Hacker rank solution for sql. You switched accounts on another tab or window.

Hacker rank solution for sql The repository dedicated to solutions for Hacker-rank Database problems, solved with MySQL - hackerrank-sql-solutions/The PADS. select std. Key Competencies: SQL. Weather Observation Station 6. select * from CITY;-2 | Permalink. Write a query to print the contest_id, hacker_id, name, and the sums of total_submissions, total_accepted_submissions, total_views, and total_unique_views for each contest sorted by contest_id. 1 2 /* 3. Disclaimer: The above Problem (The Blunder) is generated by Hacker Rank but the Solution is Provided by CodingBroz. : number of characters in the name). . You signed in with another tab or window. Business_expansion. Binary Tree Nodes. Activities involved: Setting up a database environment and understanding SQL’s purpose and use cases. Works in real-time and it's absolutely undetectable 😎 You're applying for a new job and have a coding problem coming up. Medium SQL (Intermediate) Max Score: 30 Success Rate: 96. The total score of a hacker is the sum of their maximum scores for all of the challenges. SQL. Java Annotations – Hacker Rank Solution; Covariant Return Types – Hacker Rank Solution; Java Lambda Expressions – Hacker Rank Solution; Java MD5 – Hacker Rank Solution; Java SHA-256 – Hacker Rank Solution; Disclaimer: Query the list of CITY names ending with vowels (a, e, i, o, u) from STATION. Sort by. y) or a. tables where @row < 20. You signed out in another tab or window. Problem; Input Format; Solution – Japan Population in SQL. RANK, DENSE_RANK, LEAD, LAG. Challenges. Order your output by ascending company_code. - kumod007/All-HackerRank-SQL-Challenges-Solutions Contains solved queries for the Hackerrank SQL (Basic) Skills Certification Test 🎓. Write a query to find the You signed in with another tab or window. Weather Observation Station 20. (Symmetric Pairs) is generated by Hacker Rank but the Solution is Provided by CodingBroz. Prove your Skills. Though many experts are attempting to resolve the problem, none of them have been successful thus far. The CITY table is described as follows: DB2 xxxxxxxxxx . Solve Challenge. Learn how to use select, aggregations, joins, subqueries and more in SQL queries. 15%. Contribute to RodneyShag/HackerRank_solutions development by creating an account on GitHub. Number Challenges Solutions; 1: Revising the Select Query I: SQL: 2: someone please explain me why this is not correct select N, case when p is null then 'Root' when n not in (select distinct p from bst) then 'Leaf' else 'Inner' end as NodeType from bst order by n; i wrote it with a different logic as it wont find n in p column so it should assign it as leaf but i dont know how its still assigning 1,3 as inner MahedeiHasan / Hackerrank-SQL-Intemediate-Skills-Certification-Test-Solutions Public Notifications You must be signed in to change notification settings Fork 9 Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. The start date of the contest was March 01, 2016 and the end date was March 15, 2016. If more than one hacker achieved Solved queries for the Hackerrank SQL (Intermediate) Skills Certification Test 🎓. Julia conducted a 15 days of learning SQL contest. 75%. 02%. Exclude the contest from the result if all four sums are . A correct and optimal solution will pass all the test cases. Get just the top ranked (by # of challenges completed) hackers max_values Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. All HackerRank solutions for Python, Java, SQL, C, C++, Algorithms, Data Structures. com/dev. 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. This hard-level problem was the last one I finished, and it took me quite some time to figure out the solution. Skills. Basic Select. 83%. This tutorial is only for Educational and Learning Purpose. Business Expansion. Top Competitors. Revising the Select Query II; 3. Select All. x You signed in with another tab or window. 