Hackerrank sql solving problems Basic to intermediate SQL topics 50 essential SQL questions Best for 1 month of prep time; Award. Hey there, fellow Data Folks and SQL Ninjas! Today, I want to share a simple solution to a challenging Hackerrank problem using MySQL. Set and Algebra. We use cookies to ensure you have the best browsing experience on our website. Easy SQL (Basic) Max Score: 10 Success Rate: 99. 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. Problem 1. 82%. Aggregation. Object Oriented Programming. BigNumber. 65%. 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. Sep 16, 2024. 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. Binary Tree Nodes. It is designed for experienced SQL professionals who want to validate their skills and advance their careers. Solutions of more than 380 problems of Hackerrank across several domains. We use cookies to ensure you have the best browsing experience 170+ solutions to Hackerrank. Medium SQL (Intermediate) Max Score: 30 Success Rate: 96. to. 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. 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. I called it the RRR approach. At its core, problem-solving focuses on the study, understanding, and usage of data structures and algorithms. Please read our cookie policy for A collection of solutions to competitive programming exercises on HackerRank. Don’t worry, you don’t actually have to buy anything. SQL. 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. Join over 23 million developers in solving code challenges on HackerRank Feb 19, 2021 · Hackerrank_SQL_solution. Jul 20, 2023 · In conclusion, I hope you enjoyed following my journey in solving this tricky HackerRank SQL problem. Solve Challenge. Solve Challenge This repository contains my SQL solutions to HackerRank challenges, organized by difficulty: Easy, Medium, and Hard. Easy. 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. This competency area includes basic data structures and algorithms. This repository contains my solutions to the challenges, along with some explanations and any additional resources used. 2 Star - Bronze. Solve over 80 SQL exercises using real life case studies. Draw The Triangle 2. View on GitHub Hackerrank. However, in the above query I have tried sticking to using standard SQL. Basics of Sets and Relations #2. 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. Dec 31, 2023 · Introduction. Databases. Problem Solving (Basic) Medium SQL (Intermediate) Max Score: 20 Success Rate: 96. ; Inner: If node is neither root nor leaf node. Hackerrank — Divisible Sum Pairs. 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. You signed out in another tab or window. Starts in. Strings. C++; Java; Python; Specialized Skills. Unions-This competency includes using unions to display multiple sets of information Solving problems is the core of computer science. 6 days ago · Problem. 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. Jul 25, 2023 · Solving a Tricky HackerRank SQL Problem — Combining Queries with ORDER BY. Crack your coding interview and get hired. This hard-level problem was the last one I finished, and it took me quite some time to figure out the solution. Easy SQL (Advanced) Max Score: 25 Success Rate: 97. zee. Basic. SQL, Problem Solving & Math) <\> hackerrank hackerrank-python hackerrank-solutions hackerrank-java hackerrank-cpp hackerrank-sql hackerrank-math. 94%. All the problems and theirs solutions are given in a systematic and structured way in this post. Reload to refresh your session. SQL 50. Top Competitors. here, we will see HackerRank SQL problems with solutions, let's dive into This article will help you in revising basic SQL queries and. 6: Binary Tree Nodes: Solution: We can write this query using simple case when statements. 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. Welcome to the HackerRank Solutions repository, where you can find comprehensive solutions to various HackerRank problems implemented in SQL. 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. This collection serves as a useful resource for improving SQL skills and problem-solving techniques. Each solution is accompanied by comments for clarity, showcasing various approaches and optimizations. 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. OLAP. 50%. Some challenges include additional information to help you out. The exam had 2 coding test problems that had to be completed within 90 minutes. You are registered for the contest. Easy Problem Solving (Intermediate) Max Score: 5 Success Rate: 96. These solutions cover a wide range of topics including algorithms, data structures, and more. Jan 12, 2025 · The repository dedicated to solutions for Hacker-rank Database problems, solved with MySQL - hackerrank-sql-solutions/The PADS. Feb 3, 2022 · Problem solving itself might at first seem like it’s taking a back seat. This repository tracks my progress through the SQL course on HackerRank. Jul 18, 2024 · Welcome to the HackerRank SQL Challenges Solutions repository! This repository contains my solutions to all the HackerRank SQL Practice Questions. 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. Status. Let me explain what that means. Sep 13, 2022 · In this video, we will learn how to solve a complex SQL query. 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. Summary. ; Add Explanations: Provide detailed explanations of code and problem-solving approaches. It contains solutions to various SQL problems organized by topics, allowing users to enhance their SQL skills systematically. 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. Medium. Q. You can view challenges of the previous SQL contest Simply SQL and also practice at SQL domain to prepare yourself for the contest. Regex. Given the CITY and COUNTRY tables, query the sum of the populations of all cities where the CONTINENT is ‘Asia’. 