Hacker rank basic sql Reason: Basic queries are essential for retrieving data from a database. Rules. The following tables contain contest data: Hackers: The hacker_id is the id of the hacker, and name is the name of the hacker. grade > 7) union all (select null, g. Medium SQL (Intermediate) Max Score: 30 Success Rate: 96. Problem Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Tuy nhiên, bạn sẽ dễ chán nản nếu gặp ngay những bài Hard hoặc Medium ngay từ đầu. I got the sol but it was not in the simple way and also took time in processing. Start hiring at the pace of innovation! order by does not work separately for two select. Take the HackerRank Skills Test. name from submissions s inner join challenges c on s. recency | MS SQL SERVER. name end as name, g. we need to use order by at the end of query. Advanced Select. 56%. roll_number HAVING SUM(b. Problem -> URL Difficulty Level: Medium Pseudocode: Create temporary view total_challenges, . 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. 60%. Solve Challenge You signed in with another tab or window. We will send you an email when your results are ready. Basic Select Challenges. Hacker-Rank Basic SQL Quires This repository contains solutions to the Basic SQL Queries challenges on HackerRank. What is the HackerRank Skills Certification Test? The HackerRank Skills Certification Test is a standardized assessment aimed at evaluating a developer’s technical proficiency. 82%. Basic Select. Merit Rewards 1. Code. Prove your Skills. roll_number, a. You can also visit: HackerRank C Language Solutions Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. sql. 83%. Reload to refresh your session. higher grades are entered first. Select All. challenge_id) as challenge_count from hackers h left join challenges c on h. RANK, DENSE_RANK, LEAD, LAG. Prizes. Binary Tree Nodes. The report must be in descending order by grade -- i. Also, if another entry of different occupation is done then code is to be updated again. Curate this topic Add this topic to your repo To associate your repository with the Weather Observation Station 5 :: HackerRank Easy SQL Challenge UNION ALL of two queries ¶ One approach is to use two queries: one for the city name length, and another one for the min city name length, limit by 1, and union the results to create a single resulting tabular structure: Easy SQL (Basic) Max Score: 10 Success Rate: 99. Problem solved-5. Further Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. It contains solutions to various SQL problems organized by topics, allowing users to enhance their SQL skills systematically. is_evil = 0) select id, age, coins_needed, power from cte1 where rank1 = 1 order by power desc, age desc; This repository contains my solutions to various SQL problems on HackerRank. Once you pass the certification exam, you will receive an SQL certification from HackerRank, which can be added to your resume to demonstrate your proficiency in SQL. name, count(c. 1. The solutions cover a wide range of SQL challenges, from basic queries to more advanced concepts such as aggregations, joins, and subqueries. This repository contains solutions to all the HackerRank SQL Practice Questions - Pavith19/HackerRank-SQL-Challenges-Solutions. Exclude all hackers with a total score of 0 from your result. Starts in. difficulty_level = d. Raw. 29%. Hello coders, in this post you will get all the solution of HackerRank SQL Solutions. Join hackers and challenges on hacker_id column. subject_one + If more than one hacker achieved the same total score, then sort the result by ascending hacker_id. Grades contains the following data:. code = b. Query all columns (attributes) for every row in the CITY table. Weather Observation Station 19. Discussions. MySQL code. hacker_id group by hacker_id, h. A special-purpose language designed for managing data held in a relational database. So, without wasting any time, let’s jump to the solutions. This is one question solution to the HackerRank SQL Basic Certification problem and this is shared for your increasing knowledge. Occupations. ; Select hacker. This was curated after solving all 58 questions, and achieving a score of 1130 points (WR1) Write a query to print the respective hacker_id A special-purpose language designed for managing data held in a relational database. subject_one + b. SQL Problem Statement: Julia asked her students to create some coding challenges. Medium Max Score: 30 Success Rate: 91. Group By hacker. The Report. marks between g. Sort your results by the total number of challenges in descending order. Ketty doesn't want the NAMES of those students who received a grade lower than 8. - adminazhar/hackerrank-SQL-basic-skills-certification-test-solution Input Format. If more than