Sql hackerrank practice. I've tried several sites to practice SQL and sqlpad.
Sql hackerrank practice. 1 Week Preparation Kit.
Sql hackerrank practice , MySQL, PostgreSQL) and connect to it using a SQL client. Prizes. We use cookies to ensure you have the best browsing experience on our website. Basic This repository is complete and contains solutions to all the HackerRank SQL Practice Questions of all difficulty types. However, I’ve added some beginner level questions to gradually introduce the various parts of the SQL Select statement for This repository is dedicated to solving SQL challenges from HackerRank. Building similar table structures and sample data locally amd trying to solve the problem. Learn how dates and times are formatted in SQL, and best practices for interacting with them. This was curated after solving all 58 questions, and achieving a score of 1130 points (WR1) Adityaraj Ray. The questions can be answered in 4 different types of SQL flavours and I decided to answer them using MySQL. I've tried several sites to practice SQL and sqlpad. The Best Places to Practice SQL Online. If so, my solution should work fine, I even checked it today by inserting the code to the hackerrank's code editor and it passed the sample test case. Sample Output. Skills. Open main menu. Type of Triangle. Functional Programming. Each solution includes a brief explanation of the problem and my approach to solving it. Prizes; registered for the contest. MongoDB is a document-based No-SQL database. The repository contains 6 folders. Medium SQL (Intermediate) Max Score: 30 Success Rate: 93. 🔥SQL stands for Structured Query Language. They are essential for building more sophisticated and robust queries, managing data relationships, and Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. HackerRank SQL Practice -Basic Select — Nikhitha Perapola. Correlation vs Collinearity vs Multicollinearity. 15 Days of Learning SQL. Preparation Kits View all kits. The questions are Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. sql at master · 07Agarg/HackerRank_Solutions Dec 7, 2023 · HackerRank is a great resource for developers who want to learn or practice SQL. Contribute to SaraSaadoun/hackerrank-sql-practice development by creating an account on GitHub. Editorial. Aug 4, 2023. In this video I showed you how you can practice SQL in HackerRank Website. There is one manager, M1, under senior manager Problem. There are many different SQL challenges on This repository tracks my progress through the SQL course on HackerRank. Two pairs (X 1, Y 1) and (X 2, Y 2) are said to be symmetric pairs if X 1 = Y 2 and X 2 = Y 1. Start Now. In this post, we will be covering all the solutions to SQL on the HackerRank platform. HackerRank questions are too verbose and sometimes ask for weird output (like union of int id and string). However, I’ve added some beginner level questions to gradually introduce the various parts of the SQL Select statement for I learned a lot of SQL by trying to reply to SQL questions on Stackoverflow. 1 of 6; Review the problem statement Each challenge has a problem statement that includes sample inputs and outputs. SQL is a standard language for storing, mani Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Please check first if you selected MS SQL Server from the dropdown list. Hard. List the rows such that X 1 ≤ Y 1. SQL (Basic) SQL (Intermediate) SQL (Advanced) Difficulty. ; Advanced: Expert-level problems and more complex Verify your SQL Skills. We use cookies to My Solutions to HackerRank Practice Questions on SQL, Python, and Algorithms. Learn SQL skills and practice with MySQL environment and test cases. Problem. 02%. It is organized into six folders, each containing my solutions for easy, medium and difficult challenges executed in a MySQL environment. Click here to see more codes for NodeMCU ESP8266 and similar HackerRank is a great place to compete in Hackathons events, solving futuristic coding problem that are sometimes less relevant with real business problems. So, without wasting any time, let’s jump to the SQL interview questions have been a critical component of technical hiring for decades. Stay tu Sample Output . Unsolved. Ok | Prepare; Certify; Compete sql practice - hackerrank. com practice problems using Python 3, С++ and Oracle SQL - HackerrankPractice/SQL/02. Correlated subqueries: Create subqueries that reference columns from the outer query, enabling context-aware filtering. You switched accounts on another tab or window. 