Hackerrank sql log Download this hackerrank, logo, logos icon. Status. For SQL server / MS sql . I had to use MS SQL Sever because CTE's are not available on the version of MySQL of Hackerrank. 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. SQL. Query the median of Northern Latitudes in STATION and round to 4 decimal places. thank you so much! really helped. GitHub. Whether you’re prepping for an interview or In this post, we will be covering all the solutions to SQL on the HackerRank platform. challenge_id and c. select name from city where population>120000 and countrycode ='usa'; Medium SQL (Intermediate) Max Score: 30 Success Rate: 97. 65%. 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. Easy SQL (Basic) Max Score: 20 Success Rate: 96. Despite being over four decades old, SQL is still evolving at a rapid pace. It was python and sql. 49%. Hiring developers? Log In; Sign Up; Prepare. 60%. In this article, I’ll walk you through two questions from the exam along Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. Linux Shell. Preparation Kits. Sign in Product The times that employees log in and out are recorded over the course of a month. 02%. 4. 66%. Problem. Welcome Back! Login to your account It's nice to see you again. Skills. It can be done without CTE also, by joining tables only by derived tables. SQLSTATE=42601 Demo bài tập SQL level Easy. put_line(rpad('* ', i * 2, '* ')); And you don't have to code in uppercase :) SQL (Basic) SQL (Intermediate) SQL (Advanced) Difficulty. Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. publisherid = l_publisherid where 📜 License. Skip to content. 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. hacker_id group by c. Binary Tree Nodes. name from ( select h. 84%. View top submissions. Navigation Menu Toggle navigation. score=s. I also tried stratascratch and it's all good, everything is as you expect. MS SQL SERVER. I have also earned a 5-star badge on HackerRank for Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. It was like 2 hours. Log In. This repository contains all 58 solutions to the HackerRank SQL Practice Questions. Demo bài tập SQL level Medium. - The WHERE CountryCode = 'JPN' clause filters the results to include only cities that have the country code 'JPN', which corresponds to Japan. Hy vọng nó là kiến thức hữu ích với bạn. 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 key is the HAVING line, with two conditions. SELECT DISTINCT city FROM station WHERE REGEXP_LIKE(city, '^[aeiou]', 'i'); In Oracle, the LIKE operator does not support character classes like [aeiou]. 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. that's why it is written in the query. Your result cannot contain duplicates. 7880 and less than 137. I'm not in a FAANG company but at a top software company in my country (Norway) working as a Data Engineer. Then you could replace the inner loop with dbms_output. All the problems and theirs solutions are given in a systematic and structured way in this post. Hi all! So I've been given the HackerRank Data Analyst test for interview, for preparation I've been doing SQL practice on HackerRank. SQL (Basic) SQL find users who submitted a query every day. It's frustrating. 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. Need Help? View discussions. But as others said. 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. However, I see no use on joining on other tables when the Employee table already has almost all the information needed. 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. difficulty_level=d. '' and there are two columns named lat_n and long_w. */ uncatalog". Query the smallest of STATION's Northern Latitudes that is greater than 38. 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. Amber's conglomerate corporation just acquired some new companies. 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. This does not start with a vowel, and does not end with a vowel. SQL interview questions have been a critical component of technical hiring for decades. Medium SQL (Intermediate) Max Score: 20 Success Rate: 96. 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. Already have an account?Log in Join over 23 million developers in solving code Draw the triangle pattern using asterisks. or. Interviews. This project is open-source and available under the MIT License. For each employee, determine the number of hours worked during the weekends. During SQL processing it returned: SQL0104N An unexpected token "database" was found following "k line. Finding the min or max is an O(n) operation. 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. Create a HackerRank account Medium SQL (Intermediate) Max Score: 30 Success Rate: 97. Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. 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. SQL Project Planning. We use Log In; Sign Up; Prepare. Apply; Hiring developers? Log In; Sign Up; Prepare. Easy SQL (Basic) Max Score: 10 Success Rate: 98. HackerRank SQL Solutions. They had to be ranked by some metric. Though many experts are attempting to resolve the problem, none of Easy SQL (Advanced) Max Score: 25 Success Rate: 96. hacker_id=h. The PADS. Log In; Sign Up; Prepare. @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. Query the Western Longitude for the smallest value of the Northern Latitudes greater than 38. Based on that alone, the question should be closed as unreproducible. In this query: - SELECT NAME specifies that you only want to retrieve the NAME field from the CITY table. Create your HackerRank account and join Simply SQL. Medium SQL (Intermediate) Max Score: 30 Success Rate: 97. 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. 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. 0 rather than 2253, so it is marked as an incorrect answer. Custom icons. Submissions. 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. +[aeiouAEIOU]$'; Query a list of top-scoring hackers. 50%. Weather Observation Station 5. 74%. Available in PNG and SVG formats. Print the names of employees who earn more than $2000 per month and have worked at the company for less than 10 months. Solve Challenge. 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'. Query list of CITY names from STATION that either do not start with vowels or do not end with vowels. Facebook. We use cookies to ensure you have the best browsing experience on our website. 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. Get free Hackerrank icons in iOS, Material, Windows and other design styles for web, mobile, and graphic design projects. difficulty_level and d. Databases. 로그인. Interview Preparation Kit. I got the sol but it was not in the simple way and also took time in processing. Tổng kết. You have not made any submissions for 15 Days of Learning SQL yet. The median is the 50th percentile of any set. Remember me. Join over 23 million developers in solving code challenges on HackerRank, Login and join Simply SQL. [HackerRank] Revising Aggregations - The Count Function. A desktop application wouldn't allow mixing up UI elements like this. hacker_id as id, count (case when s. Medium SQL (Basic) Max Score: 30 Success Rate: 93. Basic Select. Find total number of employees. Revising the Select Query II. Draw The Triangle 1. Download icons in all formats or edit them for your designs. These free images are pixel perfect to fit your design and available in both PNG and vector. Easy SQL (Basic) Max Score: 20 Success Rate Find the number of duplicate CITY names in STATION. 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. Designers Top selling Most followers Newest designers Most icons Following. I don't know how Leetcode is so I can only speak of Hackerrrank. 76%. Recently, I achieved the HackerRank SQL Advanced Certification, and I’m excited to share my experience with all of you. 71%. This is 100% a client-side problem in how the results are displayed. Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. 95%. Easy SQL (Basic) Max Score: 10 Success Rate: 95. It is very important that you all first give it a try & brainstorm yourselves before having a SQL (Basic) SQL (Intermediate) SQL (Advanced) Difficulty. Join over 23 million developers in solving code challenges on HackerRank, Hiring developers? Log In; Sign Up; Prepare. 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. Easy SQL (Basic) Max Score: 10 Success Rate Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. in oracle . 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 . No signup required. Query the Manhattan Distance between two points, round or truncate to 4 decimal digits. Solve SQL Project Planning. The original solution would thus be faster. 