Hackerrank sql. We use cookies to ensure you have .

Hackerrank sql We use cookies to ensure you Query CITY names that start AND end with vowels. Follow the steps to set up your environment, write your query, test your code, and submit your answer. Subdomains. Print Prime Numbers. recency | 486 Discussions| Please Login in order to post a comment. Overview. Medium SQL (Intermediate) Max Score: 40 Success Rate: 95. id , WP . Submissions. 60%. 1 Star - Bronze. Alternative Queries. SQL SERVER (Alternative of distinct) HackerRank SQL Solutions This repository contains solutions to various SQL challenges and problems solved on HackerRank. Create a HackerRank account HackerRank SQL Problems and Solutions — 1. 39%. these errors. Revising the Select Query I – HackerRank Solution Verify your SQL Skills. where LAT_N is the northern latitude and LONG_W is the western longitude. These concepts require a deeper understanding of SQL and its ecosystem. Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. 2345, rounded to 4 decimal places. 50%. 450. Medium SQL (Advanced) Max Score: 40 Success Rate: 93. The PADS. Before You Launch. It will be updated everyday. We use cookies to ensure you SQL. Test your SQL skills with HackerRank, a platform for coding challenges and interviews. COUNT (DISTINCT city) count the number of row in which has the city column but did not count that row in which the city value is repeated. We use cookies to ensure you have the best Introduction to SQL. The solutions of all the SQL challenges for all easy, medium and hard challenges on HackerRank executed on MySQL environment. Join over 16 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. We use cookies to ensure you Easy SQL (Advanced) Max Score: 25 Success Rate: 97. The OCCUPATIONS SQL. 66%. Contribute to katehee/HackerRank-SQL-certificate development by creating an account on GitHub. 04%. We use cookies to ensure you Write a query to print the sum of LAT_N and the sum of LONG_W separated by space, rounded to 2 decimal places. power ORDER BY W . 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. power DESC ) AS RowNumber FROM Wands W WITH ( NOLOCK ) INNER JOIN Wands_Property WP WITH ( NOLOCK ) ON W . 06%. Also, a full solution without the need to change modes was posted by @dougal_michael below, which uses the MIN() function instead. 1 watching. Oracle SQL specifically. sql at master · Shounok/hackerrank-sql-solutions SQL. 15 Days of Learning SQL. SQL (Basic) SQL (Intermediate) SQL (Advanced) Difficulty. prakulbagchi. Medium SQL (Intermediate) Max Score: 20 Success Rate: 96. SQL. 2 Star - Bronze. I hope this Query the two cities in STATION with the shortest and longest CITY names, as well as their respective lengths (i. Devrim Ozcay. Hard SQL (Intermediate) Max Score: 50 Success Rate: 85. ChatGPT. select name from city where population>120000 and countrycode ='usa'; SQL (Intermediate) SQL (Advanced) Difficulty. Medium SQL (Intermediate) Max Score: 30 Success Rate: 96. e. Packages contains two columns: ID and Salary (offered salary in $ thousands per month). Solve problems related to drawing triangles, printing prime numbers and more on HackerRank. Unsolved. Query the NAME field for all American cities in the CITY table with populations larger than 120000. Medium. The STATION table is described as follows:. Easy. Revising Aggregations - The Count Function. This is the only video you will need to improve you HackerRank SQL Problems and Solutions — 1. Advanced Select. Weather Observation Station 6. 71%. We use cookies to ensure Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. The report must be in descending order by grade My SQL. Learn how to use them effectively with the OVER They are necessary for optimizing performance, managing complex queries, ensuring data integrity, and leveraging advanced features for high-level query design and development. 0 forks. hacker_id, name ) select hackerid, name, cnt from comp where hackerid not in (select hackerid from comp where cnt in SQL (advanced) certificate . SQL Window Functions with Examples -Part 1. SP2-0734: unknown command beginning "ELSE (SELE" - rest of line ignored. About. Hi i excited tell about SQL basic queries that using for databases SQL (Intermediate) SQL (Advanced) Difficulty. No description, website, or topics provided. Population Census . Medium SQL (Basic) Max Score: 25 Success Rate: 98. Problem Edits: Updated with the sql_mode='' based on @jakab922's comment. We use cookies to in oracle . g. Weather Observation Station 19. com practice problems in C++, python and SQL - IhorVodko/Hackerrank_solutions SQL (Structured Query Language) is a powerful tool used for managing and manipulating relational databases. We use cookies to ensure SQL (Intermediate) SQL (Advanced) Difficulty. 