Hackerrank sql solving problems Relational Algebra. It is organized into six folders, each containing my solutions for easy, medium and difficult challenges executed in a MySQL environment. Follow. We use cookies to ensure you have the best browsing experience 3 days ago · Problem. Sep 12, 2020 · 📗 Solutions of more than 380 problems of Hackerrank accross several domains. 95%. Whether you are a beginner or an experienced coder, this repository aims to provide clear and efficient solutions to help you improve your problem-solving skills. Sweet, we've sent you an email confirming your registration! You can tell your friends about SQL Practice You might like to solve practice problems on HackerRank. 5 days ago · You signed in with another tab or window. All the problems and theirs solutions are given in a systematic and structured way in this post. Given the CITY and COUNTRY tables, query the sum of the populations of all cities where the CONTINENT is ‘Asia’. . Dec 31, 2023 · Introduction. Q. Starts in. Regex. Draw The Triangle 2. Record, reapply and repeat. Status. Easy SQL (Basic) Max Score: 10 Success Rate: 99. e. Apr 28, 2024 · Cracking the Problem Solving Questions: Insights from HackerRank's Certification Tests for Software Engineer Interns "Mastering Problem-Solving and SQL related Questions for a HackerRank Software Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Revising the Select Query I. It took me a bit more than two weeks (on and off between work, This repository contains my solutions to various SQL challenges on HackerRank, organized by categories and difficulty levels. In the dynamic world of coding and programming, platforms like LeetCode and HackerRank have emerged as frontrunners in helping individuals hone their coding skills. Sep 16, 2024. Write a query to print the hacker_id, name, and the total number of challenges created by each Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. This competency area includes usage of hash maps, stacks, queues, heaps, and analyzing run-time complexities and space complexities, among others. Julia asked her students to create some coding challenges. Hello coders, in this post you will get all the solution of HackerRank SQL Solutions. zee. It contains solutions to various SQL problems organized by topics, allowing users to enhance their SQL skills systematically. solutions to various problem solving (programming) exercises - yaru22/problem-solving Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. Medium SQL (Intermediate) Max Score: 30 Success Rate: 96. Output one of the following for each node: Root: If node is root node. However, in the above query I have tried sticking to using standard SQL. This repository contains my solutions to the challenges, along with some explanations and any additional resources used. Each solution is designed to demonstrate various SQL techniques Julia asked her students to create some coding challenges. Explore; Problems; Contest; Discuss; Interview. Skills. Link to HackerRank problem is here Download the dataset and  · GitHub is where people build software. If there is more than one smallest or largest city, choose the one that comes first when SQL (Basic) SQL (Intermediate) SQL (Advanced) Difficulty. These solutions are implemented 5 days ago · Write a query to find the node type of Binary Tree ordered by the value of the node. The following is a list of possible problems per certificate. SQL Jul 20, 2024 · We welcome contributions to enhance this collection of HackerRank 30 Days of Code solutions: Improve Existing Solutions: Optimize or clarify current solutions. We shall use recursive sql to solve the given problem. This 75-minute exam, shaped by feedback from 2,000 corporate partners, aligns closely with the demands of real-world jobs [1]. 5 Star - Gold. Points Needed. Problem Solving (Basic) Get Certified. Write queries in MySQL syntax. 03%. This competency area Oct 17, 2023 · In the past few days, I finally completed all the SQL questions on HackerRank. Apr 13, 2016 · Join the contest and write queries fast to climb the leaderboard. 6 days ago · Problem. Jan 2, 2024 · The Ugly. sql at master · Shounok/hackerrank-sql-solutions Join over 11 million developers in solving code challenges on HackerRank, presents. Mar 15, 2024 · With a passion for problem-solving. BigNumber. Sep 13, 2022 · In this video, we will learn how to solve a complex SQL query. Functional Programming. Oct 22, 2024 · SQL (Structured Query Language) is a powerful tool used for managing and manipulating relational databases. Info; Rules; Scoring; Info. 450. Pivot the Occupation column in OCCUPATIONS so that each Name is sorted alphabetically and displayed underneath its corresponding Occupation. Python (Basic) Get Certified. CountryCode and COUNTRY. Nov 4, 2023 · That’s all I can share to solve some problems in SQL HackerRank (Difficulaty Easy). Thanks for stopping by! Hard SQL (Intermediate) Max Score: 50 Success Rate: 85. 