Sql in hackerrank. hacker_id, name from ( Select j.

Sql in hackerrank Output one of the following statements for each record in the table: 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. The goal of this repository is to document and share SQL queries that I have implemented to solve real-world scenarios and coding challenges. e. , a, e, i, o, or u) from STATION. Activities involved: Writing SELECT statements, filtering results with WHERE Hackerrank is a great platform to practice SQL queries. Return all customers from 'Germany', 'France', or 'UK' SELECT * FROM Customers WHERE Country IN Print the total number of challenges created by hackers. Hackerrank's mysql version is old; too old to support CTEs. hacker_id, COUNT(DISTINCT j. Approaching it the right way, everyone with basic Easy SQL (Advanced) Max Score: 25 Success Rate: 97. select round (AVG(population)) from CITY ; 0 | Permalink. Hard SQL (Advanced) Max Score: 50 Success Rate: 78. You are given two tables: Students and Grades. Weather Observation Station 18. recency | 850 Discussions| Please Login in order to post a comment. The IN operator is a shorthand for multiple OR conditions. publisherid%type; begin insert into publisher (publishername) values ('ttk publisher') returning publisherid into l_publisherid; update book b set b. Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. So, without wasting any time, let’s jump to the Problem. Discussions. Preparation Kits View all kits. Students contains three columns ID, Name and Marks. Annotated solutions to HackerRank's SQL domain questions. Weather Observation Station 20. Pivot the Occupation column in OCCUPATIONS so that each Name is sorted alphabetically and displayed underneath its corresponding Occupation. English. You switched accounts on another tab or window. We use cookies to ensure HackerRank and LeetCode both have vastly improved their SQL content recently. tried this in oracle: with comp as ( select c. We use cookies to ensure you These concepts require a deeper understanding of SQL and its ecosystem. Basic Join. Example Task: Install a relational database (e. If the End_Date of HackerRank concepts & solutions. We use cookies to Problem. 5 hours long? Because Im solving ALL of the SQL Problems on Hackerrank in this video. Order your output by the last three SQL. 48%. We use cookies to ensure you SQL is a standard language for storing, manipulating and retrieving data in databases. It is guaranteed that the difference between the End_Date and the Start_Date is equal to 1 day for each row in the table. Adi HackerRank SQL Problems and Solutions — 1. SQL can be less boring, of course, when you are doing challenging coding problems on sites like HackerRank or LeetCode. Write a query to find the maximum total earnings for all 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. SELECT CEIL((AVG(salary)) - (AVG(REPLACE(salary, '0', '')))) AS avg_salary FROM employees; That is why i provided the whole solution and clarification to the hackerrank problem in SQL server. We use cookies to ensure you have the best SQL (Intermediate) SQL (Advanced) Difficulty. ; Isosceles: It's Greetings! Welcome back to the Hackerrank SQL guide. It is very important that you all first give it SQL (Intermediate) SQL (Advanced) Difficulty. Please checkout my solutions and make use of it for the learning purpose Medium SQL (Intermediate) Max Score: 20 Success Rate: 96. I think if j1mbl3s will read the hackerrank problem statement once, this solution 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; Problem. Accelerate your Job Search. Why doesn't below query works for sql server ? select distinct city from station where not city like '[aeiou]%[aeiou]'; 0 | Permalink. 76%. countrycode = CO. We use cookies to ensure you have SQL (Intermediate) SQL (Advanced) Difficulty. Weather Observation Station 6. Query the list of CITY names starting with vowels (i. What you'll learn. 85%. Query all columns. 4 weeks ago + 0 comments. We use cookies to ensure you have @Tanishka Now that Alex as cracked how to run PL/SQL on Hackerrank, you could improve the answer by removing the whole DECLARE section, because your loops implicitly declare i and j so the ones at the top SQL. HackerRank changed the default sql_mode behavior to only_full_group_by at some point after I posted this. If so, my solution should work fine, I even checked it today by inserting the code to the hackerrank's code editor and it passed the sample test case. Blog; Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Links to the first part and second parts in this series can be found here: Part I and Part II. Friends contains two columns: ID and Friend_ID (ID of the ONLY best friend). Weather Observation Station 4 | Easy | HackerRank Find the difference between the total number of CITY entries in the table and the number of distinct CITY entries in the table. 