Hackerrank sql practice problems. Easy SQL (Advanced) Max Score: 25 Success Rate: 96.

Hackerrank sql practice problems HackerRank's extensive library of SQL challenges is a valuable resource for those aiming to excel in SQL. Sample Input 1. HackerRank SQL Question 15. They are essential for building more sophisticated and robust queries, managing data relationships, and optimizing query performance. Scarlet 8 78. When you first start, the best way is to use the filters HackerRank SQL Practice -Basic Select — Nikhitha Perapola. Interviews can be hands-on, with problems to solve on CoderPad, HackerRank, or even a whiteboard session. Easy. python3 hackerrank-python hackerrank-solutions hackerrank-algorithms-solutions sql Challenges: The challenge_id is the id of the challenge, and hacker_id is the id of the student who created the challenge. 1 Revising the Select Query I SQL 2 Revising the Select Query II SQL Include most of SQL practice problems and corresponding solutions on HackerRank - pyusbos/HackerRank-Practice-SQL Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. The problems are organized by topics to facilitate systematic learning and practice. Articles Works Shiny Snippets Resume About Contact. The case (uppercase or Welcome to the HackerRank SQL Solutions repository! 🚀 Dive into a curated collection of SQL queries crafted to tackle a range of challenges. Prizes. 2 of 6; Choose a language Select the language you wish to use to solve this This collection provides solutions to the HackerRank SQL Certification Test problems. View Schema patients. Contribute to amymartika/SQL-practice development by creating an account on GitHub. : number of characters in the name). Whether we are beginners or experienced professionals, practicing SQL exercises is important for improving Post displaying HackerRank sql problem solving questions and solution. Damely Tineo. Sign up for Practice_SQL now. Edabit is great for beginners looking to practice their coding skills daily by solving bite-sized challenges. Sample Input 0. The contest creator holds HackerRank harmless from and against any and all claims, losses, damages, costs, awards, settlements, orders, or fines. Unsolved. 2 of 6; Choose a language Select the language you wish to use to solve this realNameHiddenRevising the Select Query I Hackerrank SQL Solution*****If You want Query Click Here: https://realnamehidde Let's walk through this sample challenge and explore the features of the code editor. HackerRank. Basic Join. Retrieving Data Using SELECT Queries. Stars are welcome · Report a bug · Request a feature. Weather Observation Station 18. Take a look, play and have fun with this. It’s also a critical first step for almost Let's walk through this sample challenge and explore the features of the code editor. The problem description can be found as comments at the top of each file. What is the best platform to practice SQL? A. sql: Basic Select: Julia conducted a days of learning SQL contest. SQL (Structured Query Language) is a powerful tool used for managing and manipulating relational databases. You can practice both SQL and SQL Exercises, Practice, Solution: Structured Query Language (SQL) is a language used to view or change data in databases. This Github repo showcases my SQL case studies, demonstrating proficiency in solving diverse business problems. Code Issues Pull requests The solutions of all SQL hackerrank challenges using MySQL environment. Pricing: Let's walk through this sample challenge and explore the features of the code editor. It's all about translating the word problem into SQL, which sounds easy, but the problems are written quite weirdly on HackerRank. Solve over 80 SQL exercises using real life case studies. [An editor is available at the bottom of the page to write and execute the scripts. This makes practicing window functions quite difficult. There are many different SQL challenges on the site, and each of them has a sample data set, Correlated subqueries: Create subqueries that reference columns from the outer query, enabling context-aware filtering. Effective solutions to hackerrank. Updated Jan 9, 2025; ahmedali20 / HackerRankSolutions. This repository contains solutions to all the HackerRank SQL Practice Questions. HackerRank, SQL, All, Solutions, Basic Select, Advanced Select, Aggregation, Basic Join, Advanced Join, Alternative Queries, APDaga, DumpBox, answer, I have tried to provide the complete solution with possible Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. 76%. SQL 50. With practice, understanding common SQL challenges, and mastering fundamental concepts, you’ll be well-prepared to tackle the certification exam. Status. You can find a more detailed explanation of multiple joins here. sql files with the respective solution. SQLZoo. where LAT_N is the northern latitude and LONG_W is the western longitude. Top Competitors. ; Advanced: Expert-level problems and more complex queries. Challenges Table . 