SQL Practice - July 3,18 One day off for yesterday because of overtime work. Again, two questions for today. Question 1:Consecutive Numbers Source: Leetcode Write a SQL query to find all numbers that appear at least three times consecutively. For example, given the above Logs table, 1 is...
6.LEETCODE（⭐⭐⭐）https://leetcode-cn.com/problemset/database/ LEETCODE上面有很多算法类...
If you are a Leetcode user, you can practice SQL on it too. Thecollection of SQL questionson LeetCode is quite diverse, with varying difficulty levels and topics. You can also filter questions by the tag: the tags correspond to the names of the companies. However, you can access only a...
LeetCode is one of the most well-known online judge platforms to help you enhance your skills, expand your knowledge and prepare for technical interviews. LeetCode is for software engineers who are looking to practice technical questions and advance their skills. Mastering the questions in each ...
SQLZoo: Offers interactive SQL tutorials and quizzes to practice SQL queries for various database systems. LeetCode: Provides SQL challenges and contests to test and improve your SQL skills. HackerRank: Offers a SQL domain with a wide range of SQL problems and challenges. ...
数据查询语言:DQL(Data Query Language):SELECT 数据操纵语言:DML(Data Manipulation Language):INSERT、DELETE、UPDATE 数据控制语言:DCL(Data Control Language):GRANT、REVOKE、COMMIT、ROLLBACK 一、数据定义 关系数据库系统支持三级模式结构,其模式,外模式,内模式中的基本对象有模式、表、视图和索引,所以SQL的数据定...
Practice Platforms SQLBolt HackerRank SQL Challenges LeetCode Database Problems AI-Powered Tools AI2sql: Generate SQL queries from natural language descriptions using AI. How to Use This Cheat Sheet Learning: Use this guide as a starting point to learn SQL syntax and concepts. Reference: Quickly...
Useful links, scripts, tools and best practice for Microsoft SQL Server Database - ktaranov/sqlserver-kit
Practice Regularly: Solve SQL problems on platforms like LeetCode, HackerRank, or SQLZoo to sharpen your skills. Optimize Queries: Focus on writing efficient queries by using proper indexing and understanding query plans. Know Advanced Concepts: Be prepared to discuss window functions, CTEs, normalizat...
article. Remember, the best way to cement the concepts and get better at SQL is by practicing and solving SQL problems. Some of the examples above were inspired byW3School. You can find more interactive exercises in websites likehackerrankandLeetCodewhich have engaging UI to help you study ...