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. Record. Select By ID. 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. 15 Days of Learning SQL. Info; Rules; Scoring; Info. Add a description, image, and links to the hakerrank-problem-solving topic page so that developers can more easily learn about it. It is organized into six folders, each containing my solutions for easy, medium and difficult challenges executed in a MySQL environment. Apr 13, 2016 · Join the contest and write queries fast to climb the leaderboard. Medium SQL (Intermediate) Max Score: 20 Success Rate: 96. Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. ; Improve You can earn the following badges by solving challenges on HackerRank : Problem Solving (Algorithms and Data Structures) Language Proficiency. Harry Potter and his friends are at Ollivander’s with Ron, finally replacing Charlie’s old broken wand. Database Normalization. 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. If there is more than one smallest or largest city, choose the one that comes first when SQL (Basic) SQL (Intermediate) SQL (Advanced) Difficulty. - kilian-hu/hackerrank-solutions. - · All HackerRank solutions for Python, Java, SQL, C, C++, Algorithms, Data Structures. Nov 10, 2021 · Photo by Roman Synkevych on Unsplash. More than 100 million people use GitHub to discover, fork, and contribute to over 420 million projects. " Learn more Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. solutions to various problem solving (programming) exercises - yaru22/problem-solving Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. You can access the problem on Hackerrank if you already have an account. The output column headers should be Doctor, Professor, Singer, All my solutions to get 5 * (gold) badge in both SQL and Problem solving. This course is meant for all levels, so whether you are a beginner, intermediate or Crack SQL Interview in 50 Qs. So, without wasting any time, let’s jump to the Hello coders, today we are going to solve Challenges HackerRank Solution in SQL. This competency area Oct 17, 2023 · In the past few days, I finally completed all the SQL questions on HackerRank. ; Multiple Language Implementations: Add solutions in other programming languages. Medium SQL (Intermediate) Max Score: 30 Success Rate: 97. Follow. Stand out from the crowd. 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. Store. We use cookies to ensure you have the best browsing experience 3 days ago · Problem. 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. 66%. Pivot the Occupation column in OCCUPATIONS so that each Name is sorted alphabetically and displayed underneath its corresponding Occupation. . 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. Automated the process of adding solutions using Hackerrank Solution Crawler. Please read our cookie policy for · Hackerrank Problem solving solutions in Python. 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. Review the problem statement Each challenge has a problem statement that includes sample inputs and outputs. This repository contains solutions to various SQL challenges and problems solved on HackerRank. Data Structures. 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. 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. Hard. Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. Write queries in MySQL syntax. NoSQL - XML, MapReduce. 56%. github mysql sql certificate hackerrank hacker hackerrank-solutions hackerrank-challenges hackerrank-sql hackerrank-certificates hakerrank-problem-solving mysqlchallenges. This 75-minute exam, shaped by feedback from 2,000 corporate partners, aligns closely with the demands of real-world jobs [1]. ” I used the MySQL option on the platform to solve each of the challenges. Write a query to print the hacker_id, name, and the total number of challenges created by each student. For software engineers, this process is deeply embedded in their daily workflow. cracking-the-coding-interview algorithm-challenges coding-challenges hackerrank-sql. 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. Link to HackerRank problem is here Download the dataset and · GitHub is where people build software. We use cookies to ensure you have the best browsing experience Problem Solving (Intermediate) Difficulty. Hard SQL (Advanced) Max Score: 50 Success Rate: 78. - 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. Easy SQL (Basic) Max Score: 10 Success Rate: 95. This repository contains my solutions to all the HackerRank SQL Practice Questions. Dec 23, 2024 · Problem. Code are matching key columns. The STATION table is described as Jan 20, 2024 · Solutions to Certification of Problem Solving Basic on Hackerrank. You can find me on hackerrank here. Relational Algebra. But technical problem solving lies at the heart of programming, and most coding questions are designed to test a candidate’s problem-solving abilities. sql at master · Shounok/hackerrank-sql-solutions Join over 11 million developers in solving code challenges on HackerRank, presents. Indexes. Basic Select. Aug 19, 2022 · HackerRank SQL Problems Solved PART 1. Updated Apr 27, 2023; SQL (Basic) SQL (Intermediate) SQL (Advanced) Difficulty. Hard SQL (Intermediate) Max Score: 50 Success Rate: 85. More from Sonali jain. 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. 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. 2 of 6; Choose a language Select the language you wish to use to · Solutions to Problems For SQL on Leetcode, Hackerrank & DataLemur. This competency area includes usage of hash maps, stacks, queues, heaps, and analyzing run-time complexities and space complexities, among others. Each solution is designed to demonstrate various SQL techniques Julia asked her students to create some coding challenges. 