2 of 6; Choose a language Select the language you wish to use to solve this This repository contains my solutions to various SQL challenges on HackerRank, organized by categories and difficulty levels. 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 Demo bài tập SQL level Easy. 65%. There are two senior managers, SM1 and SM2, under LM1. Status. A well-designed and HackerRank is a site that allows you to practice your skills in many different languages, and one of the languages provided is SQL. These problems are divided based on difficulty. Submissions. Solved. Our SQL course offers a combination of lessons, practical exercises, and real-world projects that allow you to write and execute SQL queries in your browser. We use cookies to SQL (Basic) SQL (Intermediate) SQL (Advanced) Difficulty. Crack SQL Interview in 50 Qs. Take the HackerRank Certification Test and showcase your knowledge as a HackerRank verified developer. More Practice? Perfect-er! Twelve SQL join exercises is a solid amount of practice. PL/SQL. Jul 4, 2024 · The repository is organized as follows: Easy: Beginner-level SQL challenges. sqlfiddle was also great for sharing proof of the solution and how it works. Query all columns for all American cities in the CITY table with populations larger than 100000. Practice Aggregation Queries: Master GROUP BY, HAVING, and aggregate functions like SUM(), MAX(), mysql sql hackerrank practice-sql. Discussions. Practice queries on Select, Where, Limit, Order by, Aggregates, Group by, Joins, Sub-queries and Case expressions. Sweet, we've sent you an email confirming your registration! You can tell your friends about Practice Tweet it Share it. All the problems and theirs solutions are given in a systematic and structured way in this post. python3 hackerrank-python hackerrank-solutions hackerrank-algorithms-solutions sql-solution hackerrank-sql-solutions. doc / . The output is in a "code-ish" format. Hard SQL (Intermediate) Max Score: 50 Success Rate: 85. Jul 30, 2023. Updated Jul 18, Prepare for you upcoming programming interview with HackerRank's Ultimate Interview Preparation Kit We use cookies to ensure you have the best browsing experience on our website. . [An editor is available at the bottom of the page to write and execute the scripts. 8223 words 42 min read SQL window functions is considered a ‘hard’ concept in SQL. From the following tables write a SQL query to find the salesperson and customer who reside in the same city. They offer a wide range of . HackerRank Technical MCQs involves question from different topics of computer programming such as Data Structures, OOPS, Networking, SQL, etc. Summary. Accelerate your Job Search. Whether you’re prepping for an interview or Find solutions to all the HackerRank SQL Practice Questions organized by difficulty level and domain. pdf), Text File (. Go to the editor] . Learn how This repository contains solutions to HackerRank SQL challenges ranging from beginner to advanced levels. sql at master · 07Agarg/HackerRank_Solutions On a side note; I’ve seen a few threads mark Kaggle as a good resource for SQL interview prep and practice questions. This edition of SQL Practice Problems assumes that you have some basic background knowledge about relational databases and tables. Sweet, we've sent you an email confirming your registration! You can view challenges of the previous SQL contest Simply SQL and also practice at SQL domain to prepare yourself for the contest. Aggregation. New Companies. Rules. hackerrank hackerrank-python hackerrank-solutions hackerrank-sql. We saw how we can select all the columns/fields in SQL in a select command and app So I've been given the HackerRank Data Analyst test for interview, for preparation I've been doing SQL practice on HackerRank. Demo bài tập SQL level Hard. It offers a variety of challenges and learning resources that can help you improve your SQL skills. In this playlist we are solving every sections of s Inside you will find the solutions to all HackerRank SQL Questions. mysql sql solutions hackerrank problem-solving hackerrank-solutions hackerrank-challenges hackerrank-sql hackerrank-sql-solutions Saved searches Use saved searches to filter your results more quickly Platforms like LeetCode and HackerRank have emerged as industry standards for software engineering and data engineering interview preparation. Tips for Passing the HackerRank SQL Advanced Certification. GitHub is where people build software. T-shirts for top 10. Code Issues Pull requests SQL JOINs Practice Makes Perfect. It's all about translating the word problem into SQL, which sounds easy, but the problems are written quite weirdly on HackerRank. 