0 | Permalink. hackerrank-sql Star HackerRank is a tech company that focuses on competitive programming challenges for both consumers and businesses, where developers compete by trying to program according to provided specifications. 15%. In this blog post, I’ll be going through Weather Observation Station 6–10. 4 Star - Silver. If you’re new then welcome on board. Sql - Badge Level. These questions not only tested my technical skills but also challenged me to think critically. age , W . We use cookies to Medium SQL (Intermediate) Max Score: 30 Success Rate: 97. kavithasachin26. Students contains three columns ID, Name and Marks. HackerRank SQL Solutions. Aggregation. 0 | Parent Permalink. SP2-0042: unknown command ")" - rest of line ignored. 03%. Select All. They are essential for building more sophisticated and robust queries, managing data relationships, and optimizing query performance. shivanisingh1992. 1 week ago + 0 comments. 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 Write a query to print the shortest and longest length city name along with the length of the city names. Status. Query the list of CITY names from STATION which have vowels (i. 7 hours ago + 0 comments. 175. Amber’s conglomerate corporation just acquired some new companies. recency | 1006 Discussions| Please Login in order to post a comment. countrycode = CO. change to MS SQL SERVER . recency | 2227 Discussions| Please Login in order to post a comment. Ketty gives Eve a task to generate a report containing three columns: Name, Grade and Mark. SQL Basic Queries. , a, e, i, o, or u) from STATION. Tutorial Badges. 82%. Learn about the test format, topics, and benefits of becoming a HackerRank verified developer. Load more conversations. employee_code) AS Total Employee FROM Company C LEFT JOIN Lead_Manager LM ON LM. company_code, C. Harry Potter and his friends are at Ollivander’s with Ron, finally replacing Charlie’s old broken wand. bharathiraja0071. Solved. We use cookies to ensure you have Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. code = WP . Order Welcome to the HackerRank SQL Solutions Repository! This repository contains my solutions to various SQL challenges from HackerRank. , a, e, i, o, and u) as both their My solution in SQL Server: SELECT id , age , coins_needed , power FROM ( SELECT W . We use cookies to Medium SQL (Intermediate) Max Score: 20 Success Rate: 96. Please signup or login in order to view this challenge. : number of characters in the name). 5 Star - Gold. Editorial. The goal of this repository is to document and share SQL queries that I have implemented to solve real-world scenarios and coding challenges. 300. We use cookies to ensure This repository contains all solutions and "thought process" to Hackerrank's SQL challenges. hacker_id) cnt from challenges c inner join hackers h on c. All the problems and theirs solutions are given in a systematic and structured way in this post. Weather Observation Station 18. It is organized into six folders, each containing my solutions for easy, medium and difficult challenges executed in About. We use cookies to ensure you Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. manager_code) AS Total Manager, COUNT(DISTINCT E. Going through them greatly improved my ability Tips for Passing the HackerRank SQL Advanced Certification. 2 days ago + 0 comments. Leaderboard. Easy SQL (Basic) Max Score: 10 Success Rate: 95. They use their knowledge of statistical analysis, data modeling, and data visualization to provide insights that help businesses make informed decisions. 