94%. SQL, Problem Solving & Math) <\> hackerrank hackerrank-python hackerrank-solutions hackerrank-java hackerrank-cpp hackerrank-sql hackerrank-math. Reload to refresh your session. Data Structures. hackerrank hackerrank-python hackerrank-solutions hackerrank-sql. If you are doing language-specific challenges rather than doing algorithm or Aug 5, 2024 · Starting today, I’m starting to solve HackerRank SQL exercises, and I’m excited to share how I do it with you! First up, I’ll be trying to solve the ‘Blunder’ challenge. This repository contains solutions to Hackerrank practice problems in SQL, C++, Java Python and Problem Solving (Data Structures and Algorithms). Welcome to the HackerRank Problem Solutions repository! This repository contains solutions to various HackerRank challenges that I’ve tackled, organized by problem categories and difficulty levels. Solutions to HackerRank practice, tutorials and interview preparation problems with Python, SQL, C# and JavaScript - nathan-abela/HackerRank-Solutions You can earn the following badges by solving challenges on HackerRank : Problem Solving (Algorithms and Data Structures) Language Proficiency. This repository contains solutions to various SQL challenges and problems solved on HackerRank. It serves as a record of my progress and showcases my understanding of SQL concepts and problem-solving skills. The SQL problem is taken from HackerRank. Each solution includes a brief explanation of the problem and my approach to solving it. The exam had 2 coding test problems that had to be completed within 90 minutes. github mysql sql certificate hackerrank hacker hackerrank-solutions hackerrank-challenges hackerrank-sql hackerrank-certificates hakerrank-problem-solving mysqlchallenges. Dec 23, 2024 · Problem. Updated Dec 24, 2023; Solutions to Certification of Problem Solving Basic on Hackerrank. 300. Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. 4 Star - Silver. 80. Sort your results by the total number of challenges in I have tried to provide the complete solution with possible explanation to all SQL Practice problem on HackerRank. - ashraf789/Hackerrank-problem-solving In this course we will be solving problems on the Northwind and AdventureWorks2012 database, and also along with that we will also solve some HackerRank SQL challenges. Jul 5, 2024 · Python Solutions: A collection of solutions to HackerRank problems solved using Python. 2 of 6; Choose a language Select the language you wish to use to Jan 28, 2023 · Eventually, I decided to try taking the Problem Solving (Basic) certification exam from Hackerrank. C++; Java; Python; Specialized Skills. " Learn more Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. Record. ; Solved 100+ SQL queries (Basic, Intermediate and Advance level) in HackerRank by using MySQL, MS SQL Server and Oracle. Hopefully it can be understood, if there is a response, please leave it in the response section below. Select By ID. Write a query to print the hacker_id, name, and the total number of challenges created by each student. Databases. The STATION table is described as Jan 20, 2024 · Solutions to Certification of Problem Solving Basic on Hackerrank. SQL. SQL; Sql - Badge Level. For software engineers, this process is deeply embedded in their daily workflow. ; Add Explanations: Provide detailed explanations of code and problem-solving approaches. Whether we are beginners or experienced professionals, practicing SQL exercises is important for improving Query the two cities in STATION with the shortest and longest CITY names, as well as their respective lengths (i. Some challenges include additional information to help you out. Welcome to the HackerRank Solutions repository, where you can find comprehensive solutions to various HackerRank problems implemented in SQL. Indexes. Solve over 80 SQL exercises using real life case studies. We use cookies to ensure you have the best browsing experience SQL (Basic) SQL (Intermediate) SQL (Advanced) Difficulty.  · You signed in with another tab or window. It is organized into six folders, each containing my solutions for Another way to solve this query is using the pivot function in T-SQL. They are unnecessarily long, and the Easy SQL (Advanced) Max Score: 25 Success Rate: 96. You can find me on hackerrank here. This course is meant for all levels, so whether you are a beginner, intermediate or Crack SQL Interview in 50 Qs. Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. I called it the RRR approach. Subdomains. Object Oriented Programming. So, without wasting any time, let’s jump to the Hello coders, today we are going to solve Challenges HackerRank Solution in SQL. Easy SQL (Advanced) Max Score: 25 Success Rate: 97. ; Multiple Language Implementations: Add solutions in other programming languages. SQL Problem Solutions on HackerRank This repository contains my solutions to various SQL problems from HackerRank. This repository contains my solutions to all the HackerRank SQL Practice Questions. Write a query identifying the type of each record in the TRIANGLES table using its three side lengths. Basic Data Types. Sets. Advanced Select. HackerRank SQL Problems and Solutions —2. 