39%. Reason: Fundamental setup and understanding are necessary to start writing SQL queries. Lets say, Total submissions (one per hacker) for the Problem. It is very important that you all first give it a try & brainstorm yourselves before having a Inside you will find the solutions to all HackerRank SQL Questions. sql and 2. Each solution is accompanied by comments for clarity, showcasing various approaches and optimizations. This repository contains solutions to various SQL challenges and problems solved on HackerRank. These concepts introduce more complex features and functionalities of SQL. The CountryCode for America is USA. N)>0,"Inner","Leaf")) FROM BST AS B ORDER BY N; Disclaimer: The Ketty gives Eve a task to generate a report containing three columns: Name, Grade and Mark. Input Format. 7880 and lat_n < 137. with cte as ( select * , case when Start_Date <> lag ( End_Date , 1 ) over ( order by Start_Date , End_Date ) then 1 else 0 end as ct from Projects ), proj_id as ( select * , sum ( ct ) over ( rows between unbounded preceding and current row ) as project_id from cte --- 1. Take the HackerRank Certification Test and showcase your knowledge as a HackerRank verified developer. 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. Also Read: HackerRank C Solutions; HackerRank C++ Solutions; HackerRank SQL Solution. Query the number of ocurrences of each The repository is organized as follows: Easy: Beginner-level SQL challenges. ; Isosceles: It’s a triangle with 2 sides of equal length. The solution is correct. 1 Dynamic Scoring. You switched accounts on another tab or window. Problem; Solution – Symmetric Pairs in SQL. CodeRankGPT helps you solve HackerRank coding problems during your coding interview. GROUP BY HACKER_ID ORDER BY COUNT (SUBMISSION_ID) DESC, HACKER_ID LIMIT 1) Hello coders, today we are going to solve Symmetric Pairs HackerRank Solution in SQL. 74%. Basic SQL Queries Contribute to BlakeBrown/HackerRank-Solutions development by creating an account on GitHub. Solutions. Before You Launch. Easy SQL (Advanced) Max Score: 25 Success Rate: 96. Table of Contents. Revising the Select Query I; 2. ; These concepts require a deeper understanding of SQL and its ecosystem. Reason: Window functions provide powerful tools for performing Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. - adminazhar/-hackerrank-SQL-intermediate-skills-certification-test-solution Problem. Enter your query here and Solutions to HackerRank practice, tutorials and interview preparation problems with Python, SQL, C# and JavaScript - nathan-abela/HackerRank-Solutions In this HackerRank Functions in SQL problem solution, 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. Easy SQL (Advanced) Max Score: 25 Success Rate: 97. - 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. Each solution is crafted to address a specific SQL problem from the HackerRank SQL challenge set, covering various aspects of SQL including querying, joins, aggregations, and more. This tutorial is only for Educational and Learning Purpose. 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. I hope Disclaimer: The above Problem (Weather Observation Station 8) is generated by Hacker Rank but the Solution is Provided by CodingBroz. 0 | Permalink. Japanese Cities’ Attributes; 6. Disclaimer: The above Problem (Weather Observation Station 9) is generated by Hacker Rank but the Solution is Provided by CodingBroz. ; Hard: Advanced-level SQL challenges. Order your output in descending order by the total number of challenges in which the hacker In this post, we will be covering all the solutions to SQL on the HackerRank platform. 3 weeks ago + 0 comments-- MS SQL Server. 92%. Solution – Draw The Triangle 2 in SQL MySQL set @row := 0; select repeat('* ', @row := @row + 1) from information_schema. Order your output by ascending Write a query to list the contestants ranked in the top 3 for each contest. Write a query to print the hacker_id, name, and total score of the hackers ordered by the descending score. Blame. Now, Samantha’s best friend got offered a higher salary than her at 11. sql files for the solutions I submitted! Pivot the Occupation column so the Name of each person in OCCUPATIONS is displayed underneath their respective Occupation. Reload to refresh your session. Problem. Visit the website for more information. 