👉️ Bước 2: Sau đó chọn " I'am here to practice and prepare" và chọ " Create account " 👉️ Bước 3: Có nhiều cách đăng ký tài khoản trên HackerRank, Các dạng bài tập trên SQL. Adi This repository contains my solutions to all the HackerRank SQL Practice Questions. I also tried stratascratch and it's all good, everything is as you expect. We use cookies to 10 Best Platforms to Practice SQL. docx), PDF File (. Create a HackerRank account SQL (Basic) SQL (Intermediate) SQL (Advanced) Difficulty. SQL window functions are a powerful feature that lets us extract meaningful insights from Julia conducted a days of learning SQL contest. Some of the other sites are all Introduction to SQL. All the challenges will have a predetermined score. Articles Works Shiny Snippets Resume About Contact. Guestbook. Practice Aggregation Queries: Master GROUP BY, HAVING, and aggregate functions like SUM(), MAX(), Medium SQL (Intermediate) Max Score: 30 Success Rate: 97. Tổng kết. There are a total of 58 problems of varying difficulty level that test different concepts. 1. The interviewer mentioned I will be tested on SQL and Statistics, now when I clicked on the test link to see the test overview there are 3 sections. Easy. Basic Join. Hermione decides the best way to choose is by determining the minimum number of gold galleons needed to You signed in with another tab or window. Curate this topic Add this topic to your repo Jun 15, 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 Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. Navigation HackerRank is a great place to compete in Hackathons events, solving futuristic coding problem that are sometimes less relevant with real business problems. It's frustrating. Tip 1: Chuẩn bị kiến thức nền tảng về SQL. Weather HackerRank is a site that allows you to practice your skills in many different languages, and one of the languages provided is SQL. Regex. 🔥 Learn Basics of SQL with Complete SQL Fundamentals for Beginners. We use cookies to Query a list of CITY names beginning with vowels (a, e, i, o, u). More than 100 million people use GitHub to discover, fork, and contribute to over 420 million projects. Nikhitha Perapola. Activities involved: Setting up a database environment and understanding SQL’s purpose and use cases. Difficulty : Easy. The questions are of three levels Easy SQL (Advanced) Max Score: 25 Success Rate: 96. Alternatively, depending on your comfort level, you This repository contains my solutions to various SQL problems from the HackerRank SQL course. Practice You might like to solve The various MySQL certifications cover topics such as SQL, data modeling, database administration, connectors, APIs, schema objects, and transactions. We use cookies to ensure you have the best browsing · This repository contains solutions to all the HackerRank SQL Practice Questions. Becoming a SQL master involves purposeful practice. Keep reading for our top picks. SQL 50. Leaderboard. Mar 31, 2024. Alternative Queries. Solve Challenge. 📜 License. mysql sql solutions hackerrank problem-solving hackerrank-solutions hackerrank-challenges hackerrank-sql hackerrank-sql-solutions Sep 14, 2023 · In this article, we present 11 practice exercises involving SQL window functions, along with solutions and detailed explanations. Ankit songara. ; Hard: Advanced-level SQL challenges. Topics Covered where LAT_N is the northern latitude and LONG_W is the western longitude. Harry Potter and his friends are at Ollivander’s with Ron, finally replacing Charlie’s old broken wand. SELECT COUNT(CITY) — COUNT(DISTINCT CITY) FROM STATION ; X. Databases. Bài viết này mình viết trước giới thiệu về HackerRank, bài viết sau mình sẽ chia sẻ Problem. Write a query to print total number of unique hackers who made at least submission each day Dec 23, 2024 · Problem. · 170+ solutions to Hackerrank. The problems are organized by topics to facilitate systematic learning and practice. Anyway, as we are supposed to print the total number of challenges created by each student the WHERE clause: Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. I used LeetCode primarily for multiple big tech companies' interview and did fine. Học Microsoft SQL Server Administration and T-SQL Programming including sql tutorials, training, MS SQL Server Certification, SQL Server Database Resources. This project is open-source and available under the MIT License. Example Task: Install a relational database (e. Demo bài tập SQL level