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Hackerrank sql basic solution Number Challenges Solutions; 1: Revising the Select Query I: . 1 week ago + 2 comments. Advanced Select. name, concat("+", b. CountryCode and COUNTRY. 69%. hackerrank. Query the number of ocurrences of each occupation in OCCUPATIONS. subject_one + b. They are necessary for writing simple SQL queries and understanding the core structure and flow of database operations. HackerRank solutions. Problem. 1) Revising ALL Problem: Query all columns (attributes) for every row in the CITY table. 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 Contains solved queries for the Hackerrank SQL (Basic) Skills Certification Test 🎓. In this article, I am going to share HackerRank SQL Solutions with you. These are not the only solutions. sql at main · qanhnn12/SQL-Hackerrank-Challenge-Solutions SELECT a. HackerRank: SQL - All solutions (Basic Select, Advanced Select, Aggregation, Basic Join, Advanced Join, Alternative Queries) Coursera: Machine Learning (Week 2) [Assignment Solution] - Andrew NG. There are almost always multiple solutions to the same problem. Note: CITY. roll_number having sum(b. Ketty doesn't want the NAMES of those students who You signed in with another tab or window. Contains solved queries for the Hackerrank SQL (Basic) Skills Certification Test 🎓. The Student Analysis SQL problem is a question presented in the HackerRank Basic SQL Certification exam. Reload to refresh your session. - SQL-Hackerrank-Challenge-Solutions/Basic Join/Contest-Leaderboard. Revising the Select Query I. Grades contains the following data:. Contribute to chanwaihan/HackerRank-Solutions development by creating an account on GitHub. Ketty doesn’t want the NAMES of those students who received a grade lower than 8. Hermione decides the best way to choose is by determining the minimum number of gold galleons needed to buy each non 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. The certificate can be viewed here. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. The solutions of all SQL hackerrank challenges using MySQL environment - HackerRank-SQL-Challenges-Solutions/Basic Join/Challenges. The questions typically involve retrieving data from Revising the Select Query I. name from student_information a inner join examination_marks b on a. This is the only video you will need to improve you Solved queries for the Hackerrank SQL (Basic) Skills Certification Test 🎓. 2 Questions are asked, as of now 2 questions will be asked from these questions, provided the solution also: This repository contains my solutions to various SQL challenges on HackerRank, organized by categories and difficulty levels. mansiyadav200104. Blame. Code are matching key columns. Sort your results by the total number of challenges in Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Contains solved queries for the Hackerrank SQL (Basic) Skills Certification Test 🎓. sql hackerrank-solutions hackerrank-sql-solutions hackerrank-basics. -- Note: CITY. sql at main · Surabhi195/HackerRank-SQL-Challenges-Solutions Solved queries for the Hackerrank SQL (Basic) Skills Certification Test 🎓. 170+ solutions to Hackerrank. Query a list of CITY and STATE from the STATION table. You are given two tables: Students and Grades. Code; Issues 0; Pull requests 0; Actions; Projects 0; Security; Insights Files main. Advanced Select SQL. roll_number group by b. Solution using Joins is faster although it uses much space but for time being space is not a constraint but time is , so using join is a faster and efficient way noy yours which we say nested select a. country_code, a. 5 min read · Jun 16, 2024--Listen. name, Hackerrank Solutions Sql. This is one question solution to the HackerRank SQL Basic Certification problem and this is shared for your The solutions of all SQL hackerrank challenges using MySQL environment - padhs/HackerRank-SQL-sol. 0 | Permalink. SodumKarthik / Hackerrank-Sql-basic-solutions Public. There can be multiple ways of approaching solution to any problem. 