one hacker received full scores in same number of challenges, then sort them by ascending hacker_id. Top. 59%. Japanese Cities' Attributes. The HackerRank Skills These concepts cover the fundamental syntax and basic features of SQL. In this guide, we’ll break down 5 Contains solved queries for the Hackerrank SQL (Basic) Skills Certification Test 🎓. min_mark and Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. score SQL. To handle If more These Contain Some SQL Programming Solution of Hacker Rank😏 Contains solved queries for the Hackerrank SQL (Basic) Skills Certification Test 🎓. sql sql-server hackerrank sql-query sqlserver hackerrank-solutions hackerrank-sql hackerrank-sql-solutions hacker-rank hackerrank Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Feel free to ask doubts in the comment section. score Easy SQL (Basic) Max Score: 10 Success Rate: 99. Ketty gives Eve a task to generate a report containing three columns: Name, Grade and Mark. 09%. SQL Problem Statement: Ketty gives Eve a task to generate a report containing three columns: Name, Grade and Mark. recency | 5055 1 day ago + 1 comment. hacker_id and hacker. Reason: Window functions provide powerful tools for performing / SQL (Basic) Skill Test / Student analysis. Medium SQL (Intermediate) Max Score: 30 Success A special-purpose language designed for managing data held in a relational database. subject_three) < 100; Easy SQL (Basic) Max Score: 10 Success Rate: 98. Medium SQL (Basic) Max Score: 25 Success Rate: 98. The report must be in descending order by grade Challenges. select h. Solve Challenge. These challenges are designed to help you improve your SQL skills by providing a set of problems to solve. The certificate can be viewed here. Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Activities involved: Writing and using subqueries in SELECT, FROM, WHERE clauses. New Companies. Status Click here to see solutions for all Machine Learning Coursera Assignments. Query all columns for all American cities in the CITY table with populations larger than 100000. Medium SQL (Basic) Max Score: 30 Success Rate: 93. hacker_id inner join Difficulty on Challenges. 1 of 6 Review the problem statement Each challenge has a problem statement that includes sample inputs and outputs. Example Task: Write a query to select specific columns from a table and filter the results using a WHERE clause. 15%. SELECT a. roll_number group by b. This repository tracks my progress through the SQL course on HackerRank. hacker_id as id, Hackers. Revising the Select Query I. Activities involved: Writing SELECT statements, filtering results with WHERE clauses. subject_two + b. Easy SQL (Basic) Max Score: 10 Success Rate: 98. Ayo, coba teman-teman share apakah teman-teman bisa mengerjakan tes Inside you will find the solutions to all HackerRank SQL Questions. hacker_id, h. Weather Observation Station 20. 14%. difficulty_level inner join hackers h on s. 2 Questions are asked, as of now 2 questions will be asked from these questions, provided the solution: Full HackerRank SQL Basic Certification Solution Video Student Analysis SQL solution in SQL SELECT a. Whether you’re a beginner or a professional wanting to sharpen your skills, mastering SQL queries can set you apart in the job market. e. File metadata and controls. Click here to see more codes for NodeMCU ESP8266 and similar Family. This competency area includes the understanding of basic concepts like Medium SQL (Basic) Max Score: 30 Success Rate: 93. Medium SQL (Intermediate) Max Score: 30 Success Rate: 97. grade, s. Difficulty: The difficult_level is the level of difficulty of the challenge, and Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. The CITY table is described as follows: DB2 To modify the SQL query to print the results in a concatenated string format like "3 Richard" instead of showing them as a table, you can use the CONCAT function (or || operator, depending on the SQL database you are using) to concatenate the employee_ID and name columns into a single string for each row. Medium SQL (Intermediate) Max Score: 40 Success Rate: 95. The CITY table is described as follows: Query all columns for every row in a table. roll_number,a. so in this case the query will be: (select s. name FROM student_information a INNER JOIN examination_marks b ON a. Status Easy SQL (Basic) Max Score: 10 Success Rate: 98. Join me as I tackle challenges ranging from basic queries to Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. 