Count the employees hackerrank solution. There is one manager, M1 .
Count the employees hackerrank solution By the end of each day, all of the school’s waste is in plastic bags weighing between 1. You have a collection of N rods. The table and earnings data is depicted in the following diagram: The maximum earnings value is 69952. - adminazhar/hackerrank-SQL-basic-skills-certification-test-solution Jun 17, 2023 · Runtime: 1322ms, beats 23. SELECT max_earnings, Hackerrank Solution. COUNT(*) AS 'No of Employees' FROM departments INNER JOIN employees ON employees. Query a count of the number of cities in CITY having a Population larger than 100,000. com practice problems in C++, python and SQL - Hackerrank_solutions/SQL/New Companies. Interview Questions. The only employee with earnings = 69952 is Kimberly, so we print the maximum earnings value (69952) and a count of the number of Jul 24, 2024 · The first line contains an integer, n, denoting the number of employees on which operations have to be performed. The times that employees log in and out are recorded over the course of a month. Oct 19, 2020 · The only employee with earnings is Kimberly, so we print the maximum earnings value 69952 and a count of the number of employees who have earned $69952 (which is 1) as two space-separated values. 639456. ; Improve Count the faces you see in a provided image. com practice problems using Python 3, С++ and Oracle SQL - marinskiy/HackerrankPractice May 25, 2024 · Contribute to cholu6768/SQL-Hackerrank-Practice-Questions development by creating an account on GitHub. Subquery in SELECT clause: Include a Jul 20, 2024 · We welcome contributions to enhance this collection of HackerRank 30 Days of Code solutions: Improve Existing Solutions: Optimize or clarify current solutions. 00 pounds. Problem 1. 98 | Contains solved queries for the Hackerrank SQL (Basic) Skills Certification Test 🎓. Write a query to find the Dec 23, 2024 · Hello coders, today we are going to solve Revising Aggregations – The Count Function HackerRank Solution in SQL. hacker_id, h. Two employees can form a team if they have the same rating, and one employee can be in at most one team. Click here to see more codes for NodeMCU ESP8266 and similar Family. FROM Employee: Specifies the table name from which to retrieve the data. Beginner Certification Merit Rewards : Write a query to find employee Ids along with names of all employees who worked This certification tests basic C# skills that includes understanding the structure of C# programs, types, and Variables, basic OOP, Properties and Indexers, Collections, Exception handling, among o We use cookies to ensure you have the best browsing experience on our website. Amber’s conglomerate corporation just acquired some new companies. WHERE monthly_salary * months_worked = (SELECT MAX(monthly_salary * months_worked) FROM Employee): Filters the rows where the product of monthly salary and Find the maximum amount of money earned by any employee, as well as the number of top earners (people who have earned this amount). ID Integer String COMPANY Description A Oct 27, 2019 · SELECT COUNT(CITY) — COUNT(DISTINCT CITY) FROM STATION ; COUNT(*) FROM Employee GROUP BY earnings ORDER BY earnings DESC LIMIT 1; HackerRank SQL Problems and Solutions — 1. Todd has been an employee for 5 months and earns $3396 per month. 2 Jahrs vor. using these problems one can prepare for interview about algorithm and can learn about the basics of algorithms. This repository contains my solutions to various coding challenges on HackerRank. Click here to see more codes for Raspberry Pi 3 and similar Family. On the basis of merit, a company decides to promote some of its employees in its HR division at the end of the quarter because of their high performance. The only employee with earnings 69952 is Kimberly, so we print the maximum earnings value (69952) and a count of the number of employees who have earned 69952 170+ solutions to Hackerrank. Weather Observation Station 2. The administrator carelessly inserted the records of many employees into the employee records table multiple times. We define an employee’s total earnings to be their monthly salary x months worked, and the maximum total earnings to be the maximum total earnings for any employee in the Employee table. There are two senior managers, SM1 and SM2, under LM1. senior_manager_code) AS Total Senior Manager, COUNT(DISTINCT M. in