Hackerrank sql basic solution. Revising the Select Query I.

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