65%. You may add any prizes that you would like to offer here. All the problems solved in the first part of this series are used to practice basic SQL commands such as how to set basic filter conditions and how to select all columns from a table. jianyliu. These concepts introduce more complex features and functionalities of SQL. max_mark order by g. Cannot retrieve latest commit at this time. id as id, b. max_mark where g. hacker_id, h. - naresy/Hacker-Rank-Basic-Skill-Student Medium SQL (Basic) Max Score: 30 Success Rate: 93. Thanks to discussion SQL. challenge_id inner join difficulty d on c. grade desc, case These concepts require a deeper understanding of SQL and its ecosystem. Problem. Contains solved queries for the Hackerrank SQL (Basic) Skills Certification Test 🎓. They are necessary for writing simple SQL queries and understanding the core structure and flow of database Contains solved queries for the Hackerrank SQL (Basic) Skills Certification Test 🎓. You are viewing a single comment's thread. Click here to see more codes for Arduino Mega (ATMega 2560) and similar Family. hacker_id = Submissions. - adminazhar/hackerrank-SQL-basic-skills-certification-test-solution A special-purpose language designed for managing data held in a relational database. It took me a bit more than two weeks (on and off between work, workout, and taking the kid to day school, etc. Share with friends: Sign Up. Easy SQL (Basic) Max Score: 10 Success Rate: 99. Number Challenges Solutions; 1: Revising the Select Query I: SQL: 2: Revising the Select Query II: SQL: 3: Select All: SQL: 4: Select By ID: SQL: 5: Japanese Cities' Attributes: SQL: 6: with cte1 as (select a. Basic. The CountryCode for America is USA. I will try my best to 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. 66%. In this post, I’ll share my solutions to some SQL problems on HackerRank, categorized as “Easy. ) to finish all the 58 SQL challenges on the site, and I gained quite some insights from the journey (and having Add a description, image, and links to the hackerrank-sql-basic topic page so that developers can more easily learn about it. SQL. - adminazhar/hackerrank-SQL-basic-skills-certification-test-solution SQL. HackerRank is the market-leading coding test and interview solution for hiring developers. 7 tips giúp bạn hoàn thành 58 SQL HackerRank challenges trong 1 tuần & đạt 3 SQL certificates (basic – intermediate – advanced) trong 2 giờ Hacker sẽ sắp xếp cho mọi người học theo từng chủ đề. Accelerate your Job Search. The PADS. name from student_information a inner join examination_marks b on a. min_mark and g. name as name from Hackers inner join Challenges on Hackers. Microsoft Azure is a platform that offers a broad feature set including hybrid cloud, support for open-source, integration with Microsoft tools and software, and many more over most of the parts of the world. About. Medium SQL (Intermediate) Max Score: 20 Success Rate: 96. Sort by. The Merit Rewards SQL problem is a question presented in the HackerRank Basic SQL Certification exam. marks from students s inner join grades g on s. roll_number having sum(b. Click here to see solutions for all Machine Learning Coursera Assignments. 68%. hacker_id=c. The HackerRank SQL Basic Certification is one of the most sought-after certifications for aspiring developers and data enthusiasts looking to validate their SQL skills. Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Tesnya lumayan sederhana. Students contains three columns ID, Name and Marks. . Sample Input. ” I used the MySQL option on the platform to solve each of the challenges. You signed in with another tab or window. Medium SQL (Basic) Max Score: 30 Success Rate: 98. Reason: Window functions provide powerful tools for performing Verify your SQL Skills. HackerRank SQL Solutions. Blame. Leaderboard. marks from students s join grades g on s. hacker_id = Challenges. Editorial. power as power, rank over (partition by age, power order by coins_needed) as rank1 from wands as a left join wands_property as b on a. Write a query to print the hacker_id, name, and the total number of challenges created by each student. name order by challenge_count desc, Here are the 4 questions asked in HackerRank SQL Basic Certification Exam, from these 2 will be available in one attempt. score = Submissions. Employee Salaries. - adminazhar/hackerrank-SQL-basic-skills-certification-test-solution Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Simple MySQL solution. age as age, a. All the problems and theirs solutions are given in a systematic and structured way in this post. Ketty doesn't want the NAMES of those students who received a grade lower than 8. SQL (Basic) - Processing We are evaluating your submitted code. The goal of this repository is to demonstrate problem-solving skills, proficiency in SQL, and understanding of database concepts. They are necessary for optimizing performance, managing complex queries, ensuring data integrity, and leveraging advanced features for high-level query design and development. 