this article we have collected the most asked and most important Hackerrank coding questions that you need to prepare to successfully crack Hackerrank coding round for companies like IBM, Goldman Very nice. Explanation. Find max among all. senior_manager_code) as no_of_senior_manager, count (distinct m. On each day, you will choose a subset of the problems and solve them. Count Solutions - HackerRank wet shark Contains solved queries for the Hackerrank SQL (Basic) Skills Certification Test 🎓. There are two senior managers, SM1 and SM2, under LM1. Revising the Select Query II. -- Earnings = salary * months -- Find Jun 25, 2023 · The Problem You are given a table, Projects, containing three columns: Task_ID, Start_Date, and End_Date. HackerRank SQL Problems and Solutions —2. N which you need to complete. where employee_id is an employee's ID number, name is their name, months is the total number of months they've been working for the company, Contains solved queries for the Hackerrank SQL (Basic) Skills Certification Test 🎓. You've arranged the problems in increasing difficulty order, and the i th problem has estimated difficulty level i. name, count(employee. Solution. Query the following two values from the 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. Write a query to find the employee IDs along with the names of all its employees who Oct 7, 2022 · Data Structures Linked Lists: Detect a Cycle 25 Solution. name, COUNT(c. You can access the problem on Hackerrank if you already have an account. There is one manager, M1 Print the names of employees who earn more than $2000 per month and have worked at the company for less than 10 months. Jan 11, 2025 · 1. --Write a query that prints a list of employee names (i. Write a query to print the IDs of the companies that have more than 10000 employees, in ascending order of ID. company_code LEFT JOIN Senior_Manager s Welcome to the HackerRank Challenge Solutions repository! 🎉. : the name attribute) for employees in Employee having a salary greater than $ 2000 per month who have been employees for less than 10 Revising the Select Query I. It’s an interesting one because you can end up overthinking your approach. The STATION table is described as SELECT C. 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. There are n employees, having IDs 1, 2, n, where the th employee has rating denoted by rating[i]. We use cookies to ensure you have the best browsing experience on our website. Your solution’s ready to go! Our expert help has broken down your problem into an easy-to-learn solution you can count on. Aug 28, 2023 · This repository contains the solutions for HackerRank Beginner and Intermediate SQL Certifications. Order your output by ascending company_code. Michael has been an employee for 6 months and earns $2017 per month. The janitor of a high school is extremely efficient. e. Else, decrease noOfPlayers by count and return true. The four important functions involved are: Map (the mapper function) EmitIntermediate(the intermediate key,value pairs emitted by the mapper functions) Reduce (the reducer function) Emit (the final output, after summarization COUNT(*) AS employees_with_max_earnings: Counts the number of employees who have the maximum total earnings. The company has assigned you the task of Dec 12, 2023 · Correlated subqueries: Create subqueries that reference columns from the outer query, enabling context-aware filtering. So you may gradually iterate on your solution to handle larger and more complex cases. Please read our A collection of solutions to competitive programming exercises on HackerRank. An employee's record is considered duplicate only if all columns (fields) of the employee's record are duplicated. DevSecOps DevOps CI/CD View all use cases Amber's conglomerate corporation just acquired some new companies. The rating for Alice's challenge is the triplet a = (a[0], a[1], a[2]), and the rating for Bob's challenge is the triplet b = (b[0], b[1], b[2]). May 2, 2023 · #Here are HackerRank questions and my solutions using MySQL. HackerRank is a platform for competitive coding. You switched accounts on another tab Learn how to count the number of employees in a table using SQL on HackerRank. For each employee, determine the number of hours worked during the weekends. Create a Jun 18, 2023 · Saved searches Use saved searches to filter your results more quickly Alice and Bob each created one problem