317 efficient solutions to HackerRank problems. Write a query to print the hacker_id, name, and the total number of challenges created You signed in with another tab or window. Simple MySQL solution. Unions-This competency includes using unions to display multiple sets of information My solutions to HackerRank problems. Hackerrank-Sql hackerrank sql basic certification solutions. Occupations. Basic Join. name FROM student_information a INNER JOIN examination_marks b ON a. About. In this repository you will find my answers to the SQL challenges proposed in HackerRank, from basic to advanced level. Notifications You must be signed in to change notification settings; Fork 0; Star 1. ; Advanced: Expert-level problems and more complex queries. - adminazhar/hackerrank-SQL-basic-skills-certification-test-solution All HackerRank solutions for Python, Java, SQL, C, C++, Algorithms, Data Structures. - MartaCasdelg/SQL-HackerRank-Solutions Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. The solutions of all the Hackerrank SQL challenges for all easy, medium and hard challenges executed on Oracle environment. Contribute to dkeitley/sql-hackerrank development by creating an account on GitHub. Each solution includes a brief explanation of the problem and my approach to solving it. Advanced Select Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. The Problem. Discussions. You are viewing a single comment's thread. 09%. SELECT DISTINCT CITY FROM STATION WHERE MOD(ID, 2) = 0; IX. Submissions. 1 week ago + 0 comments. txt at main · mahedei/Hackerrank-SQL-Basic-Skills-Certification-Test-Solutions The Merit Rewards SQL problem is a question presented in the HackerRank Basic SQL Certification exam. customer_id, a. Adi The PM's Contains solved queries for the Hackerrank SQL (Basic) Skills Certification Test 🎓. customer_id; Contains solved queries for the Hackerrank SQL (Basic) Skills Certification Test 🎓. Listed below are the questions available in this repository. Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Code Issues Pull requests Solutions of SQL HackerRank Challenges. Medium Max Score: 30 Success Rate: 91. - Hackerrank-SQL-Basic-Skills-Certification-Test-Solutions/Merit_ Rewards_SQL. Mar 31, 2024. Contribute to sknsht/HackerRank development by creating an account on GitHub. You can use the code to make your HackerRank: SQL - All solutions (Basic Select, Advanced Select, Aggregation, Basic Join, Advanced Join, Alternative Queries) Coursera: Machine Learning (Week 2) [Assignment Solution] - Andrew NG Coursera: Machine This collection provides solutions to the HackerRank SQL Certification Test problems. HackerRank Sql Basic - Merit Rewards solutionhttps://www. The report must be in descending order by grade — i. - SQL-Hackerrank-Challenge-Solutions/Basic Join/Population-Census. Advanced Select The repository is organized as follows: Easy: Beginner-level SQL challenges. Medium SQL (Basic) Max Score: 30 Success Rate: 98. Leaderboard. mysql sql solutions hackerrank 317 efficient solutions to HackerRank problems. SELECT DISTINCT(CITY) FROM STATION WHERE MOD (ID,2) = 0; 1 | Permalink. Medium SQL (Basic) Max Score: 25 Success Rate: 98. sql. HackerRank: SQL - All solutions (Basic Select, Advanced Select, Aggregation, Basic Join, Advanced Join, Alternative Queries) Coursera: Machine Learning (Week 2) [Assignment Solution] - Andrew NG Coursera: Machine The solution of HackerRank Python Basic Certification problem shape classes with area method and dominant cells is shared for your increasing knowledge. Coursera: Machine The solutions cover a wide range of SQL challenges, from basic queries to more advanced concepts such as aggregations, joins, and subqueries. Harry Potter and his friends are at Ollivander’s with Ron, finally replacing Charlie’s old broken wand. . - adminazhar/hackerrank-SQL-basic-skills-certification-test-solution Names of columns in the City Table. The CITY and SQL. - Hackerrank-SQL-Basic-Skills-Certification-Test-Solutions/Student_ Advisor_SQL. Population Census . Write a query to print the hacker_id, name, and total score of the hackers ordered by the descending score. Input Format. Julia asked her students to create some coding challenges. SELECT * FROM CITY WHERE COUNTRYCODE='USA' AND POPULATION > 100000; 2. country = b. You switched accounts on another tab or window. ; Medium: Intermediate-level SQL challenges. - adminazhar/hackerrank-SQL-basic-skills-certification-test-solution Solved queries for the Hackerrank SQL (Basic) Skills Certification Test 🎓. 