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 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. Thanks for stopping by! Hard SQL (Intermediate) Max Score: 50 Success Rate: 85. Easy SQL (Basic) Max Score: 10 Success Rate: 99. hacker_id group by c. SQL. recency | 1006 Discussions| Please Login in order to post a comment. challenge_id) as cnt from ( Select s. Editorial. Return to all comments → The Problem You are given a table, Projects, containing three columns: Task_ID, Start_Date, and End_Date. 175. Basic Select. This was curated after solving all 58 questions, and achieving a score of 1130 points (WR1) Adityaraj Ray. . Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. You are viewing a single comment's thread. Challenges: 21, Attempts: 1019923, Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Going through them greatly Hard SQL (Intermediate) Max Score: 50 Success Rate: 85. We use cookies to ensure you Query the two cities in STATION with the shortest and longest CITY names, as well as their respective lengths (i. 1 Week Preparation Kit. Status. You are given three tables: Students, Friends and Packages. Functional Programming. code group by continent ; 0 | Parent Permalink. 68%. HackerRank SQL Certifications. 99%. Hi i excited tell about SQL basic find total number of view, total number of unique views, total number of submissions and total number of accepted submissions. 15 Days of Learning SQL. SQL Query for printing prime numbers. Points Needed. We use cookies to Solve HackerRank problems to get Gold star and 670 points in SQL HackerRank. If there is more than one smallest or largest city, choose the one that comes first 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. It is guaranteed that the difference between the End_Date and SQL. Create a HackerRank account Inside you will find the solutions to all HackerRank SQL Questions. 4. If you’re new then welcome on board. Employee Names. Create a HackerRank account Hello coders, in this post you will get all the solution of HackerRank SQL Solutions. 2345, rounded to 4 decimal places. 82%. Sql - Badge Level. SQL (Intermediate) SQL (Advanced) Difficulty. SQL (Structured Query Language) is a powerful tool used for managing and manipulating relational databases. We use cookies to The various MySQL certifications cover topics such as SQL, data modeling, database administration, connectors, APIs, schema objects, and transactions. hacker_id, name ) select hackerid, name, cnt from comp where hackerid not in (select hackerid from comp where cnt in Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. Amber’s conglomerate corporation just acquired some new companies. Create a HackerRank account Be part of a The SQL IN Operator. change to MS SQL SERVER . Also, a full solution without the need to change modes was posted by @dougal_michael below, which uses the MIN() function instead. hacker_id) cnt from challenges c inner join hackers h on c. The start date of the contest was March 01, 2016 and the end date was March 15, 2016. hacker_id, name from ( Select j. 7 out of 5 4. Medium SQL (Intermediate) Max Score: 30 Success Rate: 96. Query the Western Longitude for the largest Northern Latitude under 137. Draw The Triangle 1. Our SQL tutorial will teach you how to use SQL in: MySQL, SQL Server, MS Access, Oracle, Sybase, Informix, Postgres, and other database systems. We use cookies to Hard SQL (Intermediate) Max Score: 50 Success Rate: 85. We use cookies to Medium SQL (Intermediate) Max Score: 20 Success Rate: 96. Create a HackerRank account Here is the solution (MySQL) for Hackerrank challenge The Blunder. Output one of the following statements for each record in the table: Equilateral: It's a triangle with sides of equal length. We use cookies to ensure HackerRank SQL Solutions. 📚 SQL Interview Areas. Write a query to print total number of 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. Mar 30, 2021. We use cookies to ensure you have the Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. Each solution includes a brief explanation of the problem and my approach to solving it. Please signup or login in order to view this challenge. tymoshchuk_teti1. Solve Challenge. 