04%. SELECT IF (GRADE < 8, NULL, NAME), GRADE, MARKS FROM STUDENTS JOIN GRADES WHERE MARKS BETWEEN Basic Select. 8 years ago + 59 comments. 69%. name. Prizes are optional. HackerRank offers certifications for three experience levels: Basic SQL Skills. select case when g. Query an alphabetically ordered list of all names in OCCUPATIONS, immediately followed by the first letter of each profession as a parenthetical (i. roll_number = b. Skill over pedigree. Futher queries will per written on this view CREATE VIEW hacker_challenge_count AS select h. challenge_id = c. Important Notes: -- creating a view for hacker id, name and no of challenges. Solutions to HackerRank practice, tutorials and interview preparation problems with Python, SQL, C# and JavaScript - nathan-abela/HackerRank-Solutions You are given two tables: Students and Grades. - adminazhar/hackerrank-SQL-basic-skills-certification-test-solution Easy SQL (Basic) Max Score: 10 Success Rate: 99. Return to all comments →. roll_number GROUP BY b. Basic SQL Queries. Kita coba menyelesaikan sertifikasi dasar SQL pada hacker rank. They are essential for building more sophisticated and robust queries, managing data relationships, and optimizing query performance. Vì SQL Basic Test SQL BAsic to . Please provide a short description of your contest here! This will also be used as metadata. shivarajesh91. grade < 8 then 'null' else s. The start date of the contest was March 01, 2016 and the end date was March 15, 2016. : enclosed in parentheses). Write a query to find the employee IDs along with the names of all its employees who work in the HR department who earned a bonus of 5000 dollars or more in Contains solved queries for the Hackerrank SQL (Basic) Skills Certification Test 🎓. hacker_id where s. You signed out in another tab or window. difficulty_level = Difficulty. score = d. coins_needed as coins_needed, a. hacker_id = h. Order your output in descending order by the total number of challenges in which the hacker earned a full score. Click here to see more codes for Raspberry Pi 3 and similar Family. I will try my best to Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. hacker_id where Difficulty. ; Create temporary view required_ids, . Top Competitors. It turned out not to be necessary to sort by "employee_id": SELECT name FROM employee WHERE salary > 2000 AND months < 10; 0 | Permalink. 1 lines (1 loc) · 209 Bytes. 57%. On the basis of merit, a company decides to promote some of its employees in its HR division at the end of the quarter because of their high performance. Status Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Each solution is written in MySQL and includes detailed comments to explain the logic and approach used to solve the problem. Input Format. Write a query to print the respective hacker_id and name of hackers who achieved full scores for more than one challenge. Subqueries and Nested Queries. 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. difficulty_level inner join Submissions on Hackers. Julia conducted a days of learning SQL contest. I took the HackerRank test on 10/11/2023. Medium SQL (Intermediate) Max Score: 30 Success WITH temp as (select Hackers. Submissions. You switched accounts on another tab or window. A3. ; Aggregate count of challenges for every hacker. Duration: 30 minutes; Concepts: simple queries, relationships, and aggregators; Intermediate SQL Skills These concepts introduce more complex features and functionalities of SQL. SQL (Basic) #1 SQL: Merit Rewards. Verify your SQL Skills. code where b. Student analysis SQL solution- SELECT a. Medium SQL (Intermediate) Max Score: 30 Success Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. For example Challenge Walkthrough Let's walk through this sample challenge and explore the features of the code editor. Take the HackerRank Certification Test and showcase your knowledge as a HackerRank verified developer. Basic Join. SELECT CASE WHEN A + B <= C OR A + C <= B OR B + C <= A THEN 'Not A Triangle' WHEN A = B AND B = C THEN 'Equilateral' WHEN A = B OR A = C OR B = C THEN 'Isosceles' ELSE SQL. subject_three) < 100; These concepts require a deeper understanding of SQL and its ecosystem. Revising the Select Query I – HackerRank Solution Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. 85%. name, g. So, without wasting any time, let’s jump to the GitHub - MahedeiHasan/Hackerrank-SQL-Basic-Skills-Certification-Test-Solutions: Solved queries for the Hackerrank SQL (Basic) Skills Certification Test 🎓. SQL Problem Statement: 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 challenge. This might sometimes take up to 30 minutes. Query the data for all American cities with populations larger than 100,000.