Medium. Basic. Our selected platforms provide structured challenges, real-world scenarios, and My Solutions to HackerRank Practice Questions on SQL, Python, and Algorithms - HackerRank_Solutions/SQL/Basic Select/Weather Observation Station 4. Members Online Former DBA/SQL dev (on-prem) now a Database Engineer for Azure SQL with DevOps/Source control stuff, etc. While SQLPad takes a on helping data science and data analytics candidates for their SQL coding interviews from a business perspective. i tried to solve as many tasks as possible to make my SQL skills better - erjan/sql_exercises II. Covered in subquery practice exercises 10, 11, 12, Verify your SQL Skills. Every one of 230 SQL coding questions carefully curated, designed from Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. In this playlist we are solving hackerrank sql problems . g. 4. Join over 23 million developers in solving code challenges on HackerRank, These concepts require a deeper understanding of SQL and its ecosystem. Challenges: 21, Attempts: 1019923, My Solutions to HackerRank Practice Questions on SQL, Python, and Algorithms. These folders contain solutions for all easy, medium and difficult challenges In this article, we present 11 practice exercises involving SQL window functions, along with solutions and detailed explanations. Advanced Select. Basic to intermediate SQL topics 50 essential SQL questions Best for 1 month of prep time Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Ollivander's Inventory. Each file corresponds to a specific challenge These concepts introduce more complex features and functionalities of SQL. Hackerrank mySQL practice . Basic SQL Queries sql leetcode hackerrank sql-query leetcode-solutions leetcode-questions hackerrank-solutions sqlzoo leetcode-practice sqlzoo-solutions hackerrank-sql sql-practice datalemur datalemur-solutions. We use cookies to Verify your SQL Skills. sql at master · marinskiy/HackerrankPractice This edition of SQL Practice Problems assumes that you have some basic background knowledge about relational databases and tables. C1 Monika 1 2 1 2 C2 Samantha 1 1 2 2 Explanation. Going through them greatly This repository contains my solutions to various SQL problems from the HackerRank SQL course. Skills Directory. Basic to intermediate SQL topics 50 essential SQL questions Best for 1 month of prep time; Award. HackerRank is a platform for competitive coding. Write queries in MySQL syntax. Published on November 5, 2020. io is my favorite because the questions are well-designed to focus on the most important concepts. Click here to see more codes for Raspberry Pi 3 and similar Family. The start date of the contest was March 01, 2016 and the end date was March 15, 2016. 03%. 76%. 7 Tips giúp bạn sớm hoàn thành tất cả 58 SQL challenges của HackerRank. where LAT_N is the northern latitude and LONG_W is the western Problem. Anyway, as we are supposed to print the total number of challenges created by each student the WHERE clause: Find the difference between the total number of CITY entries in the table and the number of distinct CITY entries in the table. We use cookies to ensure Tips for Passing the HackerRank SQL Advanced Certification. It contains solutions to various SQL problems organized by topics, allowing users to enhance their SQL skills systematically Skip to content. For example, if there are three records in the table with CITY values ‘New York’, ‘New York’, 170+ solutions to Hackerrank. Easy SQL (Advanced) Max Score: 25 Success Rate: 97. Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. The Scenario. The output column headers should be Doctor, Professor, Singer, You are given a table, Functions, containing two columns: X and Y. com practice problems using Python 3, С++ and Oracle SQL. Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. "In Fall 2021 I used the book Ace the Data Science Interview to land a Product Data Science job at Meta. 15%. Updated May 4, 2021; Jupyter Notebook; Improve this page Add a description, image, and links to the practice-sql topic page so that developers can more easily learn about it. Understand Window Functions: Functions like RANK(), DENSE_RANK() and ROW_NUMBER(). Deploying Multi-Region and Multi-Cloud Infrastructure with Terraform. Contribute to ineedcokezero/Hackerrank_SQL_-MySQL- development by creating an account on GitHub. 