for HackerRank. From my HackerRank solutions. More than 100 million people use GitHub to discover, fork, and contribute to over 420 million projects. Now we got the count of challenges performed by individual students. It is very important that you all first give it a try & Apr 18, 2023 · select department. Source Code 3: Using JOIN and Window Function This method uses a window function COUNT() OVER(PARTITION BY managerId) to count the number of 6 days ago · After going through the solutions, you will be clearly understand the concepts and solutions very easily. name FROM EMPLOYEE JOIN EMPLOYEE_UIN ON (EMPLOYEE. Joe Dec 4, 2022 · O ALL 2 3. hacker_id GROUP BY c. In the third case, the teams are {3}, {1,2,3}, the size of the smaller group being 1. EMP_STATUS, EMP_TERMINATION DATE, LOC_ID, MGR_ID 3 3 Output should be in below This repository contains solutions to all the HackerRank SQL Practice Questions - HackerRank-SQL-Challenges-Solutions/Basic Select/Employee Names. : the name attribute) from the Employee table in alphabetical order. 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. A reviewer rates the two challenges, awarding points on a scale from 1 to 100 for three categories: problem clarity, originality, and difficulty. Ansichten: 22. Covered in subquery practice exercises 10, 11, 12, and 13. company_code, C. Write a query to print the hacker_id, name, and the total number of challenges created by each student. Solutions By company size. In company C1, the only lead manager is LM1. Each line i of the n subsequent lines (where 0 ≤ i < n) contains space-separated strings, such that the first of them is the first name of the employee, the second is the last name of the employee, the third is the company of the employee, and the fourth is Jan 12, 2025 · 170+ solutions to Hackerrank. You signed out in another tab or window. Try Sample Test. 01 pounds and 3. : the name attribute) for employees in Employee Query a count of the number of cities in CITY having a Population larger than . Contribute to BlakeBrown/HackerRank-Solutions development by creating an account on GitHub. These solutions are categorized by difficulty level and domain to make it easier to navigate and find what you need. Problems with similar vi values are similar in nature. - adminazhar/hackerrank-SQL-basic-skills-certification-test-solution Mar 30, 2021 · The maximum earnings value is 69952. Top Earners. id) as count_of_employees_in_the_department FROM DEPARMENT LEFT JOIN EMPLOYEE ON Mar 31, 2024 · SELECT c. " Nov 5, 2020 · We define an employee's total earnings to be their monthly salary × months worked, and the maximum total earnings to be the maximum total earnings for any employee in the Employee table. : the name attribute) for employees in Employee having a salary greater than $2000 per month who have been employees for less than 10 months. MySQL solution. Aug 19, 2023 · Write a query that prints a list of employee names (i. company_code You signed in with another tab or window. Write a query that prints a list Here’s a quick an easy SQL Hackerrank solution for one of the last “aggregate” courses. - adminazhar/hackerrank-SQL-basic-skills-certification-test-solution Jun 22, 2023 · 19. Stay tuned as I’ll share more of my In company C1, the only lead manager is LM1. Count the Employees The data for the number employed at several famous IT companies is maintained in the COMPANY table. The STATION table is described as follows:. : the name attribute) from the Employee table in alphabetical order Effective solutions to hackerrank. Aggregation/008. - MadamHippo/Java-leetcode Ex: #441 [Solved] Counting On a Tree solution in Hackerrank - Hacerrank solution C, C++, java,js, Python Advanced Ex: #442 [Solved] Costly Intervals solution in Hackerrank - Hacerrank solution C, C++, java,js, Python Advanced Dec 27, 2024 · Hello coders, in this post you will find each and every solution of HackerRank Problems in C language. Jan 7, 2025 · Saved searches Use saved searches to filter your results more quickly · GitHub is where people build software. : the name attribute) for employees in Employee having a salary greater than per month who have been Jul 20, 2023 · In conclusion, I hope you enjoyed following my journey in solving this tricky HackerRank SQL problem. Reload to refresh your session. Easy. Problem; Input Format; Solution – Employee Names in SQL. Dec 24, 2024 · Solution – Count the number