5 hours long? Because Im solving ALL of the SQL Problems on Hackerrank in this video. s2020266050. power , ROW_NUMBER () OVER ( PARTITION BY W . Visit the website for more information. kanyarasit. We use cookies to ensure you have the best Hard SQL (Intermediate) Max Score: 50 Success Rate: 85. Medium SQL (Intermediate) Max Score: 30 Success Rate: 97. We use cookies to ensure you This intermediate SQL solution provides insights into product sales across cities, offering a comprehensive overview of customer spending patterns. Hermione decides the best way to choose is by determining the minimum number of gold galleons needed to buy each non TCS Xplore Hackathon Java - Hackerrank SQL, Unit - Hackerrank Activities - SQL, TCS Xplore Assesment, Know your TCS, Final Assesment Answers, Business Skills, Hackathon Java, Hackerrank Java, AsCEnD Certification Courses, AsCEnD BigData, AsCEnD Datawarehouse, AsCEnD Azure Cloud, AsCEnD Machine Learning, Game of Skills 2020, AsCEnD Angular2 Medium SQL (Intermediate) Max Score: 30 Success Rate: 97. 83%. , MySQL, PostgreSQL) and connect to it using a SQL client. lead_manager_code) AS Total Lead Manager, COUNT(DISTINCT SM. founder, COUNT(DISTINCT LM. We use cookies to Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Pivot the Occupation column in OCCUPATIONS so that each Name is sorted alphabetically and displayed underneath its corresponding Occupation. Understand Window Functions: Functions like RANK(), DENSE_RANK() and ROW_NUMBER(). Revising the Select Query II. Hi i excited tell about SQL basic queries that using for databases Problem. In. Practice You might like to solve practice problems on HackerRank. We use cookies to ensure you Medium SQL (Intermediate) Max Score: 30 Success Rate: 97. Example Task: Install a relational database (e. Let’s begin. 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 SQL. recency | 1420 Discussions| Please Login in order to post a comment. HackerRank SQL Problems and Solutions — 1. We use cookies to ensure you Medium SQL (Intermediate) Max Score: 30 Success Rate: 96. 650. The CountryCode for America is USA. for oracle. Problem 1. 80. to. Revising the Select Query I. The case (uppercase or Test your SQL skills with 15 days of learning and three challenges of different difficulty levels. Problem. Readme Activity. 9 hours ago + 0 comments. You switched accounts on another tab or window. 49%. SP2-0734: unknown command beginning "FROM cte c" - SQL (Intermediate) SQL (Advanced) Difficulty. by. Easy SQL (Advanced) Max Score: 25 Success Rate: 96. We use cookies to Amber's conglomerate corporation just acquired some new companies. We use cookies to ensure you SELECT C. Advanced Join. -- ORACLE SQL. for ms sql SELECT CEILING(AVG(POPULATION)) FROM CITY. Learn how to solve database questions on HackerRank using SQL, MySQL, PostgreSQL, DB2, or Oracle. HackerRank's programming challenges can be solved in a variety of programming languages (including Java, C++, PHP, Python, SQL Why this video is 7. Create a HackerRank account Be part of a oracle: with t1 as ( select level lvl from dual connect by level <= 20 order by level desc ) select rpad('* ', lvl*2, '* ') from t1; Query all columns for every row in a table. senior_manager_code) AS Total Senior Manager, COUNT(DISTINCT M. So, without wasting any time, let’s jump to the solutions. By detailing sales figures per city and identifying customers who spent 25% or less than the average, this solution aids in strategic decision-making for optimizing sales and customer engagement. Info; Rules; Scoring Welcome to the HackerRank SQL Challenges Solutions repository! This repository contains my solutions to all the HackerRank SQL Practice Questions. Query all columns (attributes) for every row in the CITY table. select round (AVG(population)) from CITY ; 0 | Permalink. 3 hours ago + 0 comments. Write a query to output the names of those students whose best friends got offered a higher SQL. continent, round(avg(C. Input Format. Print the total number of challenges created by hackers. recency | 2374 Discussions| Please Login in order to post a comment. Top Competitors. We use cookies to ensure you have the SQL (Intermediate) SQL (Advanced) Difficulty. I do not own or make these questions. Accelerate your Job Search. Reload to refresh your session. hacker_id as hackerid, name, count(c. Query the list of CITY names starting with vowels (i. We use cookies to ensure you Medium SQL (Intermediate) Max Score: 20 Success Rate: 96. We use cookies to ensure you have the best Medium SQL (Intermediate) Max Score: 30 Success Rate: 96. Sep 15, 2024. Starts in. 65%. Basic SQL Queries SQL. Discussions. coins_needed , W . We use cookies to Hard SQL (Intermediate) Max Score: 50 Success Rate: 85. We use cookies to ensure you have the best SQL (Intermediate) SQL (Advanced) Difficulty. population),0) from