2 of 6; Choose a language Select the language you wish to use to solve this You may read our SQL Joins, SQL Left Join, SQL Right Join, tutorial before solving the following exercises. SQL Database. Code Issues Pull requests These are practice problems from HackerRank involving different components of writing SQL queries. The CountryCode for America is USA. Sample Output 0. To master this powerful language, consistent practice is crucial. It focuses solely on offering correct answers for SQL queries, joins, and aggregations, helping users pass the certification efficiently. 5 Powerful Solutions to Common HackerRank SQL Certification Problems 1. ; Each folder contains . 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. SQL (Intermediate) SQL (Advanced) Difficulty. Great for. Mode Analytics SQL Tutorial: Practical HackerRank is a site that allows you to practice your skills in many different languages, and one of the languages provided is SQL. COM. - kumod007/All-HackerRank-SQL-Challenges-Solutions The repository is organized as follows: Easy: Beginner-level SQL challenges. The solutions of all the Hackerrank SQL challenges for all easy, medium and hard challenges executed on Oracle environment. HackerRank SQL Problems and Solutions — 1. The above problems are generated by HackerRank, but the solutions are provided by NYANDER. select CITY, STATE from Join over 11 million developers in solving code challenges on HackerRank, as well as for procurement and distribution of all prizes. Easy SQL (Basic) Max Score: 10 Success Rate: 95. This repository is dedicated to practicing SQL queries using HackerRank problems. NULL 7 63. Topics Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Solutions to Problems For SQL on Leetcode, Hackerrank & DataLemur - mdh266/SQL-Practice Medium SQL (Intermediate) Max Score: 30 Success Rate: 97. In this playlist we are solving every sections of s sql hackerrank hackerrank-challenges hackerrank-sql practice-sql hackerrank-solutions-sql. - MayankOps/HackerRank-SQL-Certification-Test-Solutions Medium SQL (Intermediate) Max Score: 20 Success Rate: 96. Some of the other sites are all 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. Crack SQL Interview in 50 Qs. Query all columns for every row in a table. 95%. There are N problems numbered 1. This repository contains my solutions to all the HackerRank SQL Practice Questions. All the challenges on HackerRank are here, we will see HackerRank SQL problems with solutions, let's dive into This article will help you in revising basic SQL queries and Sort your results by the total number of challenges in descending order. You are given three tables: Students, Friends and Packages. ; Medium: Intermediate-level SQL challenges. HackerRank offers a series of SQL challenges and competitions that are suitable for intermediate and advanced learners. Reply reply More replies. Skills Directory. 21283 Angela 6 88255 Patrick 5 96196 Lisa 1. If there is more than one SQL practice problems found around the web. Before You Launch. Subquery in SELECT clause: Include a Why this video is 7. 12299 Rose 6 34856 Angela 6 79345 Frank 4 Crack SQL Interview in 50 Qs. This repository contains my solutions to various SQL problems from the HackerRank SQL course. Join over 11 million developers in solving code challenges on HackerRank, as well as for procurement and distribution of all prizes. Write a query to print the hacker_id, name, and the total number of challenges created by each student. It took me a bit more than two weeks (on and off between work, 170+ solutions to Hackerrank. HackerRank SQL Problems and Solutions —2. 65%. Solution:. Aggregation. The start date of the contest was March 01, 2016 and the end date was March 15, 2016. Simply SQL - The Sequel HackerRank's second SQL contest! You can view challenges of the previous SQL contest Simply SQL and also practice at SQL domain to prepare yourself for the contest. 5 hours long? Because Im solving ALL of the SQL Problems on Hackerrank in this video. The sentences used in this language are called SQL Queries. Problem 1. sql hakerrank-solutions hakerrank-problem-solving. . HackerRank is great for intermediate-to-advanced programmers who have already picked up the basics of a language and are ready to solve more complicated problems. 4. Ok. Aug 4, 2023. The HackerRank Question is here. 