sum(数量) as 数量之和, 摘要from Agroup by 类别order by 类别 desc示例3执行后会提示下错误...
分类:数据库   时间:2014-06-09 15:37:29    阅读次数:350
Binary Tree Zigzag Level Order Traversal
题目 Given a binary tree, return the zigzag level order traversal of its nodes' values. (ie, from left to right, then right to left for the next level and alternate between). For example: G...
分类:其他好文   时间:2014-06-08 17:29:07    阅读次数:315
Binary Tree Level Order Traversal
题目  Given a binary tree, return the level order traversal of its nodes' values. (ie, from left to right, level by level). For example: Given binary tree {3,9,20,#,#,15,7}, 3 / \...
分类:其他好文   时间:2014-06-08 16:38:02    阅读次数:194
leetcode——Add Two Numbers 两个链表表示的正整数对其求和(AC)
You are given two linked lists representing two non-negative numbers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two numbers and return it as a link...
分类:其他好文   时间:2014-06-08 15:30:28    阅读次数:227
Binary Tree Level Order Traversal II
题目 Given a binary tree, return the bottom-up level order traversal of its nodes' values. (ie, from left to right, level by level from leaf to root). For example: Given binary tree {3,9,20...
分类:其他好文   时间:2014-06-08 09:23:34    阅读次数:230
Subsets II
题目 Given a collection of integers that might contain duplicates, S, return all possible subsets. Note: Elements in a subset must be in non-descending order.The solution set must not c...
分类:其他好文   时间:2014-06-08 05:32:21    阅读次数:196
[Oracle] 分析函数(1)- 语法
语法概述 下面看一个例子简单过下语法: 例: sum(sal) over (partition by deptno order by ename) new_alias sum就是函数名 (sal)是分析函数的参数,每个函数有0~3个参数,参数可以是表达式,例如:sum(sal+comm) over() 是开窗函数,这是开启分析函数的起点,对于既可作为聚集函数又可作为分析函...
分类:数据库   时间:2014-06-08 05:09:07    阅读次数:329
[LeetCode] Remove Element [20]
题目 Given an array and a value, remove all instances of that value in place and return the new length. The order of elements can be changed. It doesn't matter what you leave beyond the new length. 原题链接(点我) 解题思路 给一个数组和一个数字,移除该数字在数组中所有出现的地方。 这是一个非常简单的题目,应...
分类:其他好文   时间:2014-06-08 04:05:50    阅读次数:284
Subsets
题目 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. ...
分类:其他好文   时间:2014-06-08 04:01:05    阅读次数:240
LeetCode:Spiral Matrix I II
Spiral MatrixGiven a matrix of m x n elements (m rows, n columns), return all elements of the matrix in spiral order.For example, Given the following ...
分类:其他好文   时间:2014-06-07 22:57:31    阅读次数:236
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