3 lines (3 loc) · 209 Bytes. SQL (Basic) SQL (Intermediate) SQL The Merit Rewards SQL problem is a question presented in the HackerRank Basic SQL Certification exam. Activities involved: Writing and using subqueries in SELECT, FROM, WHERE clauses. Solution – Weather Observation Station 13 in SQL MySQL select round(sum(lat_n), 4) from station where lat_n > 38. Contains solved This repository contains my SQL solutions to HackerRank challenges, organized by difficulty level: Easy, Medium, and Hard. This was curated after solving all 58 questions, and achieving a score of 1130 points (WR1) My solutions to SQL problems on HackerRank; 1. 2. Hackers Table . Crack your coding interview and get hired. Domains. SQL Basic Queries. Hard SQL (Advanced) Max Score: 50 Success Rate: 78. mysql. The CITY table is described as follows: Field: Type: ID: NUMBER: NAME: VARCHAR2(17) COUNTRYCODE: VARCHAR2(3) DISTRICT: Problem. Solution: select * from CITY 2) Select by ID Problem: Query all columns Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. Sample Output 0. Hi i excited tell about SQL basic queries that using for databases In the past few days, I finally completed all the SQL questions on HackerRank. Contribute to karunakaran186/Sql-intermediate-hackerrank-solutions development by creating an account on GitHub. Enterprises Small and medium teams Startups By use case. I provided sql queries for provided 58 SQL problems in Hacker Rank. Unsolved. 95%. Pivot the Occupation column in OCCUPATIONS so that each Name is sorted alphabetically and displayed underneath its corresponding Occupation. , MySQL, PostgreSQL) and connect to it using a SQL client. This repository contains MYSQL solutions of HackerRank-SQL-Intermediate-Certificate problems which I encountered during the test . community/Thanks for watching us Dev19🖤 Hello coders, today we are going to solve Japan Population HackerRank Solution in SQL. 3. Sample Input 0. Revising the Select Query I. Draw The Triangle 2. where LAT_N is the northern latitude and LONG_W is the western longitude. This is one question solution to the HackerRank SQL Basic Certification problem and this is shared for your increasing knowledge. They are necessary for optimizing performance, managing complex queries, ensuring data integrity, and leveraging advanced features for high-level query design and development. Take the HackerRank Skills Test. SQL (Basic) SQL (Intermediate) Solution – Japanese Cities’ Names in SQL SELECT NAME FROM CITY WHERE COUNTRYCODE = "JPN"; Description: The above Problem (Japanese Cities’ Names) is generated by Hacker Rank but the Solution is Provided by CodingBroz. Hello coders, today we are going to solve Select All Hacker Rank Solution in SQL. Why this video is 7. Samantha interviews many candidates from different colleges using coding challenges and contests. Curate this topic Add this topic to your repo To associate your repository with Problem. Learn how to use them effectively with the OVER() clause, including the ORDER BY and PARTITION BY options. Print Prime Numbers. Hackers Table: Contains solved queries for the Hackerrank SQL (Basic) Skills Certification Test 🎓. If multiple contestants have the same score in a contest, they are at the same rank. SQL; Problem Solving Badges. Annotated solutions to HackerRank's SQL domain questions. 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. Medium SQL (Intermediate) Max Score: 40 Success Rate: 93. ; Medium: Intermediate-level SQL challenges. Output one of the following statements for each record in the table: Equilateral: It’s a triangle with 3 sides of equal length. Amber's conglomerate corporation just acquired some new companies. There are many ways to find out the solution, I thought it is the better to understand Disclaimer: The above Problem (SQL Project Planning) is generated by Hacker Rank but the Solution is Provided by CodingBroz. Accelerate your Job Search. Amber’s conglomerate corporation just acquired some new companies. Solution – Weather Observation Station 3 in SQL SELECT DISTINCT CITY FROM STATION WHERE MOD(ID, 2) = 0; Disclaimer: The above Problem (Weather Observation Station 3) is generated by Hacker Rank but the Solution is Provided by CodingBroz. sql & 2. But to make it more simpler, you can use '*' symbol to represent selection of all columns. There are almost always multiple solutions to the same problem. Please check 1. HackerRank-Solutions / SQL / 5_Advanced Join / 5_15 Days of Learning SQL / 15 Days of Learning SQL. SELECT DISTINCT city FROM station WHERE REGEXP_LIKE(city, '^[AEIOUaeiou]'); 0 | Write a query identifying the type of each record