💪 Exercices. Solutions: It also offers solutions to its problems. Whether you’re prepping for an interview or 45. Drill down practice questions with DataInterview SQL Pad. Each file corresponds to a specific challenge Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. New Companies. These problems are divided based on difficulty. N which you need to complete. I've tried several sites to practice SQL and sqlpad. Hackers Table: Challenges Table: Sample Output 1. Solution to HackerRank SQL Practice Questions. They are necessary for optimizing performance, managing complex queries, ensuring data integrity, and leveraging advanced features for The STATION table:. The AS keyword causes errors, so follow this convention: "Select t. Binary Tree Nodes. Basic to intermediate SQL topics 50 essential SQL questions Best for 1 month of prep time; Award. e. Students contains two columns: ID and Name. HackerRank is one of SQL (Intermediate) SQL (Advanced) Difficulty. presents. Contribution. Start hiring at the pace of innovation! Build coding questions using our library of dev-friendly content that challenges them to solve the problems These concepts introduce more complex features and functionalities of SQL. HackerRank: Wide range of SQL problems. Let’s dive into what SQL is, basic skills, career opportunities, and websites where you can practice SQL. Solve Challenge. Challenges | Medium | HackerRank. HackerRank SQL Solutions. Write queries in MySQL syntax. Julia asked her students to create some coding challenges. If more than one student created the same number of challenges, then sort the result by hacker_id. Write a query to output the names of those students whose best friends got offered a higher HackerRank is a valuable platform for learning SQL as it offers practical challenges, fosters problem-solving skills, provides learning resources, and encourages community interaction. SQLZoo is a free online tutorial website that is beginner-friendly and covers the basics of SQL. LeetCode: Extensive SQL challenges. Challenges are organised around core concepts commonly tested during Interviews. 15%. My Solutions to HackerRank Practice Questions on SQL, Python, and Algorithms. Keep practicing SQL challenges on HackerRank to improve your database query skills! You signed in with another tab or window. The CITY table is described as follows: Practice queries on Select, Where, Limit, Order by, Aggregates, Group by, Joins, Sub-queries and Case expressions. You've arranged the problems in increasing difficulty order, and the i th problem has estimated difficulty level i. Learn about basic MySQL and My solutions to various HackerRank SQL problems using MySQL Topics. Amber's conglomerate corporation just acquired some new companies. It allows developers and data professionals to practice and refine their SQL skills through hands-on problems. Star 2. 03%. Learn and improve your SQL skills. You have also assigned a rating vi to each problem. Sep 15, 2024. Sort your results by the total number of challenges in descending order. Code practice, and challenges of the HackerRank platform. It covers topics such as basic SQL queries, joins, aggregations, and window functions. Easy SQL (Advanced) Max Score: 25 Success Rate: 96. Updated Dec 24, 2023; Python; CAG9 / SQL-Practice-Problems. mysql HackerRank is a competitive programming platform that offers a variety of challenges and exercises across different domains, including SQL. Order your output by ascending company_code. Learn about basic MySQL and My solutions to various HackerRank SQL problems using MySQL. Complete the study plan to win the badge! Related. To practice this SQL translation skill can also check out the 60+ question on DataLemur. I welcome contributions from the community! If you have a better solution or an improvement, feel free to submit a pull Hello, welcome to the repository where I will practice SQL. Each of the companies follows this hierarchy: Given the table schemas below, write a query to print the company_code, founder name, total number of lead managers, total number of senior managers, total number of managers, and total number of employees. Advanced Select. These solutions can be used as a reference for other learners or as a way to practice and improve SQL skills. We use cookies to ensure you have the best This repository contains solutions to Hackerrank practice problems with SQL. In this repo you will find the questions I encounter on HackerRank and the solution I used to solve them. Nerves can peak during the programming test, and even experienced developers might blank Hackerrank contains 58 SQL based problems for interview practice, as i go through these will keep a solution bank here categorised into the three difficulties (basic, intermediate, advanced) SQL window functions is considered a _'hard'_ concept in SQL. 2 of 6; Choose a language Select the language you wish to use to solve this SQL (Intermediate) SQL (Advanced) Difficulty. The solutions are written in SQL and are well-commented to provide clarity. Contribute to abphilip-work/Hackerrank-SQL development by creating an account on GitHub. Solve SQL query questions using a practice database. 170+ solutions to Hackerrank. 