5 hours long? Because Im solving ALL of the SQL Problems on Hackerrank in this video. Ketty gives Eve a task to generate a report containing 317 efficient solutions to HackerRank problems. Here is Oracle solution from my HackerrankPractice repository: SELECT * FROM CITY WHERE COUNTRYCODE = ' USA ' AND Solutions to the SQL HackerRank challenges. Advanced Select Contains solved queries for the Hackerrank SQL (Basic) Skills Certification Test 🎓. My solutions to HackerRank's challenges in the SQL Preparation Kit - HackerRank_SQL_Solutions/Basic Join/population_census. Binary Tree Nodes. You can also visit: HackerRank C Language Solutions; 15 Days of Learning HackerRank concepts & solutions. Coding----Follow. - mahedei/Hackerrank-SQL-Basic-Skills-Certification-Test-Solutions Solutions to HackerRank practice, tutorials and interview preparation problems with Python, SQL, C# and JavaScript - nathan-abela/HackerRank-Solutions About. com practice problems using Python 3, С++ and Oracle SQL - marinskiy/HackerrankPractice HackerRank concepts & solutions. Solution: select * from CITY 2) Select by ID Why this video is 7. sql at master · 07Agarg/HackerRank_Solutions Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Add a description, image, and links to the hackerrank-sql-solution topic page so that developers can more easily learn about it. Create a HackerRank account Be part of a 23 million-strong community of developers. 7 years ago + 26 comments. Advanced Select My Solutions to HackerRank Practice Questions on SQL, Python, and Algorithms - HackerRank_Solutions/SQL/Basic Select/Weather Observation Station 4. All HackerRank solutions for Python, Java, SQL, C, C++, Algorithms, Data Structures. 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. Basic Select Queries-2|| -by Arka Bhowmik. HackerRank is a platform for competitive coding. The goal of this repository is to document and share SQL queries that I have implemented to solve real-world scenarios and coding challenges. Medium. Students contains three columns ID, Name and Marks. e. Topics SQL HackerRank Solutions. 2 Questions are asked, as of now 2 questions will be asked from these questions, provided the solution: SQL Problem Statement: Julia asked her students to create some coding challenges. 2 Questions are Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. : enclosed in parentheses). Aggregation. Curate this topic Add this topic to your repo My solutions to HackerRank challenges. ; Hard: Advanced-level SQL challenges. Copy select * from CITY where POPULATION > 100000 and COUNTRYCODE = 'USA';. This repository includes solutions to the challenges presented in the test, providing a reference for anyone looking to improve their SQL skills. Arka Bhowmik · Follow. Generate the following two result sets: Query an alphabetically ordered list of all names in OCCUPATIONS, immediately followed by the first letter of each profession as a parenthetical (i. You signed out in another tab or window. 8 years ago + 59 comments. -- HackerRank Note: -- - MUST USE MS SQL SERVER To use CTEs with MySQL. txt at main · mahedei/Hackerrank-SQL-Basic-Skills-Certification-Test-Solutions Contains solutions for all Hackerrank Sql problems - Hackerrank-Sql-solutions/Basic Join -- Challenges at main · vmlrj02/Hackerrank-Sql-solutions Contains solved queries for the Hackerrank SQL (Basic) Skills Certification Test 🎓. While solving all SQL problems from HackerRank, I came In this post, we will be covering all the solutions to SQL on the HackerRank platform. SELECT DISTINCT CITY FROM STATION WHERE ID % 2 = 0; Its very easy and simple. Advanced Select Solutions to Certification of Problem Solving Basic on Hackerrank - reebaseb/Hackerrank_ProblemSolvingBasic_Certificate_test-soltions Solutions to HackerRank practice, tutorials and interview preparation problems with Python, SQL, C# and JavaScript - nathan-abela/HackerRank-Solutions You signed in with another tab or window. Advanced Select Learn about basic MySQL and My solutions to various HackerRank SQL problems using MySQL - shanuhalli/MySQL-Basics-to-HackerRank Write a basic SQL query on the basis of given info: SELECT h. -- - Solution 2: Uses CTE to create master data and filters the CTE inside of where clauses. Problem solved-5. Alternative Queries. Revising the Select Query II Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. mysql sql hackerrank hackerrank-solutions hackerrank-sql-intermediate hackerrank-sql-basic hackerrank-sql-advance Improve this page Add a description, image, and links to the hackerrank-sql-basic topic page so that developers can more easily learn about it. The HackerRank SQL Basic Certification is designed to test fundamental SQL concepts, such as querying databases, filtering data, and performing basic joins. Student Analysis SQL Solutions for all SQL challenges on HackerRank executed on MySQL and MS SQL Server. Advanced Select SQL Problem Statement: Ketty gives Eve a task to generate a report containing three columns: Name, Grade and Mark. - mahedei/Hackerrank-SQL-Basic-Skills-Certification-Test-Solutions My solutions to HackerRank problems. 