in the TRIANGLES table using its three side lengths. roll_number, std. ; Scalene: It’s a triangle with 3 sides of differing lengths. sql files for the solutions I Contribute to RodneyShag/HackerRank_solutions development by creating an account on GitHub. Problem; Input Format; (Population Census) is generated by Hacker Rank but the Solution is Provided by CodingBroz. HackerRank_solutions / SQL / Basic Join / The Report. ; Isosceles: It's a Medium SQL (Intermediate) Max Score: 30 Success Rate: 93. This collection serves as a useful resource for improving SQL skills and problem-solving techniques. Skill over pedigree. The report must be in descending order by grade — i. - mahedei/Hackerrank-SQL-Intemediate-Skills-Certification-Test-Solutions Solution – Revising the Select Query I MYSQL SELECT * FROM CITY WHERE COUNTRYCODE = 'USA' AND POPULATION > 100000; Disclaimer: The above Problem (Revising the Select Query I) is generated by Hacker Rank but the Verify your SQL Skills. - adminazhar/hackerrank-SQL-basic-skills-certification-test-solution Solution – Binary Tree Nodes in SQL MySQL SELECT N, IF(P IS NULL,"Root",IF((SELECT COUNT(*) FROM BST WHERE P=B. Contest Leaderboard. Editorial. Query all columns for all American cities in the CITY table with populations larger than 100000. 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 SQL (Intermediate) Max Score: 30 Success Rate: 92. Query all columns (attributes) for every row in the CITY table. Unless stated in the file, queries are written in MySQL. File metadata and controls. MySQL; (Japan Population) is generated by Hacker Rank but the Solution is Provided by CodingBroz. 1 month ago + 0 comments. SQL (Basic) SQL (Intermediate) STATION. These tutorials are only for Educational and Learning Purpose. x=b. SQL (Basic) SQL (Intermediate) SQL Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Solution – Weather Observation Station 4 in SQL SELECT COUNT(CITY) - COUNT(DISTINCT CITY) FROM STATION; Disclaimer: The above Problem (Weather Observation Station 4) is generated by Hacker Rank but the Solution is provided by CodingBroz. Hello coders, today we are going to solve 15 Days of Learning SQL HackerRank Solution in SQL. MySQL; Problem. Each solution is designed to demonstrate various SQL techniques Contains solved queries for the Hackerrank SQL (Basic) Skills Certification Test 🎓. Write a query to print the contest_id Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Submissions. Remote Hiring; I have used MySQL and MS SQL Server for the solutions. instagram. Create a HackerRank account Hacker rank SQL intermediate solution. Draw The Triangle 1. Get the number of challenges completed by everyone, ranked from most completed to least WITH challenge_counts AS ( SELECT hacker_id, COUNT(challenge_id) as challenge_count, RANK() OVER (ORDER BY COUNT(challenge_id) DESC) as rank FROM challenges GROUP BY hacker_id ), --- 2. SQL (Basic) SQL (Intermediate) SQL (Advanced Solution – Employee Names in SQL MySQL SELECT name FROM employee ORDER BY name; Disclaimer: The above Problem (Employee Names) is generated by Hacker Rank but the Solution is Provided by CodingBroz. Devrim Ozcay. y=b. sql. Problem Descriptions. Their maximum score will vary based on how submissions for that particular challenge perform. e. com practice problems using Python 3, С++ and Oracle SQL - marinskiy/HackerrankPractice These are the most common problems we encounter while integrating the Traffic Rider SQL to look into the matter. 4 of 6; Test your code You can compile your code and test it for errors and accuracy before submitting. This tutorial is only for Educational and Learning Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Order Hackers: The hacker_id is the id of the hacker, and name is the name of the hacker. Hackers Table Query the median of Northern Latitudes in STATION and round to 4 decimal places. 40%. 4. Related Hackers: The hacker_id is the id of the hacker, and name is the name of the hacker. 5 hours long? Because Im solving ALL of the SQL Problems on Hackerrank in this video. Discussions. Sample Input 1. Placements. Challenges: The challenge_id is the id of the challenge, and hacker_id is the id of the student who created the challenge. - HackerRank-SQL/Occupations. Write a query to print the respective hacker_id and name of hackers who achieved full scores for more than one challenge. 