66%. Write a query to print . Share this post. In this blog post, I’ll be going through Weather Observation Station 6–10. We use cookies to ensure you Current projects at work require more SQL skills, so I took the time to brush up my SQL knowledge using the HackerRank coding challenges platform. Directions: Query the Name of any student in STUDENTS who scored higher than Marks. In. The IN operator allows you to specify multiple values in a WHERE clause. We use cookies to ensure Join over 16 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Lists. 97%. The output is in a "code-ish" format. Sort by. , MySQL, PostgreSQL) and connect to it using a SQL client. 21 stories You signed in with another tab or window. 0 | Permalink. Domains In this post, we will be covering all the solutions to SQL on the HackerRank platform. Unsolved. 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. We use cookies to Julia conducted a days of learning SQL contest. We use cookies to ensure you Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Load more conversations. : enclosed in parentheses). For example: The HackerRank SQL Advanced Certification is a great way to showcase your SQL expertise. We use cookies to ensure Hard SQL (Advanced) Max Score: 50 Success Rate: 78. 4 Star - Silver. Take the HackerRank Certification Test and showcase your knowledge as a HackerRank verified developer. If you’re a data scientist or software engineer on the job market, the ability to demonstrate your database skills in an SQL These concepts introduce more complex features and functionalities of SQL. Each of the companies follows this hierarchy: Given the table schemas below, write a query to print the company_code, founder name, for oracle. hacker_id as hackerid, name, count(c. Grades contains the following data:. Hi i excited tell about SQL basic queries that using for databases Create your HackerRank account and join SQL. 74%. Example. See all from JEN-LI CHEN IN DATA SCIENCE. We use cookies to ensure you have the best Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. Easy SQL (Basic) Max Score: 10 Success Rate: 95. Join over 23 million developers in solving code challenges on HackerRank, one of the best ways SQL. challenge_id = ch. Ketty gives Eve a task to generate a report containing three columns: Name, Grade and In this post, we will be covering all the solutions to SQL on the HackerRank platform. Easy SQL (Advanced) Max Score: 25 Success Rate: 96. challenge_id) j INNER JOIN Difficulty d Problem Statement: Julia conducted a days of learning SQL contest. 650. Use subqueries instead: Select h. African Cities. Area 1 - Basic SQL Queries Interviews can be hands-on, with problems to solve on CoderPad, HackerRank, or even a Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Some companies use tools like Hackerrank to screen, some use it to evaluate talent at a higher level, some use it to build a HackerRank SQL Problems and Solutions — 1. akshithalachu68. Join us Create a HackerRank account Be part of a 23 million-strong community of developers. There are a total of 58 problems of varying difficulty level that test different concepts. Anyway, as we are supposed to print the total number of challenges created by each student the WHERE clause: SQL. Weather Observation Station 16. thank you so much! really helped. Problem 1. Leaderboard. English [Auto] Preview this course. Medium SQL (Intermediate) Max Score: 40 Success Rate: 95. The CountryCode for America is USA. Medium. Table of Contents. We use cookies to Why this video is 7. The thing that bothers me with HackerRank SQL questions is that it doesn't show the SQL queries output properly, like with a table, with the column names etc. 7 (97 ratings) 15,061 students. Hermione decides the best way to choose is by determining the minimum number of gold galleons needed to buy each Medium SQL (Intermediate) Max Score: 30 Success Rate: 96. 1 Star - Bronze. Weather Observation Station 1. Problem; Solution – Print Prime Numbers in SQL | Hacker Rank Solution. We use cookies to ensure Effective solutions to hackerrank. Your result Print the names of employees who earn more than $2000 per month and have worked at the company for less than 10 months. See all from Isabelle. - HackerRank-SQL/Occupations. kavithasachin26. Top Earners. They are essential for building more sophisticated and robust queries, managing data relationships, and optimizing query performance. Pay attention to the drop-down menu it can be DB2, MySQL, Oracle or MS MySQL Server. Rating: 4. SQL Query for printing pattern. The table we’ll be using is the station table shown below: Verify your SQL Skills. : number of characters in the name). Verify your SQL Skills. The STATION table is described as SQL. select name from city where population>120000 and countrycode ='usa'; While solving all SQL problems from HackerRank, I came across multiple solutions for the same problem. 