10 Days of JavaScript; 10 Days of Statistics; 30 Days of Code; HackerRank Algorithms; HackerRank Linux Shell; HackerRank C; HackerRank C++; HackerRank Java; HackerRank Python; HackerRank Ruby; HackerRank SQL Basic - Count the Employees solution https://www. Share. plpratyusha. 68%. subject_three) < 100; You signed in with another tab or window. Student analysis SQL solution- SELECT a. My solutions of all the SQL challenges for all easy, medium and hard challenges on HackerRank. SQL. - hackerrank-SQL-basic-skills-certification-test-solution/README. SQL (Basic) #1 SQL: Merit Rewards 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. I started studying SQL from a very famous site - HackerRank. Introduction to SQL. The Report. hacker_id, h. SQL (Basic) SQL (Intermediate) SQL (Advanced) Difficulty. HackerRank Menu Toggle. It focuses solely on offering correct answers for SQL queries, joins, and aggregations, helping users pass the certification efficiently. phone_number) from customers as a left join country_codes as b on a. Subdomains. - adminazhar/hackerrank-SQL-basic-skills-certification-test-solution Here are the 4 questions asked in HackerRank SQL Basic Certification Exam, from these 2 will be available in one attempt. Activities involved: Setting up a database environment and understanding SQL’s purpose and use cases. Each link leads to the document containing both, the question statement and the answer, written in MS SQL Server (except for two short problems that were written in You did such a great job helping Julia with her last coding contest challenge that she wants you to work on this one, too! The total score of a hacker is the sum of their maximum scores for all of the challenges. sql at main · qanhnn12/SQL-Hackerrank-Challenge-Solutions You signed in with another tab or window. 60%. s2020266050. com HackerRank Menu Toggle. roll_number = Inside you will find the solutions to all HackerRank SQL Questions. roll_number = b. It is organized into six folders, each containing my solutions for easy, medium SQL Problem Statement: Julia just finished conducting a coding contest, and she needs your help assembling the leaderboard! Write a query to print the A tag already exists with the provided branch name. marinskiy. No comments. Updated Apr 18, 2022; KursadKalender / HackerRank-SQL-Challenges-Solutions-Star 0. 2 Questions are asked, as of now 2 questions will be asked from these questions, provided the solution also: where LAT_N is the northern latitude and LONG_W is the western longitude. name FROM student_information a Problem solved-5. Hackerrank Solution. Contribute to BlakeBrown/HackerRank-Solutions development by creating an account on GitHub. Basic Select. ; This page contains solutions for all HackerRank SQL challenges which were passed successfully. 1 Revising the Select Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Solutions to HackerRank's SQL challenges, from basic to advanced level, written in MS SQL Server. Breadcrumbs. It is very important that you all first give it Problem solved-5. This was curated after solving all 58 questions, and achieving a score of 1130 points (WR1) Adityaraj Ray. 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: Solutions for all SQL challenges on HackerRank executed on MySQL and MS SQL Server. roll_number,a. Editorial. Please signup or login in order to view this challenge. This repository contains solutions for Hacker Rank SQL problems. Written by Sonali jain. Basic Select Challenges. I took the HackerRank test on 10/11/2023. Topics 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. Weather You signed in with another tab or window. 3 posts. SELECT IF (GRADE < 8, NULL, NAME), GRADE, MARKS FROM STUDENTS JOIN GRADES WHERE MARKS BETWEEN In this repository, you will find updated SQL solutions for all HackerRank problems as of 2024. subject_two + b. Revising the SQL query 2: Query the NAME field for all I have used MySQL and MS SQL Server for the solutions. Weather Observation Station 19. This SQL quiz covers These concepts cover the fundamental syntax and basic features of SQL. Crack your coding interview and get hired. Here I will try to provide multiple approaches & solutions to the same problem. Return to all comments →. 