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. Write a query identifying the type of each record in the TRIANGLES table using its three side lengths. 15%. 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. Updated Dec 24, 2023; Solutions to Certification of Problem Solving Basic on Hackerrank. SQL setup script to use if you already have SQL Server 2012 or SQL Server 2014, go to www. Basic Data Types. Hermione decides the best way to choose is by determining the minimum number of gold galleons needed to buy 6 days ago · Problem. We use cookies to ensure you have the best browsing experience Jun 22, 2023 · 19. SQLPracticeProblems. Accelerate your Job Search. 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. Explore; Problems; Contest; Discuss; Interview. 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. 5 Star - Gold. Record, reapply and repeat. 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. Introduction. SQL (Basic) SQL (Intermediate) SQL (Advanced) Difficulty. Output one of the following for each node: Root: If node is root node. 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. 650. Problem Solving (Basic) Difficulty. Points Needed. Input SQL (Basic) SQL (Intermediate) SQL (Advanced) Difficulty. New Companies. SQL; Sql - Badge Level. 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. No responses yet. About. Updated Jul 31, 2024; Python; kg-0805 / HackerRank-Solutions. Unsolved. 5 days ago · You signed in with another tab or window. 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. 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. 03%. Julia asked her students to create some coding challenges. 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. · You signed in with another tab or window. SQL Problem Solutions on HackerRank This repository contains my solutions to various SQL problems from HackerRank. The SQL problem is taken from HackerRank. Note: CITY. We use cookies to ensure you have the best browsing experience · cracking-the-coding-interview algorithm-challenges coding-challenges hackerrank-sql. Solved. Linux Shell. 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. Functional Programming. 95%. Each case study presents a real-world business scenario, and you are tasked with answering a series of questions using SQL queries. It serves as a record of my progress and showcases my understanding of SQL concepts and problem-solving skills. Mar 15, 2024 · With a passion for problem-solving. 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. Problem Solving (Basic) Get Certified. certificate hackerrank problem-solving hackerrank-python hackerrank-solutions. 80. Preparation Kits View all kits. Key Competencies: Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. ; Leaf: If node is leaf node. Hopefully it can be understood, if there is a response, please leave it in the response section below. Sep 12, 2020 · 📗 Solutions of more than 380 problems of Hackerrank accross several domains. We use cookies to ensure you have the best browsing experience SQL (Basic) SQL (Intermediate) SQL (Advanced) Difficulty. Subdomains. Verify your Problem Solving Skills. 450. 99%. com. HackerRank SQL Problems and Solutions —2. e. Oct 22, 2024 · SQL (Structured Query Language) is a powerful tool used for managing and manipulating relational databases. Revising the Select Query I. Thanks for stopping by! Hard SQL (Intermediate) Max Score: 50 Success Rate: 85. Each solution includes a brief explanation of the problem and my approach to solving it. Crack SQL Interview in 50 Qs. You switched accounts on another tab or window. In the dynamic world of coding and programming, platforms like LeetCode and HackerRank have emerged as frontrunners in helping individuals hone their coding skills. Jan 2, 2024 · The Ugly. Click on the “Buy Now” button. Jul 5, 2024 · Python Solutions: A collection of solutions to HackerRank problems solved using Python. Thank you! Medium SQL (Intermediate) Max Score: 30 Success Rate: 96. Python (Basic) Get Certified. 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. Practice queries on Select, Where, Limit, Order by, Aggregates, Group by, Joins, Sub-queries and Case expressions. 3 Star - Silver. 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. Advanced Select. 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. 02%. Weather Observation Station 18. This repository contains solutions to Hackerrank practice problems in SQL, C++, Java Python and Problem Solving (Data Structures and Algorithms). com practice problems using Python 3, С++ and Oracle SQL. They are unnecessarily long, and the Easy SQL (Advanced) Max Score: 25 Success Rate: 96. Sets. Hello coders, in this post you will get all the solution of HackerRank SQL Solutions. CountryCode and COUNTRY. 300. ; Solved 100+ SQL queries (Basic, Intermediate and Advance level) in HackerRank by using MySQL, MS SQL Server and Oracle. 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. Skills. To get a certificate, two problems have to be solved within 90 minutes. ; 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. 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. 175. 1 Star - Bronze. 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. hackerrank hackerrank-python hackerrank-solutions hackerrank-sql. We shall use recursive sql to solve the given problem. The following is a list of possible problems per certificate. 74%. Basic Join. Nov 4, 2023 · That’s all I can share to solve some problems in SQL HackerRank (Difficulaty Easy). Weather Observation Station 20. : number of characters in the name). 4 Star - Silver. SQL Solutions: A collection of SQL queries that solve various database-related problems on HackerRank. npngkrghrlcrygoctekcibjdxxprhnnysltxwzywefbgxfmwfl