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摘要: 本文来自《MySQL从入门到精通》国家863中部软件孵化器 编著。仅为个人笔记,若想了解更多,建议买书详读。 一)准确认识数据、数据库、数据库系统、数据库管理系统 1)数据(Data)是数据库中存储的基本对象,是数据库存储的最基本元素。 2)存储数据的“仓库”称之为数据库(Dataase, DB); 阅读全文
posted @ 2017-07-05 22:04 王大咩的图书馆 阅读(226) 评论(0) 推荐(0) 编辑
摘要: Given a m x n grid filled with non-negative numbers, find a path from top left to bottom right which minimizes the sum of all numbers along its path. 阅读全文
posted @ 2017-07-05 16:50 王大咩的图书馆 阅读(270) 评论(0) 推荐(0) 编辑
摘要: 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 阅读全文
posted @ 2017-07-05 15:46 王大咩的图书馆 阅读(221) 评论(0) 推荐(0) 编辑
摘要: 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 p 阅读全文
posted @ 2017-07-05 15:12 王大咩的图书馆 阅读(257) 评论(0) 推荐(0) 编辑
摘要: Given a string s and a dictionary of words dict, add spaces in s to construct a sentence where each word is a valid dictionary word. Return all such p 阅读全文
posted @ 2017-07-05 10:37 王大咩的图书馆 阅读(207) 评论(0) 推荐(0) 编辑
摘要: 本文为实验楼相关章节的上级操作。 一)创建一个数据库test,并切换到该数据库,在数据库test 中创建一个表,并插入数据, 1)创建并切换 2)创建表格并插入数据 显示表中所有数据: 二)查询语句 1)寻找列的最大值 使用MAX()函数技术物品号article的最大值。 2)查询某列最大值所在行 阅读全文
posted @ 2017-07-05 01:36 王大咩的图书馆 阅读(213) 评论(0) 推荐(0) 编辑
摘要: Given a string s and a dictionary of words dict, determine if s can be segmented into a space-separated sequence of one or more dictionary words. For 阅读全文
posted @ 2017-07-04 18:27 王大咩的图书馆 阅读(209) 评论(0) 推荐(0) 编辑
摘要: Given a string S and a string T, count the number of distinct subsequences of T in S. A subsequence of a string is a new string which is formed from t 阅读全文
posted @ 2017-07-04 17:50 王大咩的图书馆 阅读(194) 评论(0) 推荐(0) 编辑
摘要: Given a triangle, find the minimum path sum from top to bottom. Each step you may move to adjacent numbers on the row below. For example, given the fo 阅读全文
posted @ 2017-07-04 16:05 王大咩的图书馆 阅读(156) 评论(0) 推荐(0) 编辑
摘要: Given a string s, partition s such that every substring of the partition is a palindrome. Return the minimum cuts needed for a palindrome partitioning 阅读全文
posted @ 2017-07-04 10:18 王大咩的图书馆 阅读(394) 评论(0) 推荐(0) 编辑
摘要: There are N children standing in a line. Each child is assigned a rating value. You are giving candies to these children subjected to the following re 阅读全文
posted @ 2017-07-03 21:11 王大咩的图书馆 阅读(257) 评论(0) 推荐(0) 编辑
摘要: Determine whether an integer is a palindrome. Do this without extra space. click to show spoilers. Some hints: Could negative integers be palindromes? 阅读全文
posted @ 2017-07-03 17:10 王大咩的图书馆 阅读(204) 评论(0) 推荐(0) 编辑
摘要: 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 ma 阅读全文
posted @ 2017-07-03 16:39 王大咩的图书馆 阅读(148) 评论(0) 推荐(0) 编辑
摘要: Given n non-negative integers a1 , a2 , ..., an , where each represents a point at coordinate (i, ai ). n vertical lines are drawn such that the two e 阅读全文
posted @ 2017-07-03 16:14 王大咩的图书馆 阅读(263) 评论(0) 推荐(0) 编辑
摘要: Given an array S of n integers, are there elements a, b, c in S such that a + b + c = 0? Find all unique triplets in the array which gives the sum of 阅读全文
posted @ 2017-07-03 00:44 王大咩的图书馆 阅读(209) 评论(0) 推荐(1) 编辑
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