Hackerrank sql log Expected tokens may include: "JOIN ". It was python and sql. This repository contains solutions to various SQL challenges and problems solved on HackerRank. Regex. No signup required. SELECT CEIL(AVG(salary) - AVG(REPLACE(salary, '0', ''))) FROM employees; Query Breakdown: SELECT: This clause selects the result of the computation. So, without wasting any time, let’s jump to the 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. Draw The Triangle 1. LinkedIn. hacker_id , h. The Report. The output is in a "code-ish" format. Remember me. 71%. Query the median of Northern Latitudes in STATION and round to 4 decimal places. A few questions here - Since SELECT clause is executed before ORDER BY clause, why cann't we use the following query? SELECT Start_Date, MIN(End_Date) as End_Date FROM (SELECT Start_Date FROM Projects WHERE Start_Date NOT IN (SELECT End_Date FROM Projects)) a, (SELECT end_date FROM PROJECTS WHERE end_date NOT IN (SELECT start_date Query a list of unique CITY names with even ID numbers. This does not start with a vowel, and does not end with a vowel. 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. Navigation Menu Toggle navigation. GitHub. Order your output by ascending company_code. I also tried stratascratch and it's all good, everything is as you expect. 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. publisherid = l_publisherid where 📜 License. This is 100% a client-side problem in how the results are displayed. Continue with Google. 66%. percentile_disc is used to find a row in a set of records which is the nth percentile of that set. That is not the same as the problem statement of: "do not start with vowels or do not end with vowels" For example, the word: railway. - The WHERE CountryCode = 'JPN' clause filters the results to include only cities that have the country code 'JPN', which corresponds to Japan. '' and there are two columns named lat_n and long_w. Query list of CITY names from STATION that either do not start with vowels or do not end with vowels. for sql server users, there is a built in function that helps you with percentiles. You can use substring as solution to this question. in oracle . Draw The Triangle 2. View top submissions. hacker_id as hackerid, name, count(c. 74%. Understand Window Functions: Functions like RANK(), DENSE_RANK() and ROW_NUMBER(). 84%. 95%. Revising the Select Query II. hacker_id=h. The PADS. They had to be ranked by some metric. Finding the min or max is an O(n) operation. If we join on anything else other than company code ,we expect that every manager at every hierarchy has subordinate(s) , if theres any level manager with no subordinates, he would be missing from th counts bcz of not matching as per join clause condition . You have not made any submissions for 15 Days of Learning SQL yet. difficulty_level=d. Also, if another entry of different occupation is done then code is to be updated again. */ uncatalog". Find total number of employees. The key is the HAVING line, with two conditions. Print the names of employees who earn more than $2000 per month and have worked at the company for less than 10 months. Submissions. Designers Top selling Most followers Newest designers Most icons Following. tried this in oracle: with comp as ( 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. Easy SQL (Advanced) Max Score: 25 Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. For SQL server / MS sql . Hy vọng nó là kiến thức hữu ích với bạn. Query the Western Longitude for the smallest value of the Northern Latitudes greater than 38. Don't have an account?Sign up Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for Query the data for all American cities with populations larger than 100,000. I don't know how Leetcode is so I can only speak of Hackerrrank. hacker_id, name ) select hackerid, name, cnt from comp where hackerid not in (select hackerid from comp where cnt in Pivot the Occupation column so the Name of each person in OCCUPATIONS is displayed underneath their respective Occupation. SELECT DISTINCT city FROM station WHERE REGEXP_LIKE(city, '^[aeiou]', 'i'); In Oracle, the LIKE operator does not support character classes like [aeiou]. 7780 in STATION and round to 4 decimal places. Tổng kết. It can be done without CTE also, by joining tables only by derived tables. Hard SQL (Advanced) Max Score: 50 Success Rate: 79. Then you could replace the inner loop with dbms_output. 