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. Order your output by ascending company_code. hacker_id=s. Pivot the Occupation column so the Name of each person in OCCUPATIONS is displayed underneath their respective Occupation. log. Visit the website for more information. for sql server users, there is a built in function that helps you with percentiles. Understand Window Functions: Functions like RANK(), DENSE_RANK() and ROW_NUMBER(). Learn how to use them effectively with the OVER This repository contains solutions to various SQL challenges and problems solved on HackerRank. Revising the Select Query I. Hard SQL (Advanced) Max Score: 50 Success Rate: 79. - FROM CITY indicates the table from which you are querying. /* 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. You can use substring as solution to this question. Write a query to generate a report containing three columns: Name, Grade and Mark. Solved. Get interview ready for top companies by solving an interview Medium SQL (Intermediate) Max Score: 20 Success Rate: 96. Find the maximum amount of money earned by any employee, as well as the number of top earners (people who have earned this amount). Functional Programming. Subdomains. Population Census . SELECT CEILING(AVG(SALARY - CAST(REPLACE(CAST(SALARY AS VARCHAR(10)), '0', '') AS float))) FROM EMPLOYEES Your code evaluator returns 2253. Join us Sign up. If there was no ^ then it would be the 5 letters aeiou, which is not what we want. Type of Triangle. 83%. Icons. 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. Start_Date,T2. tried this in oracle: with comp as ( select c. SQL (Basic) SQL (Intermediate) SQL (Advanced) Difficulty. select h. 48%. Easy SQL (Advanced) Max Score: 25 Success Rate: 96. Unsolved. Learn programming skills. Icons Illustrations 3D illustrations Stickers. 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. 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. Bài viết này mình viết trước giới thiệu về HackerRank, bài viết sau mình sẽ chia sẻ thêm về bài Test lấy chứng chỉ. 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. Hard. Continue with Google. Solve SQL | HackerRank We use cookies to ensure you have the best browsing experience on our website. Demo bài tập SQL level Hard. Query the total population of all cities for in the District of California. Medium. Expected tokens may include: "JOIN ". . hacker_id , h. You have not made any submissions for SQL Project Planning yet. There are no matching challenges. Advanced Join. 7780, and round to 4 decimal places SQL. There is a bug in your SQL Server code evaluator. SQL Project Query the sum of Northern Latitudes having values greater than 38. Here is the schema for table station: Ordering items in a list is an O(n*log(n)) operation. Find the number of duplicate CITY names in STATION. Also, if another entry of different occupation is done then code is to be updated again. find users who submitted a query every day. percentile_disc is used to find a row in a set of records which is the nth percentile of that set. 15 Days of Learning SQL. 2345, truncated to 4 decimal places. As I recall the sql portion required grouping and aggregating visitors or some events. 82%. The Report. WITH RECURSIVE num_list AS (): This statement defines a recursive CTE called num_list. 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. hacker_id as hackerid, name, count(c. 시리즈 HackerRank SQL. 7780 in STATION and round to 4 decimal places. 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. Regex. mzzzi. Forgot password? or. The output is in a "code-ish" format. 03%. Icon sets Staff picks Newest icon sets Popular icon sets Categories Styles. 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. Hard SQL (Intermediate) Max Score: 50 Success Rate: 85. LinkedIn. hacker_id) cnt from challenges c inner join hackers h on c. I do have these 2 extra line SQL doesn't return extra lines. SELECT CEIL(AVG(salary) - AVG(REPLACE(salary, '0', ''))) FROM employees; Query Breakdown: SELECT: This clause selects the result of the computation. I removed the unrelated sql-server tag and added html as a generic guess. Contribute to aghodke24/HackerRank-Sql-Advanced-questions development by creating an account on GitHub. Ready to code? SELECT DISTINCT city FROM station WHERE city REGEXP '^[aeiouAEIOU]. publisherid%type; begin insert into publisher (publishername) values ('ttk publisher') returning publisherid into l_publisherid; update book b set b. In this post, we will be covering all the solutions to SQL on the HackerRank platform. The goal of this repository is to document and share SQL queries that I have implemented to solve real-world scenarios and coding 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 . This repository contains solutions to various SQL challenges and problems solved on HackerRank. For MS SQL users: SELECT T1. Draw The Triangle 2. The CTE starts with an initial row where num is set to 2 (the first prime number). 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. Easy. challenge_id=s. Your Preparation. score then 1 else null end ) as countofchallenges from hackers H inner join Submissions S on h. HackerRank is a platform for competitive coding. Print the total number of challenges created by hackers. The ^ inside the brackets says that we can use any letter EXCEPT aeiou. jbbbq bejbe gfivarox qtif imomnd zle koezzor tkeov vnd jycb