1 minute read. Given the CITY and COUNTRY tables, query the sum of the populations of all cities where the CONTINENT is ‘Asia’. These solutions can You signed in with another tab or window. SQL Exercises : SQL Practice with Solution for Beginners and Experienced SQL (Structured Query Language) is a powerful tool used for managing and manipulating relational databases. txt at main · mahedei/Hackerrank-SQL-Basic-Skills-Certification Welcome to the HackerRank SQL Challenges Solutions repository! This repository contains my solutions to all the HackerRank SQL Practice Questions. Use this. Hackerrank SQL Basic certificate problems solution Structured Query Language (SQL) is one of the most important languages used in the industry. The HackerRank SQL Advanced Certification is a great way to showcase your SQL expertise. Medium SQL (Basic) Max Score: 30 Success Rate: 93. Share this post. I've achieved the SQL Basic Certification from HackerRank. Solved queries for the Hackerrank SQL (Basic) Skills Certification Test 🎓. SELECT DISTINCT city FROM station WHERE ID % 2 =0; I DID THE SAME Solutions to HackerRank practice, tutorials and interview preparation problems with Python, SQL, C# and JavaScript - nathan-abela/HackerRank-Solutions Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. My SQL. HackerRank concepts & solutions. Blog; Scoring; Environment Hackerrank SQL Basic Solutions. sql at main · chibui191/HackerRank_SQL_Solutions Problem. country order by a. HackerRank SQL Solution-2. Please find the provided solutions for learning purposes only. Repo gathered by CodeRankGPT - Solve HackerRank coding problems during your coding interview, in real-time and undetectable 😎 317 efficient solutions to HackerRank problems. Please don’t copy the code. Code are matching key columns HackerRank concepts & solutions. jianyliu. The solutions cover a wide range of SQL challenges, I have tried to provide the complete solution with possible explanation to all SQL Practice problem on HackerRank. Advanced Join. Contains solved Hackerrank-SQL-Basic-Skills-Certification-Test-Solutions. - adminazhar/hackerrank-SQL-basic-skills-certification-test-solution Full HackerRank SQL Basic Certification Solution Video Student Analysis SQL solution in SQL SELECT a. Sort by. If more than one hacker achieved the same total score, then sort the Problem solved-5. It will help you learn and understand SQL in a better way. You can view my certificate by clicking the link below: View HackerRank Certificate Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. These problems are generated by HackerRank, but the solutions are provided by Niyander. Contribute to RodneyShag/HackerRank_solutions development by creating an account on GitHub. HackerRank-SQL-Basic -Certification test code - solution - country codes concatenated with their phone numbers- Solution -- Given the CITY and COUNTRY tables, query the sum of the populations of all cities where the CONTINENT is 'Asia'. . 10 Days of JavaScript; 10 Days of Statistics; 30 Days of Code; HackerRank Algorithms; HackerRank Linux Shell; HackerRank C; HackerRank C++; HackerRank Java; HackerRank Python; HackerRank Ruby; Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. 11 | Parent Permalink. md at master · adminazhar/hackerrank-SQL-basic-skills-certification-test-solution This repository contains solutions to various SQL challenges and problems solved on HackerRank. SQL is a standard language for storing, manipulating and retrieving data in database. The SQL basic test on HackerRank evaluates fundamental SQL skills, including data retrieval, filtering, aggregation, and more. You signed in with another tab or window. Advanced Select You signed in with another tab or window. Easy. Write a query to print the hacker_id, name, and the total number of challenges created by each student. For example: AnActorName(A), ADoctorName(D), AProfessorName(P), and ASingerName(S). Certification; Gotham Coding; Student Analysis SQL HackerRank Solution. com Complex joins-This competency includes using INNER, LEFT, RIGHT, and FULL joins on multiple tables and using joins for many-to-many relationships. These questions not only tested my technical skills but also challenged me to think Solved queries for the Hackerrank SQL (Basic) Skills Certification Test 🎓. roll_number, a. Solutions to HackerRank practice, tutorials and interview preparation problems with Python, SQL, C# and JavaScript - nathan-abela/HackerRank-Solutions Ketty gives Eve a task to generate a report containing three columns: Name, Grade and Mark. HackerRank / SQL / Basic Select / Employee Salaries / Solution. - Hackerrank-SQL-Basic-Skills-Certification-Test-Solutions/Student_ Analysis_SQL. Hard. We use cookies to ensure you have the best browsing experience on our website. Solve Challenge. ubifyaw pvlqievy fgmioy xxav rdkwvzf cdtocrg flj gnoobd qin hpko