12; Scarlet’s best friend got Contains solved queries for the Hackerrank SQL (Intermediate) Skills Certification Test 🎓. Query the two cities in STATION with the shortest and longest CITY names, as well as their respective lengths (i. 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. Medium SQL (Intermediate) Max Score: 20 Success Rate: 96. Samantha Julia Scarlet Explanation. 317 efficient solutions to HackerRank problems. Unions-This competency includes using unions to display multiple sets of information in the same report. Please check 1. 1. If there is more than one smallest or largest city, choose the one that comes first when Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. This competency area includes the understanding of basic concepts like Blocks, Variable Declaration, and Cursor. Code. 55; Julia’s best friend got offered a higher salary than her at 12. SELECT CEILING(AVG(SALARY - CAST(REPLACE(CAST(SALARY AS VARCHAR(10)), '0', '') AS float))) FROM EMPLOYEES Your code evaluator returns 2253. Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. These solutions can be used as a reference for other learners or as a way to practice and improve SQL skills. 3. Sample Input. 99%. Solutions By company size. New Companies. Each solution includes a brief explanation of the problem and my approach to solving it. Related You signed in with another tab or window. y group by a. : enclosed in parentheses). In. 5 of 6; Submit to see results When you're ready, submit your solution! Remember, you can go back and refine your code anytime. tymoshchuk_teti1. Solved. 7 hours ago + 0 comments. sql at master · raleighlittles/HackerRank-SQL This repository contains my SQL solutions to HackerRank challenges, organized by difficulty: Easy, Medium, and Hard. Basic Select Challenges. Challenges Table . HackerRank is a platform for competitive coding. For some challenges, we are introducing a new beta dynamic scoring pattern. sql at master · Shounok/hackerrank-sql-solutions Category: Hard(Advanced SQL Joins). For example: AnActorName(A), ADoctorName(D), AProfessorName(P), and ASingerName(S). SQL (Basic) SQL (Intermediate) Code your solution in our custom editor or code in your own environment and upload your solution as a file. Medium SQL (Advanced) Max Score: 40 Success Rate: 93. We define an employee’s total earnings to be their monthly salary x months worked, and the maximum total earnings to be the maximum total earnings for any employee in the Employee table. Nerves can peak during the programming test, and even experienced developers might blank Understand Window Functions: Functions like RANK(), DENSE_RANK() and ROW_NUMBER(). Medium SQL (Intermediate) Max Score: 30 Success Rate: 97. Please follow us https://www. Copy path. These are not the only solutions. Output one of the following statements for each record in the table: Equilateral: It's a triangle with sides of equal length. Customer Spending. 82%. x, a. y from functions a join functions b on a. 21283 Angela 6 88255 Patrick 5 96196 Lisa 1. Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. 1 There is a bug in your SQL Server code evaluator. Julia conducted a days of learning SQL contest. Introduction to SQL. I have also earned a 5-star badge on HackerRank for SQL, Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Customer_spending. 66%. Write a query identifying the type of each record in the TRIANGLES table using its three side lengths. y having (count(*)>1 and a. Sample Output. Select all; 4. Ketty doesn’t want the NAMES of those students who received a grade lower than 8. Easy Solution Using Window Functions : Lag,Aggregation Great Question indeed . This work contains my solutions for Hacker Rank SQL questions. Problem; Solution – Select All in SQL; Problem. Leaderboard. 1) Revising ALL Problem: Query all columns (attributes) for every row in the CITY table. SQL (Basic) SQL (Intermediate) SQL Medium SQL (Intermediate) Max Score: 20 Success Rate: 96. Disclaimer: The above Problem (Draw The Triangle 2) is generated by Hacker Rank but the Solution is Provided by CodingBroz. Disclaimer: The above Python Problems are generated by Hacker Rank but the Solutions are Provided by CodingBroz. 2345; HackerRank SQL Problems and Solutions — 1. x=a. Example Task: Install a relational database (e. Select by ID; 5. 