Hackerrank sql. You can tell your friends about SQL.

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