1 Star - Bronze. Medium SQL (Intermediate) Max Score: 30 Success Rate: 97. Join over 23 million developers in solving code challenges on HackerRank, one of the Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Each case study presents a real-world business scenario, and you are tasked with answering a series of questions using SQL queries. Jan 8, 2025 · The HackerRank Software Engineer Certification tests crucial skills like problem-solving, SQL, and REST APIs – key abilities for junior software and backend developers. No responses yet. Strings. 02%. Aug 19, 2022 · HackerRank SQL Problems Solved PART 1. Jul 25, 2023 · Solving a Tricky HackerRank SQL Problem — Combining Queries with ORDER BY. Output one of the following statements for each record in the table: Equilateral: It’s a triangle with 3 sides You can earn the following badges by solving challenges on HackerRank : Problem Solving (Algorithms and Data Structures) Language Proficiency. com practice problems using Python 3, С++ and Oracle SQL. These solutions cover a wide range of topics including algorithms, data structures, and more. Julia just finished conducting a coding contest, and she needs your help assembling the leaderboard! Write a query to print the respective hacker_id and name of hackers who achieved full scores for more than one Problem Solving (Basic) Python (Basic) Problem Solving (Advanced) Python (Intermediate) Difficulty. Nov 10, 2021 · Photo by Roman Synkevych on Unsplash. Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to Easy Problem Solving (Basic) Max Score: 5 Success Rate: 87. You are registered for the contest. NoSQL - XML, MapReduce. Accelerate your Job Search. Harry Potter and his friends are at Ollivander’s with Ron, finally replacing Charlie’s old broken wand. Join over 23 million developers in solving code challenges on HackerRank Feb 19, 2021 · Hackerrank_SQL_solution. Basic to intermediate SQL topics 50 essential SQL questions Best for 1 month of prep time; Award. You switched accounts on another tab or window. Hard SQL (Intermediate) Max Score: 50 Success Rate: 85. This collection serves as a useful resource for improving SQL skills and problem-solving techniques. Input SQL (Basic) SQL (Intermediate) SQL (Advanced) Difficulty. Hard. I hope Apr 21, 2023 · Add this topic to your repo To associate your repository with the hackerrank-sql-problems topic, visit your repo's landing page and select "manage topics. 99%. Thank you! Medium SQL (Intermediate) Max Score: 30 Success Rate: 96. Weather Observation Station 20. Problem statement: From my experience, understanding the problem statement on HackerRank takes up to 75% of the time allotted for solving a medium- to hard-level problem. To get a certificate, two problems have to be solved within 90 minutes. cracking-the-coding-interview algorithm-challenges coding-challenges hackerrank-sql. Preparation Kits View all kits. More from Sonali jain. PL/SQL is an extension of SQL language that combines the data manipulation power of SQL with the processing power of procedural language to create super-powerful SQL queries. Top Competitors. Review the problem statement Each challenge has a problem statement that includes sample inputs and outputs. Don’t worry, you don’t actually have to buy anything. Medium SQL (Intermediate) Max Score: 20 Success Rate: 96. We use cookies to ensure you have the best browsing experience Problem Solving (Intermediate) Difficulty. You can access the problem on Hackerrank if you already have an account. Click on the “Buy Now” button. Jul 24, 2023 · Problem solving, in the simplest terms, is the process of identifying a problem, analyzing it, and finding the most effective solution to overcome it. Binary Tree Nodes. Weather Observation Station 18. Jul 31, 2023 · These strategies have been carefully curated to enhance your problem-solving skills, optimize your approach to algorithmic problems, and make the journey of solving coding challenges an enjoyable one. More than 100 million people use GitHub to discover, fork, and contribute to over 420 million projects. 