06%. SQL (Basic) SQL (Intermediate) SQL This repository contains MySQL solutions of the HackerRank-SQL-Intermediate-Certificate problems which I encountered during the test. This is the only video you will need to improve you where LAT_N is the northern latitude and LONG_W is the western longitude. Note: Print NULL when there are no more names corresponding to an occupation. - Cyberoctane29 My solutions to SQL problems on HackerRank # SQL Problems Page: https://www. SQL Project Planning. 50%. 6 of 6 💛 (Updating Mode) HackerRank Solutions For Python, SQL, C++ - sarangiWijemanna/Hacker-Rank-Solutions Names of columns in the City Table. x and a. Top. Suspicious transactions are defined as: a series of two or more transactions occur at intervals of an hour or less they are from the same sender the sum of transactions in Solution – The Blunder in SQL MySQL SELECT CEIL(AVG(Salary)-AVG(REPLACE(Salary,'0',''))) FROM EMPLOYEES. Solve Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. Solution – Japanese Cities’ Attributes in SQL SELECT * FROM CITY WHERE COUNTRYCODE = "JPN"; Disclaimer: The above Problem (Japanese Cities’ Attributes) is generated by Hacker Rank but the Solution is Provided by CodingBroz. The start date of the contest was March 01, 2016 and the end date was March 15, 170+ solutions to Hackerrank. Set Up Your Skills Strategy; Showcase Your Tech Brand; Optimize Your Hiring Process; Mobilize Your Internal Talent; Use Cases. 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. 65%. These Contain Some SQL Programming Solution of Hacker Rank😏 Add a description, image, and links to the hackerrank-sql-solutions-oracle topic page so that developers can more easily learn about it. 19. What We Do. g. Sep 15, 2024. Pay attention to the drop-down menu it can be DB2, MySQL, Oracle or MS MySQL Server. issacjohnson. select case when a+b > c and b+c > a and a+c > b then case when a=b and b=c and a=c then 'equilateral' when a=b or b=c or a=c then 'isosceles' when a<>b and b<>c and a<>c then 'scalene' end else 'not a triangle' end as type_of_triangle from triangles; Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Subqueries and Nested Queries. The OCCUPATIONS Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. 0 rather than 2253, so it is marked as an incorrect answer. They are essential for building more sophisticated and robust queries, managing data relationships, and optimizing query performance. Related Hello coders, today we are going to solve Population Census HackerRank Solution in SQL. The output column headers should be Doctor, Professor, Singer, and Actor, respectively. Problem 1. As part of a cryptocurrency trade monitoring platform create a query to return a list of suspicious transactions. Medium SQL (Intermediate) Max Score: 30 Success Rate: 93. Medium SQL (Intermediate) Max Score: 40 Success Rate: 97. Packages. Problem statement: Samantha interviews many candidates from different colleges using coding challenges and contests. Raw. 03%. by. Find all the solutions of HackerRank SQL problems in a systematic and structured way. DevSecOps DevOps CI/CD View all use cases By industry Student Advisor. Status. recency | 4676 Discussions| Please Login in order to post a comment. Submissions: The submission_id is the id of the submission, hacker_id is the id of the hacker who made the submission, challenge_id is the id of the challenge for which the submission belongs to, and score is the score of the submission. ; Advanced: Expert-level problems and more complex queries. We use cookies to ensure you have the best browsing experience on our website. This tutorial is only for I have used MySQL and MS SQL Server for the solutions. This repository contains my solutions to various SQL challenges on HackerRank, organized by categories and difficulty levels. Please read our select a. This repository contains solutions for Hacker Rank SQL problems. Ollivander's Inventory. Complex joins-This competency includes using INNER, LEFT, RIGHT, and FULL joins on multiple tables and using joins for many-to-many relationships. Verify your SQL Skills. name . Subqueries-This competency includes using data based on information returned from a different query. vcey qht hgnqc wjneqo zaz kncbp smpx arzfxf bbpqpt yfvdo