网址为LeetCode Problems 176,181,196,197,627 EASY题: 176.Second Highest Salary 这道题要求用SQL语句查找出第二高的薪水,如果没有,就返回NULL 错误解答: SELECTSalaryASSecondHighestSalaryFROMEmployeeORDERBYSalaryDESCLIMIT1,1; 原因是如果只有一条记录或者只存在两条相同薪水的记录,结果返回的是空值而不是NULL...
脚撕LeetCode(627sql)Easy 代码语言:javascript 代码运行次数:0 |id|name|sex|salary||--|---|---||1|A|m|2500||2|B|f|1500||3|C|m|55004|D|f|500| https://leetcode-cn.com/problems/swap-salary/ 运行你所编写的更新语句之后,将会得到以下表: 代码语言:javascript 代码运行次数:0 运行 AI代...
https://leetcode-cn.com/problems/search-insert-position/ 代码随想录 2020/06/19 3320 【Leetcode-27.移除元素 -35.搜索插入位置】 数组搜索intleetcode遍历 题目:给你一个数组 nums 和一个值 val,你需要原地移除所有数值等于 val 的元素,并返回移除后数组的新长度。 不要使用额外的数组空间,你必须仅使用...
还有一种用法,比如看还有多少没做,或者没做的题中有多少Easy, Medium和Hard,先选Unsolved Problems的filter,再用控制台运行该代码。 1//Count Problems2varlist = $("tbody > tr").not(".hide"), tdlist, html;3console.log("---Count Problems: " +list.length);4varcountEasy = 0, countMedium = ...
链接:https://leetcode-cn.com/problems/max-consecutive-ones 二、题解# 方法一:基础法# 此题很简单,当使用一个for循环遍历数组nums时,取一个元素nums[i],若nums[i]为1,则记录最大连续1个数的临时变量temp自增1,接下来比较temp与max的大小,若max<temp,则更新max,表明找到了最终的最大连续1个数。若nums...
interact with any database like ORACLE, SQL ,MYSQL etc. SQL is easy to learn. The statements are all made up of descriptive English words, and there aren't that many of them. SQL is actually a very powerful language and by using its language elements you can ...
LeetCode-SQL-Solutions Description The SQL 50 on LeetCode provided an extensive collection of SQL problems covering a wide range of concepts and techniques. This challenge included easy, medium and hard level questions from various topics like- Selects Basic Joins Basic Aggregate Functions Sorting an...
如果你是纯小白,建议一上来先刷刷前200中的Easy题,从Two Sum开始,找找感觉,后续再按照标签分类刷Medium,最后再刷全Hot 100和 前200题。 几年前,我准备秋招看数据结构刷算法的时候,并没有好的方法和要领,只是拿着被奉为算法圣经的《算法导论》一通啃,越啃越心惊胆战,越啃越觉得遥遥无期,整个人都魔怔了。
Combine Two Tables LeetCode Solution | LeetCode Problems For Beginners | LeetCode Problems & Solutions | Improve Problem Solving Skills | LeetCode Problems Java | LeetCode Solutions in SQL Hello Programmers/Coders, Today we are going to share solutions to the Programming problems of LeetCode ...
| movie | varchar | | description | varchar | | rating | float | +---+---+ id is the primary key (column with unique values) for this table. Each row contains information about the name of a movie, its genre, and its rating. rating is a 2 decimal places ...