15 Days of Learning SQL. 3 Star - Silver. Crack SQL Interview in 50 Qs. Use the 100% off coupon code “KCSPurch” to bypass the credit card information, and get a download link sent directly to your email for A: The HackerRank Advanced SQL Certification is a prestigious certification that demonstrates your ability to write complex SQL queries and solve challenging data problems. Here Dec 2, 2021 · Hope y’all enjoyed my long drawn explanation to a simple problem, I’m trying to get better at SQL querying, so if you see any errors or have any suggestions, I am all ears. Introduction. Unions-This competency includes using unions to display multiple sets of information Solving problems is the core of computer science. Unsolved. ; Inner: If node is neither root nor leaf node. It will be open for 24 hours, but make sure you start early because the tiebreaker is the time from the beginning of the contest. It focuses on three main areas: solutions to various problem solving (programming) exercises - yaru22/problem-solving Easy SQL (Advanced) Max Score: 25 Success Rate: 96. Crack your coding interview and get hired. Key Competencies: Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. 56%. Hey there, fellow Data Folks and SQL Ninjas! Today, I want to share a simple solution to a challenging Hackerrank problem using MySQL. com. The output column headers should be Doctor, Professor, Singer, All my solutions to get 5 * (gold) badge in both SQL and Problem solving. com practice problems using Python 3, С++ and Oracle SQL - marinskiy/HackerrankPractice Oct 19, 2021 · Current projects at work require more SQL skills, so I took the time to brush up my SQL knowledge using the HackerRank coding challenges platform. Database Normalization. Linux Shell. 50%. Code are matching key columns. SQL 50. This hard-level problem was the last one I finished, and it took me quite some time to figure out the solution. SQL Solutions: A collection of SQL queries that solve various database-related problems on HackerRank. Automated the process of adding solutions using Hackerrank Solution Crawler. Verify your Problem Solving Skills. to. Stand out from the crowd. The case (uppercase The solutions of all the SQL challenges for all easy, medium and hard challenges on HackerRank executed on MySQL environment compiled with helpful Resources & references related to the challenges. here, we will see HackerRank SQL problems with solutions, let's dive into This article will help you in revising basic SQL queries and. ; Leaf: If node is leaf node. Solve Challenge This repository contains my SQL solutions to HackerRank challenges, organized by difficulty: Easy, Medium, and Hard. You can view challenges of the previous SQL contest Simply SQL and also practice at SQL domain to prepare yourself for the contest. Problem 1. If you want to  · Mount Blue is conducting a contest and the person who solves all the problems gets an opportunity for an entry level SDE developer role,and this repository for the storage and display of solutions to various problems of this contest on Hacker Rank. Updated Apr 27, 2023; SQL (Basic) SQL (Intermediate) SQL (Advanced) Difficulty. Solved. -  · All HackerRank solutions for Python, Java, SQL, C, C++, Algorithms, Data Structures. Jul 20, 2023 · In conclusion, I hope you enjoyed following my journey in solving this tricky HackerRank SQL problem. ” I used the MySQL option on the platform to solve each of the challenges. Jan 12, 2025 · The repository dedicated to solutions for Hacker-rank Database problems, solved with MySQL - hackerrank-sql-solutions/The PADS. While solving all SQL problems from HackerRank, I came across multiple solutions for the same In this post, I’ll share my solutions to some SQL problems on HackerRank, categorized as “Easy. - kilian-hu/hackerrank-solutions. SQLPracticeProblems. These solutions can Complex joins-This competency includes using INNER, LEFT, RIGHT, and FULL joins on multiple tables and using joins for many-to-many relationships. 2 Star - Bronze. Let me explain what that means. Summary. Basic Select. SQL setup script to use if you already have SQL Server 2012 or SQL Server 2014, go to www. Weather Observation Station 4 | Easy | HackerRank Find the difference between the total number of CITY entries in the table and the number of distinct CITY entries in the table. Easy. We use cookies to ensure you have the best browsing experience  · cracking-the-coding-interview algorithm-challenges coding-challenges hackerrank-sql. Each solution is accompanied by comments for clarity, showcasing various approaches and optimizations. : number of characters in the name). At its core, problem-solving focuses on the study, understanding, and usage of data structures and algorithms. Note: CITY. Hard SQL (Advanced) Max Score: 50 Success Rate: 78. This repository tracks my progress through the SQL course on HackerRank. 66%. It is designed for experienced SQL professionals who want to validate their skills and advance their careers. These solutions showcase different SQL techniques and Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Please read our cookie policy for  · Hackerrank Problem solving solutions in Python. 