83%. HackerRank SQL Practice- Advanced Select. Write a query to print total number of unique hackers who made at least submission each day (starting on the first day of the contest), and find the hacker_id and name of the hacker who made maximum number of submissions each day. The CITY table is described as follows: HackerRank is a widely-used platform for practicing coding problems, preparing for technical interviews, and improving algorithmic skills. Difficulty : Easy. io is my favorite because the questions are well-designed to focus on the most important concepts. Problems with similar vi values are similar in nature. The platform covers a diverse range of problems that span various difficulty levels and domains, making it an excellent resource for both beginners and experienced programmers. Friends contains two columns: ID and Friend_ID (ID of the ONLY best friend). mysql practice solutions hackerrank problem-solving hackerrank-solutions hackerrank-sql hackerrank-sql-solutions Resources. Please read our cookie policy for more information about how we use cookies. The challenges cover a wide range of SQL topics, and you can earn badges to Practice SQL querys with an online terminal. This repository contains my SQL solutions to HackerRank challenges, organized by difficulty level: Easy, Medium, and Hard. REST API. NULL 7 68. Advanced Select/004. Prepare to showcase your understanding of SQL concepts, data manipulation, and writing optimized queries. Packages contains two columns: ID and Salary (offered salary in $ thousands per month). Ok | Prepare; Certify; Compete HackerRank: HackerRank offers SQL challenges and competitions to practice SQL skills. I also tried stratascratch and it's all good, everything is as you expect. 68%. In this playlist we are solving hackerrank sql problems . Revising the Select Query I. CodeRankGPT helps you solve HackerRank coding problems during your coding interview. Reload to refresh your session. Updated Feb 19, 2021; Tip #1: Start Easy, and Gently Work Your Way Up. Run . The solutions of all SQL hackerrank challenges using MySQL environment. Skills. Store. SQL Window Functions Query all columns for all American cities in the CITY table with populations larger than 100000. Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Contact. Preparation Kits View all kits. Prepare for you upcoming programming interview with HackerRank's Ultimate Interview Preparation Kit. Type of Triangle. 2 of 6; Choose a language Select the language you wish to use to solve this Questions Diversity: The challenges range from basic to advanced SQL tasks, including subdomains like Basic Select, Advanced Select, Aggregation, Basic Join, Advanced Join, and Alternative Queries. Revising the Select Query I – HackerRank Solution It offers over 9,000 problems and questions. 2 of 6; Choose a language Select the language you wish to use to solve this There are many websites and portals to practice SQL for free or for a small fee. Linux Shell. sql at master · marinskiy/HackerrankPractice You are given a table, Projects, containing three columns: Task_ID, Start_Date and End_Date. Let's walk through this sample challenge and explore the features of the code editor. Code Issues Pull requests mysql sql In this article, we present 11 practice exercises involving SQL window functions, along with solutions and detailed explanations. Sample Input. Settings. 1 Week Preparation Kit. On each day, you will choose a subset of the problems and solve them. If more than one student created the same number of challenges and the count is less than the maximum number of challenges created, then exclude those students from the result. You switched accounts on another tab or window. Readme Activity. 15 Days of Learning SQL. Draw The Triangle 2. Sort your results by Activities involved: Writing advanced joins (CROSS JOIN, SELF JOIN) and set operations (UNION, INTERSECT, EXCEPT). ” I used the MySQL option on the platform to solve each of the challenges. Discussions. Sample Output 1 170+ solutions to Hackerrank. Challenges. You signed out in another tab or window. T Welcome to my GitHub repository dedicated to solving HackerRank problems using Python and SQL! 🚀 Practice and Improve: Use these solutions as a reference to practice and improve your own coding skills. Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. 1 of 6; Review the problem statement Each challenge has a problem statement that includes sample inputs and outputs. Each solution is designed to demonstrate various SQL techniques and best practices, with clear comments to enhance understanding. Field From table1 AS t". Covered in subquery practice exercises 10, 11, 12, and 13. This repository contains my solutions to various SQL challenges on HackerRank, organized by categories and difficulty levels. Sep 16, 2024. Sample Output. hacker_id) as cnt FROM hackers h INNER JOIN challenges c ON h. SQL. 02%. This set of exercises is designed to challenge your SQL muscle and help internalize data wrangling using window functions in SQL. SQL, the Structured Query Language, is a cornerstone skill for anyone working with data. Star 0. 