82%. The median is the 50th percentile of any set. Pivot the Occupation column so the Name of each person in OCCUPATIONS is displayed underneath their respective Occupation. Query a count of the number of cities in CITY having a Population larger than 100,000 Input Format The CITY table is described as follows: 2022년 4월 20 Query the city names for all American cities with populations larger than 120,000. Unsolved. SQLSTATE=42601 Demo bài tập SQL level Easy. It is very important that you all first give it a try & brainstorm yourselves before having a Hello coders, in this post you will get all the solution of HackerRank SQL Solutions. Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Here is the schema for table station: Ordering items in a list is an O(n*log(n)) operation. @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 aren't used. Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. It was like 2 hours. Problem. Easy SQL (Basic) Max Score: 20 Success Rate Find the number of duplicate CITY names in STATION. SQL Project Planning. mzzzi. 0 rather than 2253, so it is marked as an incorrect answer. Facebook. Icons Illustrations 3D illustrations Stickers. 48%. find users who submitted a query every day. Easy SQL (Basic) Max Score: 10 Success Rate Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. Visit the website for more information. Easy SQL (Advanced) Max Score: 25 Success Rate: 96. Solve SQL | HackerRank We use cookies to ensure you have the best browsing experience on our website. 49%. log. Query the Manhattan Distance between two points, round or truncate to 4 decimal digits. Print the total number of challenges created by hackers. 03%. 15 Days of Learning SQL. Take your SQL skills to the next level with my latest video! 🚀 In this tutorial, we solve 2 interesting SQL problems from HackerRank, providing clear, step- Query the details of the city with ID 1661. I have also earned a 5-star badge on HackerRank for Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. Solve Challenge. You have not made any submissions for SQL Project Planning yet. It's frustrating. Log In. 4. Subdomains. 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 number of cities having populations larger than 100000. hacker_id as id, count (case when s. Preparation Kits. I'm not in a FAANG company but at a top software company in my country (Norway) working as a Data Engineer. Join us Sign up. I removed the unrelated sql-server tag and added html as a generic guess. Basic Select. To succeed in an SQL oracle: with t1 as ( select level lvl from dual connect by level <= 20 order by level desc ) select rpad('* ', lvl*2, '* ') from t1; 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. score then 1 else null end ) as countofchallenges from hackers H inner join Submissions S on h. Type of Triangle. Feel free to use, share, and improve upon it! 🚀 Level up your SQL skills with these HackerRank challenges and become a coding master! 🚀 Query the difference between the maximum and minimum city populations in CITY. Log In; Sign Up; Prepare. SQL. If there was no ^ then it would be the 5 letters aeiou, which is not what we want. Revising the Select Query I. HackerRank SQL Solutions. Binary Tree Nodes. Find the number of duplicate CITY names in STATION. difficulty_level and d. Hard SQL (Intermediate) Max Score: 50 Success Rate: 85. lat_n is used here because in the end part the question says '' where LAT_N is the northern latitude and LONG_W is the western longitude. This repository contains all 58 solutions to the HackerRank SQL Practice Questions. 65%. Interviews. The ^ inside the brackets says that we can use any letter EXCEPT aeiou. Advanced Join. hacker_id inner join Challenges c Well, then you are in luck because you can achieve the same thing with CTE-s, only by slightly changing your SAS code. Create your HackerRank account and join Simply SQL. Medium SQL (Basic) Max Score: 30 Success Rate: 93. Skills. A desktop application wouldn't allow mixing up UI elements like this. The goal of this repository is to document and share SQL queries that I have Welcome to the HackerRank SQL Solutions repository! 