city C join country CO on C. Ketty doesn't want the NAMES of those students who received a grade lower than 8. Japanese Cities' Names. Basic Select. Employee Names. You are given two tables: Students and Grades. Friends contains two columns: ID and Friend_ID (ID of the ONLY best friend). There are a total of 58 problems of varying difficulty level that test different concepts. We use cookies to ensure You signed in with another tab or window. They are essential for building more sophisticated and robust queries, managing data relationships, and In this post, I’ll share my solutions to some SQL problems on HackerRank, categorized as “Easy. Hard SQL (Advanced) Max Score: 50 Success Rate: 78. Query the details of the city with ID 1661. The README file provides problem descriptions, solution approaches, and notes for each file. The CITY table is described as follows: Author. Note: Print NULL when there are no more names corresponding to an occupation. presents. thank you so much! really helped. We use cookies to ensure you have the best Medium SQL (Intermediate) Max Score: 20 Success Rate: 96. We use cookies to ensure you have the best Hard SQL (Advanced) Max Score: 50 Success Rate: 78. We use cookies to ensure 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 Hello coders, in this post you will get all the solution of HackerRank SQL Solutions. New Companies. The COUNTRYCODE for Japan is JPN. This query works in sql developer and doesn't work in hackerrank with . Resources. Binary Tree Nodes. Activities involved: Setting up a database environment and understanding SQL’s purpose and use cases. Lists. Though many experts are attempting to resolve the problem, none of The repository dedicated to solutions for Hacker-rank Database problems, solved with MySQL - hackerrank-sql-solutions/The PADS. If the city name is repeated in any row that also be counted . Your result Effective solutions to hackerrank. The table we’ll be using is the station table shown below: Problem. We use cookies to ensure you have Medium SQL (Intermediate) Max Score: 30 Success Rate: 96. recency | 809 Discussions| Please Login in order to post a comment. Stars. Reason: Fundamental setup and understanding are necessary to start writing SQL queries. 99%. For example, if there are three records in the table with CITY values 'New York', 'New York', 'Bengalaru', there are 2 different city Easy SQL (Advanced) Max Score: 25 Success Rate: 97. You are registered for the contest. Skills SQL (Intermediate) SQL (Advanced) Difficulty. Points Needed. Easy SQL (Basic) Max Score: 10 Success Rate: 99. 14%. Forks. select distinct city from station where NOT (REGEXP_LIKE(SUBSTR(CITY, 1, 1), '^[AEIOUaeiou]') AND REGEXP_LIKE(SUBSTR(CITY, -1, 1), '[AEIOUaeiou]$')) order by city; The solution pass the test but In my solutions i have several problems : Create a HackerRank account Be part of a 23 million-strong community of Why doesn't below query works for sql server ? select distinct city from station where not city like '[aeiou]%[aeiou]'; 0 | Permalink. Write a query to output the start and end dates of projects listed by the number of days it took to complete the project in ascending order. company_code Verify your SQL Skills. Basic Join. You signed out in another tab or window. SQL (Intermediate) SQL (Advanced) Difficulty. 57%. The output column headers should be Doctor, Professor, Singer, and Actor, respectively. You can tell your friends about SQL. 02%. Skills. hacker_id=h. Sort by. They are necessary for optimizing performance, managing complex queries, ensuring data integrity, and leveraging advanced features for Join over 16 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. 2 weeks ago + 0 comments. Solve Challenge. tried this in oracle: with comp as ( select c. This repository contains SQL queries for various problems solved on HackerRank. HackerRank changed the default sql_mode behavior to only_full_group_by at some point after I posted this. 48%. African Cities. Shaloo Mathew. 98%. We use cookies to ensure you have the best browsing experience on our website. Grades contains the following data:. Weather Observation Station 8. 