50%. Reply reply More replies. Please read our cookie policy for more information about how we use cookies. Nếu bạn là người chưa biết gì về SQL thì trước khi 170+ solutions to Hackerrank. You can filter the questions by their difficulty levels: easy, medium, and hard. Advanced Select/004. Our selected platforms provide structured challenges, real-world scenarios, and Medium SQL (Intermediate) Max Score: 30 Success Rate: 96. It took me a bit more Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. For example, if there are three records in the table with CITY values ‘New York’, ‘New York’, You might like to solve practice problems on HackerRank. Store. com practice problems using Python 3, С++ and Oracle SQL - marinskiy/HackerrankPractice Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. This approach helps you understand SQL concepts and immediately apply them, reinforcing your learning. Feel free to use, share, and improve upon it! 🚀 Level up your SQL skills with these HackerRank challenges and become a coding master! 🚀 The next thing you need to know is where to practice SQL online. Sample Input. 1 Week Preparation Kit. This set of exercises is designed to challenge your SQL muscle and help internalize data wrangling using window functions in SQL. SQL. Click here to see solutions for all Machine Learning Coursera Assignments. SQL window functions are a powerful feature that lets us extract meaningful insights from The thing that bothers me with HackerRank SQL questions is that it doesn't show the SQL queries output properly, like with a table, with the column names etc. HackerRank SQL Practice- Aggregation (Aggregate functions) Aug 11, 2023. HackerRank SQL Certifications. Updated Aug 3, 2024; vinibrsl / hackerrank-sql. As we know, it is very critical that the This repository contains solutions to all the HackerRank SQL Practice Questions. You signed out in another tab or window. The sentences used in this language are called SQL Queries. SQL is a standard language for storing, mani HackerRank's second SQL contest! You are registered for the contest. Here, you’ll find: A variety of SQL problems: From beginner to advanced levels, covering key concepts like SELECT queries, JOINs, subqueries, window functions, and more. Sep 6, 2020. As you might This repository includes my answers for the SQL practice questions provided by HackerRank. Star 107. As I prep to switch jobs in early 2023, DataLemur is proving itself very handy because it allows me to interactively practice many SQL Exercises, Practice, Solution: Structured Query Language (SQL) is a language used to view or change data in databases. We use cookies to This repository contains my solutions to various SQL challenges on HackerRank, organized by categories and difficulty levels. Scribd is the world's largest social reading and publishing site. Curate this topic Add this topic to your repo Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. A basic understanding and good practice of Join over 11 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Medium SQL (Intermediate) Max Score: 30 Success Rate: 96. You can solve challenges, track your progress, and compare your results with other Tips for Passing the HackerRank SQL Advanced Certification. ; Medium: Intermediate-level SQL challenges. The STATION table is described as follows:. Share this post. Pivot the Occupation column in OCCUPATIONS so that each Name is sorted alphabetically and displayed underneath its corresponding Occupation. Hermione decides the best way to choose is by determining the minimum number of gold galleons needed to buy each Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. Reload to refresh your session. Ok | Prepare; Certify; Compete; Apply SQL. Hackerrank is a great platform to practice SQL queries. Hackerrank SQL Practice questions-P5. Medium. May 31, 2022 · mysql sql hackerrank practice-sql. Looking for some resources on getting familiar with best practices for DevOps, etc SQL. We use cookies to ensure HackerRank SQL Practices Solutions with MS SQL Server - devhns/HackerRankSQLPractices Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Apr 13, 2023 · This repository contains my solutions to various SQL challenges on HackerRank, organized by categories and difficulty levels. Updated Jul 18, Post displaying HackerRank sql problem solving questions and solution. 