of elements in an Array – HackerRank Solution #Given a list of countries, each on a new line, your task is to read them into an array and then display the count of elements in that array. Certificates To get a certificate, two problems have to be solved within 90 minutes. Dec 23, 2024 · Hello coders, today we are going to solve Employee Names HackerRank Solution in SQL. Questions Feel free to choose your preferred programming language from the list of languages supported for each question. There are q queries, each of the form (/, r). The · All HackerRank solutions for Python, Java, SQL, C, C++, Algorithms, Data Structures. In the last case, you can build one group containing all of the contestants. She wants Dec 24, 2024 · Objective. sql at master · IhorVodko/Hackerrank_solutions Write a query that prints a list of employee names (i. (here , 6 is the count). View more Comments. department_id = departments. It is guaranteed that the difference between the End_Date and the Start_Date is equal to 1 day for each row in You signed in with another tab or window. Enterprises Small and medium teams Startups By use case. 34 | Permalink. hacker_id = c. You are given the lengths of each rod. If decreasing makes noOfPlayers negative, then this function simply returns false. - kilian-hu/hackerrank-solutions Solutions of HackerRank Problems in C, C++, Python - HackerRank_Solutions/Mobile Numeric Keypad Problem. The Employee table contains an id as the primary key, name, salary, and departmentId which is a foreign key from the Department table. This is a sample test to help you get familiar with the HackerRank test environment. 10. Top Earners | Easy | HackerRank We define an employee's total earnings to be their monthly salary × months worked, and the maximum total earnings to be the maximum total earnings for any employee in the Employee The Employee table containing employee data for a company is described as follows: . Sort your result by ascending Jan 10, 2025 · 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. department_id, department_name ORDER BY department_name; Solution: Mar 7, 2021 · The only employee with earnings = 69952 is Kimberly, so we print the maximum earnings value (69952) and a count of the number of employees who have earned $69952 (which is 1) as two space-separated values. Order your output by ascending company_code. Write a query Dec 23, 2024 · Solution – Revising Aggregations – The Count Function in SQL MySQL SELECT COUNT(*) FROM CITY WHERE POPULATION > 100000. id = EMPLOYEE_UIN. Submitted By. Crack your coding interview and get hired. Take care to account for very different kinds of faces! Output Format. 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. This step-by-step tutorial will show you how to use the `COUNT()` function to get the total number of rows In this post, we will be covering all the solutions to SQL on the HackerRank platform. Solution: Jul 27, 2020 · select months*salary as earnings, count(*) from employee group by earnings order by earnings desc limit 1; Link. manager_code) as no_of_manager, count (distinct e. You have to tell how many different triangles can be formed using these rods. The first group containing 3 members is the smallest. The CITY table is Jan 10, 2025 · Employee Names – HackerRank Solution; Employee Salaries – HackerRank Solution; Type of Triangle – HackerRank Solution; The PADS – HackerRank Solution; Occupations – HackerRank Solution; Binary Tree Jan 3, 2025 · Problem. Kommentare: 0. java Data Structures Queues: A Tale of Two Stacks 30 Solution. lead_manager_code) AS Total Lead Manager, COUNT(DISTINCT SM. Continue. Sep 16, 2024. 1 day ago · Hackerrank Coding Questions for Practice. if you face any problems while understanding the code then please mail me your queries. The only employee with earnings 69952 is Kimberly, so we print the maximum earnings value (69952) and a count of the number of employees who have earned 69952 Jan 11, 2025 · Count the employees in SQL hackerrank github. Print the names of employees who earn more than $2000 per month and have worked at the company for less than 10 months. C1 Monika 1 2 1 2 C2 Samantha 1 1 2 2. employee_code) AS Total Employee FROM Company C LEFT JOIN Lead_Manager LM ON LM. company_code = l. Create a HackerRank account Be part of a 23 million-strong community of developers. The CITY table is described as follows: Author. Disclaimer: The above Problem (Revising Aggregations – The Count para mysql. cracking-the-coding-interview hackerrank hackerrank-python hackerrank-solutions For the first case, Roy can form two teams: one with contestants with skill levels {-4,-3,-5} and the other one with {4,5,2,3}. In the second case, the only team is {-4}. You signed in with another tab or window. Below you can find the Top 25 Hackerrank based coding questions with solutions for the Hackerrank Coding test. For example, if there are three records in the table with CITY values 'New York', 'New York', 'Bengalaru', there are 2 different city Mar 30, 2024 · Angela has been an employee for 1 month and earns $3443 per month. id) WHERE Learn how to query company details including founder name and employee counts categorized by lead managers, senior managers, managers, and total employees, ordered by company_code. There is one manager, M1, under senior manager SM1. Sort your results by the total number of Mar 30, 2024 · Leetcode blind 75 questions in Java with explanations and notes. Nov 4, 2023 · 19) Employee Salaries Problems: Write a query that prints a list of employee names (i. One more thing A collection of solutions to competitive programming exercises on HackerRank. Jul 10, 2023 · The GROUP BY clause groups the employee_id and name from the m alias (managers), calculates the count of reports and the average age. SELECT salary * months AS earnings, COUNT (*) FROM Employee GROUP BY earnings ORDER BY earnings DESC LIMIT 1; Let me know if you have any questions. You signed in with another tab or window. - kilian-hu/hackerrank-solutions Jul 31, 2024 · In this Validating UID problem, ABCXYZ company has up to 100 employees. There is 1 question that is part of this test. department_id GROUP BY departments. After going through the solutions, you will be able to understand the concepts and solutions very easily. In company Feel free to use my solutions as inspiration, but please don't literally copy the code. Jan 12, 2025 · Problem. We can join all tables with company_code, lead_manager_code, senior_manager_code, manager_code and employee_code. cpp at master · ravircit/HackerRank_Solutions Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. 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 You signed in with another tab or window. Julia asked her students to create some coding challenges. Max Score. uin, EMPLOYEE. sql at master · marinskiy/HackerrankPractice The Employee table containing employee data for a company is described as follows: . SELECT name FROM Employee WHERE salary > 2000 AND months < 10 ORDER BY employee_id; Let me know if you have any questions. It takes an integer count as a parameter and tries to decrease noOfPlayers by count. Copy select * from CITY where POPULATION > 100000 and COUNTRYCODE = 'USA';. Q1. Aug 11, 2023 · Solution: select salary*months , count(*) from employee group by salary*months order by salary*months desc limit 1; 9. You have also assigned a rating vi to each problem. Write a query to find the maximum total earnings for all Mar 14, 2023 · Learn about basic MySQL and My solutions to various HackerRank SQL problems using MySQL - shanuhalli/MySQL-Basics-to-HackerRank (SELECT COUNT (DISTINCT EMPLOYEE_CODE) FROM 3 days ago · The company pays the database administrator too little so the work has been quite clumsy. The company decides to create a unique identification number (UID) for each of its employees. Feb 6, 2022 · Sample Output. challenge_id) AS challenge_count FROM Hackers AS h JOIN Challenges AS c ON h. where LAT_N is the northern latitude and LONG_W is the western longitude. OK maybe going on 150. Feb 22, 2024 · Badge to be earn. select salary*months as ingresos, count(*) from employee group by ingresos order by ingresos desc limit 1; Nov 25, 2024 · Q ue 1. name HAVING challenge_count = ( --Result should return UIN followed by NAME --Solution query SELECT EMPLOYEE_UIN. employee_code) as no_of_employee FROM Company c LEFT JOIN Lead_Manager l ON c. Enterprises Small and medium teams Startups By use case --Write a query that prints a list of employee names (i. Also a bunch of terrible Hackerrank questions and solutions. → Output :6 Dec 23, 2024 · Samantha was tasked with calculating the average monthly salaries for all employees in the EMPLOYEES table, but did not realize her keyboard’s 0 key was broken until after completing the calculation. Advanced Sql. arr=($(cat)) echo ${#arr[@]} --Example: finding top 5 records from employee table select * from employee order by salary desc limit 5; --3> Write a SQL query to find the count of employees working in department 'Admin' select count (*) from employee where department = ' Admin '; --4> Write a SQL query to fetch department wise count employees sorted by department count in Jun 13, 2023 · The Problem We have an Employee and a Department table in a database. The Employee table containing employee data for a company is described as follows: where employee_id is an employee's ID number, name is their name, months is the total number of months they've been working for the company, and salary is the their monthly salary. SELECT salary*months, COUNT(*) FROM Employee GROUP BY 1 ORDER BY salary*months DESC LIMIT 1;--Query the following two values from the STATION Saved searches Use saved searches to filter your results more quickly Mar 12, 2024 · 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 Mar 15, 2024 · Output of above query. Mappers and Reducers. manager_code) AS Total Manager, COUNT(DISTINCT E. Mar 2, 2021 · HackerRank,SQL,Advanced Select,New Companies,MySQL,DB2,Hive,APDaga,DumpBox,Akshay Daga,LEFT JOIN,COUNT,DISTINCT,COL,Hierarchy, founder, manager total number of 6 days ago · Problem. Nov 23, 2022 · The only employee with earnings = 69952 is Kimberly, so we print the maximum earnings value (69952) and a count of the number of employees who have earned $ 69952 (which is 1) as two space-separated values. ; Add Explanations: Provide detailed explanations of code and problem-solving approaches. lead_manager_code) as no_of_lead_manager, count (distinct s. If you find any Feb 11, 2023 · The maximum earnings value is 69952. where LAT_N is the northern latitude and LONG_W is the western Oct 4, 2023 · Write a query to print the /Ds of the companies that have more than 10000 employees, in ascending order of ID. MySQL; Problem. Note: The tables may contain duplicate records HackerRank concepts & solutions. java Data Structures Stacks: Balanced Brackets 30 Solution. Nov 5, 2020 · 39. You switched accounts on another tab or window. I like that you didn't use any joins here, because this section implies that you should use "Advanced Select" technique rather than "Advanced Join" technique. Table of Contents. Output a single integer, the Small Triangles, Large Triangles HackerRank Solution; Post Transition HackerRank Solution; Structuring the Document HackerRank Solution; Codersdaily is the best IT training institute in Indore providing training and There are N problems numbered 1. Mar 2, 2021 · count (distinct l. com practice problems using Python 3, С++ and Oracle SQL - HackerrankPractice/SQL/03. Here’s a quick but comprehensive introduction to the idea of splitting tasks into a MapReduce model. Input Format Name ID NAME EMPLOYEES Type COMPANY. Difficulty. sql at main · Pavith19/HackerRank-SQL-Challenges-Solutions Write a query that prints a list of employee names (i. The Apr 22, 2021 · Click here to see solutions for all Machine Learning Coursera Assignments. where employee_id is an employee's ID number, name is their name, months is the total number of months they've been working for the company, Here am adding all the Hackerrank algorithm problem solutions in c, c++, java, Python, and javascript programming with practical program code examples. PRASHANTB1984. ; Multiple Language Implementations: Add solutions in other programming languages. Each rod has a unique mark on it. . Input Format COMPANY Name ID Type Description Integer A company ID in the inclusive range [1, 1000). java Data Structures Trees: Is This a Binary MySQL solution-select (salary * months)as earnings ,count(*) from employee group by 1 order by earnings desc limit 1; The solutions of all the SQL challenges for all easy, medium and hard challenges on HackerRank executed on MySQL environment compiled. There are two employees, E1 and E2, under manager M1. 80% of submissions on LeetCode. One more thing to add, don’t straight away look for the solutions, first try to solve the problems by yourself. The ROUND function is used to round the average age to the nearest integer. Team Formation HackerRank is organizing a chess tournament for its employees. Input Format. Contribute to evan999/HackerRank-Test-Exercises development by creating an account on GitHub. founder, COUNT(DISTINCT LM. zxdzia awhme nguyfa bvwgg qwwfb fioyk oadkse czzr izm yfb