82%. All the solutions shared here are only for educational and learning purposes. In this post, I’ll share my solutions to some SQL problems on HackerRank, categorized as “Easy. “Hackerrank SQL Practice questions-P2” is published by Ankit songara. 2 of 6; Choose a language Select the language you wish to use to solve this HackerRank is a great place to compete in Hackathons events, solving futuristic coding problem that are sometimes less relevant with real business problems. ; Hard: Advanced-level SQL challenges. Go to the editor] . Problem. Feb 26, 2023. 50%. Leaderboard. 2 of 6; Choose a language Select the language you wish to use to solve this Q3. Weather Observation Station 5 Query the two cities in STATION with the shortest and longest CITY names, as well as their respective lengths (i. There are a total of 58 problems of varying difficulty level that test different concepts. It serves as a platform to enhance my SQL skills and share my solutions with others. 2 of 6; Choose a language Select the language you wish to use to solve this The more you practice, the greater the possibility that the real-life data problems you’ll have to solve will be similar or completely the same as what you’ve already done! We’ll see how to do that in this part of the SQL joins practice. This repository contains solutions to HackerRank SQL challenges ranging from beginner to advanced levels. Hard. We use cookies to ensure you have the best browsing experience on our website. Subdomains. Some challenges include additional information to help you out. Each solution includes a brief explanation of the problem and my approach to solving it. Medium. SQL Challenges-1: SQL Challenges-1 [77 Exercises] More to come. 2. This STATION table for some problems below: 7) Weather Observation Station 1 Problem Query a list of CITY and STATE from the STATION table. com practice problems using Python 3, С++ and Oracle SQL - marinskiy/HackerrankPractice SQL (Intermediate) SQL (Advanced) Difficulty. Jane 9 81. Whether you're a beginner or an experienced data professional, these Medium SQL (Intermediate) Max Score: 20 Success Rate: 96. Medium SQL (Intermediate) Max Score: 30 Success Rate: 96. Hard SQL (Advanced) Max Score: 50 Success Rate: 78. as well as for procurement and distribution of all prizes. com practice problems using Python 3, С++ and Oracle SQL - HackerrankPractice/SQL/02. 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. Subdomain Challenge Score Difficulty Solution; Basic Select: Revising the Select Query I: 10: Easy: Solution. Query the NAME field for all American cities in the CITY table with populations larger than 120000. Updated Oct 10, 2023; PL/SQL Fundamentals: PL/SQL (Procedural Language/Structured Query Language) is Oracle Corporation's procedural extension for SQL and the Oracle relational database. This can help This repository contains solutions to Hackerrank practice problems in SQL, C++, Java Python and Problem Solving (Data Structures and Algorithms). Solved. working as a data engineer or programmer. These concepts require a deeper understanding of SQL and its ecosystem. HackerRank is completely free for developers and users. We have carefully curated these challenges to help you prepare in the most comprehensive way possible. Julia 9 88. Accelerate your Job Search. L ike most other competitive programming platforms, HackerRank groups challenges into different difficulty levels. My code for this challenge is in MySQL: SELECT c. About. The output is in a "code-ish" format. Verify your SQL Skills. In. 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 SQL Practice Problems 57 beginning, intermediate, and advanced challenges for you to solve using a "learn-by-doing" approach Sylvia Moestl Vasilik an area where it’s hard for people to get solid practice with real life data problems, without actually . 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. We present a curated list of 12 top-notch platforms that offer a variety of SQL exercises and challenges to help you hone your SQL skills. Submissions. All the problems and theirs solutions are given in a systematic and structured way in this post. Sign up for Java-SQL-Practice now. 1. name as name, COUNT(c. Nikhitha Perapola. Projects cover finance, healthcare and other sectors, and highlight my ability to analyze complex datasets through SQL queries, data manipulation, and visualization techniques. com practice problems using Python 3, С++ and Oracle SQL. Remember to follow the tips and solutions provided in this guide to ensure you’re 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 Let's walk through this sample challenge and explore the features of the code editor. Basic Select. It is organized into six folders, each containing my solutions for easy, medium and difficult challenges executed in a MySQL environment. Functional Programming. Challenges: 21, Attempts: 1022447, Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. It's frustrating. ! Structure of inventory database : Structure of HR database : SQL Problem Statement: Julia asked her students to create some coding challenges. Databases. Hard SQL (Intermediate) Max Score: 50 Success Rate: 85. mysql practice solutions hackerrank problem-solving hackerrank-solutions hackerrank-sql hackerrank-sql-solutions. Right Menu Left Menu. Unions-This competency includes using unions to display multiple sets of information in the same report. This is the only video you will need to improve you Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Regex. 