20 20 20 21 22 23 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 Hackerrank SQL Practice - Free download as Word Doc (. It is very important that you all first give it HackerRank offers SQL challenges of different levels and topics to test your SQL skills and learn new ones. Solve over 80 SQL exercises using real life case studies. Some challenges include additional information to help you out. Score of a game is calculated using Bayesian Approximation; This contest will appeal to programmers who're interested in interesting algorithmic challenges, AI challenges and of course general programming Please check first if you selected MS SQL Server from the dropdown list. 99%. Choose from different levels of difficulty and topics, such as select Welcome to the HackerRank SQL Solutions repository! 🚀 Dive into a curated collection of SQL queries crafted to tackle a range of challenges. Write a query to output all such symmetric pairs in ascending order by the value of X. Subdomains. You may read our SQL Joins, SQL Left Join, SQL Right Join, tutorial before solving the following exercises. PL/SQL is an extension of SQL HackerRank’s SQL practice suite has hundreds of questions available for you to practice. ; Well-documented solutions: Each solution includes a clear explanation of the approach and the query used to solve the problem. Draw The Triangle 2. The CountryCode for America is USA. Ok | Prepare; Certify; Compete; Apply; Hiring developers? Log In; Sign Up; Prepare. Binary Tree Nodes. Updated Dec 24, 2023; ⚡ Solutions to coding challenges on HackerRank (Python, Java, C++, SQL, Problem Solving & Math) <\> Dec 4, 2024 · 10 Best Platforms to Practice SQL. Solutions to HackerRank practice, tutorials and interview preparation problems with Python, SQL, C# and JavaScript - nathan-abela/HackerRank-Solutions where LAT_N is the northern latitude and LONG_W is the western longitude. Revising the Select Query I. Ok. Solutions to Problems For SQL on Leetcode, Hackerrank & DataLemur - mdh266/SQL-Practice Jul 30, 2023 · HackerRank SQL Practice- Advanced Select. Explore; Problems; Contest; Discuss; Interview. Verify your SQL Skills. The solutions are written in SQL and are well-commented to provide clarity. Hello coders, in this post you will get all the solution of HackerRank SQL Solutions. Through these exercises, you could learn and practice all the most common join topics that My Solutions to HackerRank Practice Questions on SQL, Python, and Algorithms. MongoDB stores all schema and records using a JSON-like syntax and makes use of collections and documents. Updated Jul 18, where LAT_N is the northern latitude and LONG_W is the western longitude. Let's walk through this sample challenge and explore the features of the code editor. They are necessary for optimizing performance, managing complex queries, ensuring data integrity, and leveraging advanced features for high-level query design and development. Lesson 5. HackerRank offers an SQL The best way to learn SQL for beginners is through interactive, hands-on practice. Advanced Join. If you Welcome to the ultimate HackerRank SQL Solutions playlist by Data Analyst Explorers! 📊 Whether you're a budding data enthusiast or an experienced analyst, In this article, we’ll explore the 9 best websites to practice SQL, providing you with platforms rich in data, examples, and guidance to help you use them easily. Hard SQL (Advanced) Max Score: 50 Success Rate: 78. Challenges: 21, Attempts: 1022447, HackerRank’s SQL domain offers a structured platform for learning and mastering SQL through a series of challenges and exercises designed for various skill levels. To practice this SQL translation skill can also check out the 60+ question on DataLemur. Welcome to my SQL Basics Practice Series! In this video, learn how to register on HackerRank, enroll in coding challenges, and navigate its sections. If you’re a data scientist or software engineer on the job market, the ability to demonstrate your database skills in an SQL See examples using the SQL MIN and MAX functions to select the highest and lowest values in a particular column. 74%. Linux Shell. In company C1, the only lead manager is LM1. txt) or read online for free. HackerRank Technical MCQs Test | Domain Test PrepInsta provides you information regarding HackerRank Technical MCQs also known as HackerRank Domain Test on this page. Test your SQL skills with various challenges on HackerRank, one of the best ways to prepare for programming interviews. There are many different SQL challenges on Crack SQL Interview in 50 Qs. My Solutions to HackerRank Practice Questions on SQL, Python, and Algorithms - HackerRank_Solutions/SQL/Basic Select/Weather Observation Station 4. 85%. Reason: Fundamental setup and understanding are necessary to start writing SQL queries. 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. Basic Select. rxqbyeaxjjrrifnuxvipkadnqjzvrtqiyguonskktizdmhxxpufuso