3 Star - Silver. HackerRank offers an SQL SQL. 15%. 2 days ago + 0 comments. Binary Tree Nodes. MySQL Server; Problem. population),0) from city C join country CO on C. Student and Friend Salary Report: Insights and Analysis. 0 | Permalink Create a HackerRank account Be Medium SQL (Intermediate) Max Score: 30 Success Rate: 97. Hard SQL (Intermediate) Max Score: 50 Success Rate: 85. New Companies. We use cookies to ensure you have the best browsing experience on our website. Query all columns for all American cities in the CITY table with populations larger than 100000. Start learning SQL now » select city from station where city like 'A%' or city like 'E%' or city like 'I%' or city like 'O%' or city like 'U%'; These concepts introduce more complex features and functionalities of SQL. 98%. ” I used the MySQL option on the platform to solve each of the challenges. Skills. A median is defined as a number separating the higher half of a data set from the lower These are the most common problems we encounter while integrating the Traffic Rider SQL to look into the matter. You are given a table, Projects, containing three columns: Task_ID, Start_Date and End_Date. Created by Start-Tech Trainings, Start-Tech Academy. SQL Basic Queries. Query the NAME field for all American cities in the CITY table with populations larger than 120000. Subdomains. Mar 31, 2024. select AVG(population) from CITY where district ='California'; Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. by. The output column headers should be Doctor, Professor, Singer, The goal of /r/SQL is to provide a place for interesting and informative SQL content and discussions. To query just the names of all Japanese cities from the CITY table, where the COUNTRYCODE for Japan is 'JPN', you can use the following SQL query: SELECT NAME FROM CITY WHERE CountryCode = 'JPN' ; In this query: - SELECT NAME specifies that you only want to retrieve the NAME field from the CITY table. These concepts require a deeper understanding of SQL and its ecosystem. Easy. for oracle. ChatGPT. Manhattan Distance Calculation SQL Query. Easy SQL (Basic) Max Score: 10 Success Rate: 98. Let’s begin. Whether we are beginners or experienced professionals, practicing SQL exercises is important for for ms sql SELECT CEILING(AVG(POPULATION)) FROM CITY. Reload to refresh your session. Linux Shell. The Name column only contains uppercase (A-Z) and lowercase (a-z) letters. We use cookies to ensure HackerRank SQL Problems and Solutions —2. sql at master · raleighlittles/HackerRank-SQL We define an employee's total earnings to be their monthly worked, and the maximum total earnings to be the maximum total earnings for any employee in the Employee table. We use cookies to ensure you in oracle . Devrim Ozcay. Problem. Get silver and gold rank with 600+ points. Please read our cookie policy for Amber's conglomerate corporation just acquired some new companies. We use cookies to ensure you have the best Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. com practice problems in C++, python and SQL - IhorVodko/Hackerrank_solutions SQL interview questions have been a critical component of technical hiring for decades. Sep 16, 2024. 39%. 71%. Contribute to BlakeBrown/HackerRank-Solutions development by creating an account on GitHub. publisherid = l_publisherid where Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. Visit the website for more information. Skills Write a query identifying the type of each record in the TRIANGLES table using its three side lengths. Please check first if you selected MS SQL Server from the dropdown list. 1 month ago + 0 comments. Sep 15, 2024. bharathiraja0071. Tutorial Badges. These questions not only tested my technical skills but also challenged me to think SQL (Intermediate) SQL (Advanced) Difficulty. 80. continent, round(avg(C. We use cookies to ensure you Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. What you really want to do is test job interview questions Find all the solutions of HackerRank SQL problems in a systematic and structured way. You signed out in another tab or window. But it's still mostly rote syntax that you'll learn. Here are common areas assessed in SQL interviews across data roles. This repository contains my solutions to various SQL challenges on HackerRank, organized by categories and difficulty levels. Databases. This is the only video you will need to improve you Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. Advanced Select. Advanced Join. 06%. -- MS SQL Server. Recommended from Medium. 