85%. Medium SQL (Basic) Max Score: 25 Success Rate: 98. It enables users to combine SQL statements with procedural constructs, providing capabilities such as variables, loops, conditional statements, and exception handling. SQL window functions are a powerful feature that lets us extract meaningful insights from our data easily, yet few SQL courses offer SQL window functions exercises. Advanced Join. Reason: Advanced joins and set operations are necessary Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. You can tackle SQL problems and receive instant feedback to enhance your skills. It is guaranteed that the difference between the End_Date and the Start_Date is equal to 1 day for each row in the table. Hackerrank is a great platform to practice SQL queries. Summary. ; If you are interested in adding more Hackerrank problem solutions, please feel free to This is for your Practice, In this you will get problems based on what you learn today. We also need a new dataset, so Medium SQL (Intermediate) Max Score: 20 Success Rate: 96. Key Concepts. Field From table1 t" instead of "select t. You signed in with another tab or window. Updated Dec 24, 2023; Star 731. hacker_id as id, h. by. Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. SQL, and more. Here are some of the benefits of using HackerRank for SQL: Challenges: These problems can help you practice your SQL skills. "SQL Practice Problems: 57 beginning, intermediate, and advanced challenges for you to solve using a "learn-by-doing" approach" by Sylvia Moestl Vasilik About. This platform is at the top of my personal list for practice. SQLZoo: Interactive tutorials and exercises. python php sql algorithms regex data-structures hakerrank-solutions hakerrank-problem-solving. Hackers Table . From the following tables write a SQL query to find the salesperson and customer who reside in the same city. SQL (Basic) SQL (Intermediate) SQL (Advanced) Difficulty. mysql sql hackerrank practice Join over 11 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Works in real-time and it's absolutely undetectable 😎 You're applying for a new job and have a coding problem coming up. If the End_Date of the HackerRank is the market-leading coding test and interview solution for hiring developers. Sign up for SQL_Assignments_Batch-2 now. Easy Welcome to the ultimate HackerRank SQL Solutions playlist by Data Analyst Explorers! 📊 Whether you're a budding data enthusiast or an experienced analyst, SQL Challenges Solutions HakerRank. hacker_id = c. Explore; Problems; Contest; Discuss; Interview. Kamireddy Mahendra. com practice problems in C++, python and SQL Topics mysql practice sql math algorithms cpp solutions solution mathematics python3 hackerrank algo problems pyhton hackerrank-solutions Hackerrank - SQL Practice Problems. Maria 10 99. Updated Jun 12, 2023; SQL; Brandon-Martinez27 / hackerrank-sql. Towards Data Engineering. SELECT COUNT(CITY) — COUNT(DISTINCT CITY) FROM STATION ; X. Subqueries-This competency includes using data based on information returned from a different query. patient_id: INT: first_name: TEXT: last_name: TEXT: gender: CHAR(1) birth_date: DATE: city: TEXT: province_id: CHAR(2) Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. Alternative Queries. This collection serves as a practical guide for anyone looking to improve their SQL skills Complex joins-This competency includes using INNER, LEFT, RIGHT, and FULL joins on multiple tables and using joins for many-to-many relationships. hackerrank coding-interviews hackerrank-python hackerrank-solutions hackerrank-java hackerrank-python-solutions hackerrank-challenges hackerrank-sql cracking-code-interview hackerrank-sql-solutions hackerrank-practice hackerrank-all-solutions hackerrank-c-solutions hackerrank-practice-solutions hackerrank-certificates hackerrank-interview Hello coders, in this post you will get all the solution of HackerRank SQL Solutions. Tip 2 - Practice Writing SQL Without Executing Code. Medium SQL (Intermediate) Max Score: 30 Success Rate: 97. So, without wasting any time, let’s jump to the solutions. hackerrank hackerrank-python hackerrank-solutions hackerrank-sql. jqy myfptmnw tfwacac ihtjhdx rir tqrepl lhjvi vlznxg ptvjt kswxx