21 stories SQL. Query the names of all the Japanese cities in the CITY table. Greetings! Welcome back to the Hackerrank SQL guide. Easy SQL (Basic) Max Score: 10 Success Rate: 98. code , W . nguyenx8student. We use cookies to SQL (Intermediate) SQL (Advanced) Difficulty. Hackerrank is a great platform to practice SQL queries. These concepts introduce more complex features and functionalities of SQL. This ultimate guide is a complete overview of the types of SQL Join over 11 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Draw The Triangle 1. Create a HackerRank account Be part of a 23 million-strong community of developers. We use cookies to ensure you Pivot the Occupation column so the Name of each person in OCCUPATIONS is displayed underneath their respective Occupation. recency | 899 Discussions| Please Login in order to post a comment. Weather Observation Station 16. We use cookies to Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. Create a HackerRank account Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. tnguyen29. 95%. Watchers. Please read our cookie policy for Explore HackerRank SQL Solutions, a robust resource offering a diverse array of practical challenges and expert solutions to bolster your SQL proficiency and database querying skills. We use cookies to ensure you have the best Query the list of CITY names ending with vowels (a, e, i, o, u) from STATION. Links to the first part and second parts in this series can be found here: Part I and Part II. recency | 499 Discussions| Please Login in order to post a comment. Create a HackerRank account The HackerRank SQL Advanced Certification is a great way to showcase your SQL expertise. Blog; Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. 68%. akshithalachu68. Population Density Difference. Draw The Triangle 2. Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. Students contains two columns: ID and Name. Weather Observation Station 20. . COUNT(city) will count the number of row If it has city column and has value. COUNT is the aggregate Funtion that used to count the number of rows in a table. My SQL select distinct CITY from STATION Where SUBSTR(CITY, LENGTH(CITY), 1) NOT IN ('a','e','i','o','u'); Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. mysql sql hackerrank learning-exercise hackerrank-solutions hackerrank-sql hackerrank-sql-challenge upskilling certify-maintenance hackerrank-sql-certificate find users who submitted a query every day. 74%. Data analysts are responsible for collecting, analyzing, and interpreting large datasets to identify patterns and trends. Medium SQL (Basic) Max Score: 30 Success Rate: 93. Choose from different levels of difficulty and topics, such as select query, join, and weather observation Take a 30-minute test to verify your SQL skills and get highlighted to companies. find total number of view, total number of unique views, total number of submissions and total number of accepted submissions. Create a HackerRank account Medium SQL (Intermediate) Max Score: 30 Success Rate: 97. We use cookies to ensure you select city from station where city like 'A%' or city like 'E%' or city like 'I%' or city like 'O%' or city like 'U%'; Query the Western Longitude for the largest Northern Latitude under 137. We use cookies to ensure you Problem. 4 weeks ago + 0 comments. SELECT DISTINCT(CITY) FROM STATION WHERE MOD (ID,2) = 0; 1 | Permalink. We use cookies to ensure you These are the most common problems we encounter while integrating the Traffic Rider SQL to look into the matter. woxinweilan. hacker_id group by c. We use cookies to ensure you have Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. You are given three tables: Students, Friends and Packages. I DID THE SAME THING HACKERRANK MF IS SHOWING COMPLIATION ERROR . select CO. 85%. 97%. 3 Star - Silver. Whether we are beginners or experienced professionals, practicing SQL exercises is important for improving HackerRank SQL Problems and Solutions — 1. recency | 5292 Discussions| Please Login in order to post a comment. Hard. 0 stars. recency | 850 Discussions| Please Login in order to post a comment. We use cookies to ensure you SQL (Intermediate) SQL (Advanced) Difficulty. ” I used the MySQL option on the platform to solve each of the challenges. code group by continent ; 0 | Parent Permalink. We use cookies to ensure SQL. If there is more than one smallest or largest city, choose the one that comes first when Find the difference between the total number of CITY entries in the table and the number of distinct CITY entries in the table. Tweet it Share it. pkns akn oiruv hgava fjnkm vgb zwy mzeyf kak pqhtd