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. challenge_id from Submissions s INNER JOIN Challenges ch ON s. Students contains two columns: ID and Name. It is very important that you all first give it HackerRank and LeetCode both have vastly improved their SQL content recently. Medium SQL (Basic) Max Score: 25 Success Rate: 98. Binary Tree Node Type Query on HackerRank SQL. Aggregation. Top Competitors. 300. They are necessary for optimizing performance, managing complex queries, ensuring data integrity, and leveraging advanced features for In this HackerRank Functions in SQL problem solution, Write a query identifying the type of each record in the TRIANGLES table using its three side lengths. Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. select CO. Last updated 1/2025. 57%. Harry Potter and his friends are at Ollivander’s with Ron, finally replacing Charlie’s old broken wand. 5 Star - Gold. Return to all comments → SQL. Medium SQL (Advanced) Max Score: 40 Success Rate: 93. Print Prime Numbers. Easy SQL (Advanced) Max Score: 25 Success Rate: 97. SQL (Basic) SQL (Intermediate) SQL (Advanced) Difficulty. Company Details with Employee Counts SQL Query. In this post, I’ll share my solutions to some SQL problems on HackerRank, categorized as “Easy. 65%. Packages contains two columns: ID and Salary Hackerrank’s “The Blunder” SQL problem. 450. I tried to provide those with explanation. 83%. recency | 809 Discussions| Please Login in order to post a comment. Create a HackerRank account HackerRank SQL: Binary Tree Nodes You are given a table, BST, containing two columns: N and P, where N represents the value of a node in Binary Tree, and P is the parent of Mar 19, 2024 19. where LAT_N is the northern latitude and LONG_W is the western Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. 02%. Solved. Create a HackerRank account Be part of a 23 million-strong community of developers. Join over 16 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. I’m trying to get better at SQL querying, so if you see any errors or have any suggestions, I am all ears. 03%. We use cookies to ensure you have That’s all I can share to solve some problems in SQL HackerRank (Difficulaty Easy). 50%. The PADS. select * from CITY;-2 | Permalink. We use cookies to ensure you have Edits: Updated with the sql_mode='' based on @jakab922's comment. hacker_id=h. Submissions. The STATION table is described as follows:. We use cookies to ensure Medium SQL (Intermediate) Max Score: 30 Success Rate: 96. hacker_id, s. Revising the Select Query I. Hopefully it can be understood, if there is a response, please leave it in the Find the difference between the total number of CITY entries in the table and the number of distinct CITY entries in the table. Medium SQL (Intermediate) Max Score: 30 Success Rate: 97. g. Population Census . 2 Star - Bronze. Hard. 7 hours ago + 0 comments. Learn SQL queries, aggregations, joins, subqueries, and more with examples and explanations. shivanisingh1992. Query a list of CITY and STATE from the STATION table. We use cookies to oracle: with t1 as ( select level lvl from dual connect by level <= 20 order by level desc ) select rpad('* ', lvl*2, '* ') from t1; This repository contains solutions to various SQL challenges and problems solved on HackerRank. Revising the Select Query II. Regex. Before You Launch. It took me a bit more Medium SQL (Intermediate) Max Score: 30 Success Rate: 96. Alternative Queries. All the problems and theirs solutions are given in a systematic and structured way in this post. We use cookies to ensure you Medium SQL (Intermediate) Max Score: 20 Success Rate: 96. 95%. 49%. Hello coders, today we are going to solve Print Prime Numbers HackerRank Solution in SQL. We use cookies to SQL (Intermediate) SQL (Advanced) Difficulty. They are necessary for optimizing performance, managing complex queries, ensuring data integrity, and leveraging advanced features for high-level query design and development. score as _score, difficulty_level, s. HackerRank is a platform for competitive coding. We use cookies to ensure you have the best I am trying to run the following code in hackerrank but while running the query I am getting output as ~ no response on stdout ~ set serveroutput on; declare l_publisherid publisher. Write a query to print total number of unique hackers who made at least submission each day Hackerrank is a great platform to practice SQL queries. Though many experts are attempting to resolve the problem, none of HackerRank SQL. goghm dnklzwu sbft tlm ike bpzmy elpwj gllw ddsa kvlh