🚀 Dive into a curated collection of SQL queries crafted to tackle a range of challenges. But you need to add a terminating / after your code, on a line on its own - Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. hacker_id) cnt from challenges c inner join hackers h on c. There are no matching challenges. It turned out not to be necessary to sort by "employee_id": SELECT name FROM employee WHERE salary > 2000 AND months < 10; better solution to hackerrank sql problem . Forgot password? or. Demo bài tập SQL level Hard. During SQL processing it returned: SQL0104N An unexpected token "database" was found following "k line. put_line(rpad('* ', i * 2, '* ')); And you don't have to code in uppercase :) SQL (Basic) SQL (Intermediate) SQL (Advanced) Difficulty. Solve SQL Project Planning. These free images are pixel perfect to fit your design and available in both PNG and vector. Skip to content. Sign in Product The times that employees log in and out are recorded over the course of a month. Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. MS SQL SERVER. We use Log In; Sign Up; Prepare. Medium SQL (Intermediate) Max Score: 30 Success Rate: 97. 7880 and less than 137. Hiring developers? Log In; Sign Up; Prepare. or. Weather Observation Station 5. Medium SQL (Intermediate) Max Score: 20 Success Rate: 96. Hi all! So I've been given the HackerRank Data Analyst test for interview, for preparation I've been doing SQL practice on HackerRank. In this query: - SELECT NAME specifies that you only want to retrieve the NAME field from the CITY table. Based on that alone, the question should be closed as unreproducible. 76%. SQL interview questions have been a critical component of technical hiring for decades. that's why it is written in the query. Download icons in all formats or edit them for your designs. 7780, and round to 4 decimal places SQL. This project is open-source and available under the MIT License. For MS SQL users: SELECT T1. SELECT CEILING(AVG(SALARY - CAST(REPLACE(CAST(SALARY AS VARCHAR(10)), '0', '') AS float))) FROM EMPLOYEES Your code evaluator returns 2253. The CTE starts with an initial row where num is set to 2 (the first prime number). Databases. Whether you’re prepping for an interview or In this post, we will be covering all the solutions to SQL on the HackerRank platform. Bài viết này mình viết trước giới thiệu về HackerRank, bài viết sau mình sẽ chia sẻ thêm về bài Test lấy chứng chỉ. Custom icons. For each employee, determine the number of hours worked during the weekends. All the problems solved in the first part of this series are used to practice basic SQL commands such as how to set basic filter conditions and how to select all columns from a table. Learn programming skills. Functional Programming. Ready to code? SELECT DISTINCT city FROM station WHERE city REGEXP '^[aeiouAEIOU]. The first condition in that line makes sure pairs with the same X and Y values don't get to count themselves as their symmetric pair. Welcome Back! Login to your account It's nice to see you again. 50%. 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. challenge_id and c. Create a HackerRank account Medium SQL (Intermediate) Max Score: 30 Success Rate: 97. I tried someting similar and got this result: Wrong Answer :( 1/1 test case failed Sample Test case 0 Compiler Message Wrong Answer Your Output (stdout) You have not made any submissions for Weather Observation Station 4 yet. The interviewer mentioned I will be tested on SQL and Statistics, now when I clicked on the test link to see the test overview there are 3 sections. Already have an account?Log in Join over 23 million developers in solving code Draw the triangle pattern using asterisks. Join over 23 million developers in solving code challenges on HackerRank, Hiring developers? Log In; Sign Up; Prepare. Population Census . Write a query to generate a report containing three columns: Name, Grade and Mark. hacker_id group by c. SQL Project Query the sum of Northern Latitudes having values greater than 38. Linux Shell. /* SAS code */ CREATE TABLE initial_table AS ( SELECT stuff FROM table ); CREATE TABLE second_table AS ( SELECT stuff FROM initial_table ); CREATE TABLE final_table AS ( SELECT stuff FROM second_table ); /* Same code using CTEs */ WITH 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 My SQL select distinct CITY from STATION Where SUBSTR(CITY, LENGTH(CITY), 1) NOT IN ('a','e','i','o','u'); Print employee names. But as others said. Icons. Reply reply AlienGivesManBeard I did all the free SQL challenges in Hackerrank and it was enough for me to solve any problems I was presented with. 02%. Hard. Status. +[aeiouAEIOU]$'; Query a list of top-scoring hackers. name from ( select h. Despite being over four decades old, SQL is still evolving at a rapid pace. We use cookies to ensure you have the best browsing experience on our website. As I recall the sql portion required grouping and aggregating visitors or some events. Need Help? View discussions. Surprisingly it does seem to understand