175. We use cookies to ensure you have the best browsing experience Apr 13, 2023 · This repository contains my solutions to various SQL challenges on HackerRank, organized by categories and difficulty levels. Jul 18, 2024 · Welcome to the HackerRank SQL Challenges Solutions repository! This repository contains my solutions to all the HackerRank SQL Practice Questions. We use cookies to ensure you have the best browsing experience Jun 22, 2023 · 19. Hermione decides the best way to choose is by determining the minimum number of gold galleons needed to buy 6 days ago · Problem. Dec 19, 2024 · Solutions to HackerRank / GeeksforGeeks / LeetCode Questions: C, C++, Python, Problem Solving, SQL, 30 Days of Code and much more (400+ problems) - afrozchakure  · 170+ solutions to Hackerrank. 74%. Solve Challenge. Store. Updated Jul 31, 2024; Python; kg-0805 / HackerRank-Solutions. Easy Problem Solving (Intermediate) Max Score: 5 Success Rate: 96. 65%. Easy SQL (Basic) Max Score: 10 Success Rate: 95. About. We use cookies to ensure you have the best browsing experience 170+ solutions to Hackerrank. But technical problem solving lies at the heart of programming, and most coding questions are designed to test a candidate’s problem-solving abilities. Add a description, image, and links to the hackerrank-problem-solving topic page so that developers can more easily At its core, problem-solving focuses on the study, understanding, and usage of data structures and algorithms. certificate hackerrank problem-solving hackerrank-python hackerrank-solutions. About I have solved various HackerRank SQL problems using MySQL May 13, 2023 · HackerRank is a valuable platform for learning SQL as it offers practical challenges, fosters problem-solving skills, provides learning resources, and encourages community interaction. Basics of Sets and Relations #2. 2 of 6; Choose a language Select the language you wish to use to Review the problem statement Each challenge has a problem statement that includes sample inputs and outputs. 650. View on GitHub Hackerrank. Problem Solving (Basic) Medium SQL (Intermediate) Max Score: 20 Success Rate: 96. Add a description, image, and links to the hakerrank-problem-solving topic page so that developers can more easily learn about it. Problem Solving (Basic) Difficulty. ; Improve You can earn the following badges by solving challenges on HackerRank : Problem Solving (Algorithms and Data Structures) Language Proficiency. New Companies. Feb 3, 2022 · Problem solving itself might at first seem like it’s taking a back seat. SQL (Basic) SQL (Intermediate) SQL (Advanced) Difficulty. Aggregation. ; If you are interested in adding more Hackerrank problem solutions, please feel free to Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. 15%. 2 of 6; Choose a language Select the language you wish to use to  · Solutions to Problems For SQL on Leetcode, Hackerrank & DataLemur. We use cookies to ensure you have the best browsing experience on our website. 6: Binary Tree Nodes: Solution: We can write this query using simple case when statements. Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Programmers must first understand how a human solves a problem, then understand how to translate this "algorithm" into something a computer can do, and finally, how to write the specific code to implement the solution. Hackerrank — Divisible Sum Pairs. Medium. Nov 26, 2024 · The 8 Week SQL Challenge by Danny Ma is a series of case studies designed to help you improve your SQL skills. This competency area includes basic data structures and algorithms. Solutions of more than 380 problems of Hackerrank across several domains. Please read our cookie policy for A collection of solutions to competitive programming exercises on HackerRank. Practice queries on Select, Where, Limit, Order by, Aggregates, Group by, Joins, Sub-queries and Case expressions. 2 of 6; Choose a language Select the language you wish to use to Jan 28, 2024 · You signed in with another tab or window. Stay tuned as I’ll share more of my Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. Mar 12, 2024 · The solutions of all the SQL challenges for all easy, medium and hard challenges on HackerRank executed on MySQL environment compiled with helpful Resources & references related to the challenges. OLAP. The goal of this repository is to document and share SQL queries that I have This repository contains my SQL solutions to HackerRank challenges, organized by difficulty level: Easy, Medium, and Hard. 82%. Set and Algebra. Basic. You signed out in another tab or window. Basic Join. Problem Solving, SQL, 30 Days of Code and much more (400+ problems) python sql leetcode cpp codechef competitive-programming hackerrank geeksforgeeks codeforces leetcode-solutions hacktoberfest hackerrank-solutions codewars-solutions hackerrank-algorithms-solutions hackerrank-challenges  · Hackerrank Problem solving solutions in Python. xzvh jztxln ftnj vaftq riednl joaeetu ejbp idpg vprkh fdyy