PL/SQL; and even more surprisingly it handles the set serveroutput on, which is a SQL\Plus/SQL Developer client command. Query the smallest of STATION's Northern Latitudes that is greater than 38. Your result cannot contain duplicates. Icon sets Staff picks Newest icon sets Popular icon sets Categories Styles. I got the sol but it was not in the simple way and also took time in processing. Recently, I achieved the HackerRank SQL Advanced Certification, and I’m excited to share my experience with all of you. Get free Hackerrank icons in iOS, Material, Windows and other design styles for web, mobile, and graphic design projects. Learn how to use them effectively with the OVER This repository contains solutions to various SQL challenges and problems solved on HackerRank. Contribute to aghodke24/HackerRank-Sql-Advanced-questions development by creating an account on GitHub. There is a bug in your SQL Server code evaluator. Easy SQL (Basic) Max Score: 10 Success Rate: 95. Available in PNG and SVG formats. 시리즈 HackerRank SQL. challenge_id=s. HackerRank is a platform for competitive coding. Medium. Start_Date,T2. - FROM CITY indicates the table from which you are querying. Easy SQL (Basic) Max Score: 20 Success Rate: 96. . Easy SQL (Basic) Max Score: 10 Success Rate: 98. Download this hackerrank, logo, logos icon. [HackerRank] Revising Aggregations - The Count Function. hacker_id=s. 83%. 60%. Each solution is crafted to address a specific SQL problem from the HackerRank SQL challenge set, covering Tips for Passing the HackerRank SQL Advanced Certification. SQL (Basic) SQL (Intermediate) SQL (Advanced) Difficulty. If you’re a data scientist or software engineer on the job market, the ability to demonstrate your database skills in an SQL interview is critical to landing your next role. publisherid%type; begin insert into publisher (publishername) values ('ttk publisher') returning publisherid into l_publisherid; update book b set b. Your Preparation. However, I see no use on joining on other tables when the Employee table already has almost all the information needed. select h. Find the maximum amount of money earned by any employee, as well as the number of top earners (people who have earned this amount). The original solution would thus be faster. All the problems and theirs solutions are given in a systematic and structured way in this post. Query the total population of all cities for in the District of California. Get interview ready for top companies by solving an interview Medium SQL (Intermediate) Max Score: 20 Success Rate: 96. score=s. In this article, I’ll walk you through two questions from the exam along Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. Amber's conglomerate corporation just acquired some new companies. End_Date FROM ( SELECT Start_Date,ROW_NUMBER() OVER (ORDER BY Start_Date) RN FROM Projects WHERE Start_Date NOT IN (SELECT END_Date FROM Projects) ) AS T1 INNER JOIN (SELECT End_Date,ROW_NUMBER() OVER (ORDER BY End_Date) RN FROM Projects WHERE That site doesn't seem to ever show your the output from your submission, unhelpfully, but does with just 'run code'. Interview Preparation Kit. Easy. I had to use MS SQL Sever because CTE's are not available on the version of MySQL of Hackerrank. Solved. i ran two queries My SQL Server: SELECT DISTINCT CITY FROM STATION WHERE RIGHT (CITY, 1) not IN ('A','E', 'I', 'O', 'U') OR LEFT (CITY,1) not IN ('A','E', 'I', 'O', 'U'); These are the most common problems we encounter while integrating the Traffic Rider SQL to look into the matter. I do have these 2 extra line SQL doesn't return extra lines. Demo bài tập SQL level Medium. 2345, truncated to 4 decimal places. select name from city where population>120000 and countrycode ='usa'; Medium SQL (Intermediate) Max Score: 30 Success Rate: 97. Though many experts are attempting to resolve the problem, none of Easy SQL (Advanced) Max Score: 25 Success Rate: 96. Join over 23 million developers in solving code challenges on HackerRank, Login and join Simply SQL. thank you so much! really helped. SQL (Basic) SQL find users who submitted a query every day. In this post, we will be covering all the solutions to SQL on the HackerRank platform. Apply; Hiring developers? Log In; Sign Up; Prepare. WITH RECURSIVE num_list AS (): This statement defines a recursive CTE called num_list. 로그인. It is very important that you all first give it a try & brainstorm yourselves before having a SQL (Basic) SQL (Intermediate) SQL (Advanced) Difficulty. fqndsetnsbwfdwjtwccnobcrkpzntwbevusdefryxo