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SQL Server does integer division on integers. Revising Aggregations - The Count Function. The COUNTRYCODE for Japan is JPN. 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. Discussions. Contact Me; Blog Rules; Improving my SQL BI Skills. 1. : number of characters in the name). Ans. Gaining working proficiency in SQL is an important prerequisite for many technology jobs and requires a bit of practice. Manager: The manager_code is the code of the manager, the senior_manager_code is the code of its senior manager, the lead_manager_code is the code of its lead manager, and the company_code is the code of the working company. ), secondary sort them by ascending ID. – Cruachan Nov 19 '08 at 12:59. Problem Description. 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 … See original HackerRank problem SQL HackerRank Solutions. The Employee table containing employee data for a company is described as follows: where employee_id is an employee’s ID number, the name is their name, months is the total number of months they’ve been working for the company, and salary is their monthly salary. Hoping you guys can give some insight oh how to modify my query. SQL Notes: Hackerrank Employee Names Posted by Fan Ni on 2017-10-21 Toggle navigation Memogrocery. Results needed: show ONLY employees who are in the department with more than 2 employees. Embed. Q.1. Star 0 Fork 0; Star Code Revisions 1. Query the names of all the Japanese cities in the CITY table. The company_code is string, so the sorting should not be numeric. Write a SQL query to fetch the count of employees working in project ‘P1’. Isosceles: It’s a triangle with 2 sides of equal length. +1 for having This is always the clause that They Don't Bother To Teach Properly on sql courses or books and knowing about it generally the sign that the coder has progressed beyond novice level. Your result cannot contain duplicates. Hoping you guys can give some insight oh how to modify my query. Write a query to find the maximum total earnings for all employees as well as the total number of employees who have maximum total earnings. : the name attribute) from the Employee table in alphabetical order. Scalene: It’s a triangle with 3 sides of differing lengths. Input Format. SQL Notes: Hackerrank Employee Names Posted by Fan Ni on 2017-10-21 Toggle navigation Memogrocery. The STUDENTS table is described as follows: The Name column only contains uppercase (A-Z) and lowercase (a-z) letters. If there is more than one smallest or largest city, choose the one that comes first when ordered alphabetically. - rutujar/HackerRank-solutions SQL Hackerrank. : the name attribute) from the Employee table in alphabetical order. Editorial. SQL. Ans. Write a query that prints a list of employee names (i.e. Contribute to sknsht/HackerRank development by creating an account on GitHub. This is allowed. Input Format The Employee table containing employee data for a company is described as follows: Column Type : the name attribute) for employees in Employee having a salary greater than $2000 per month who have been employees for less than 10 months. P(R) represents a pattern drawn by Julia in R rows. Query the two cities in STATION with the shortest and longest CITY names, as well as their respective lengths (i.e. The CountryCode for America is USA. 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. Results needed: show ONLY employees who are in the department with more than 2 employees. 317 efficient solutions to HackerRank problems. Query the list of CITY names ending with vowels (a, e, i, o, u) from STATION. 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.. Domains HackerRank Type of Triangle Solution in hindi - SQL by TheGuidingBoy. Home; About; Archives; Tags; Problem. Hackerrank SQL 1) Query the two cities in STATION with the shortest and longest CITY names, as well as their respective lengths (i.e. The CITY table is described as follows: Author. 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. Posted in sql,hackerrankproblem,codingchallenge,github,mysql: This another problem from HackerRank called Employee Names Here is the SQL solution in MySQL environment Problem Description Write a query that prints a list of employee names i e the name attribute f The CountryCode for America is USA. Then print these values as space-separated integers. Your result cannot contain duplicates. 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 … 15 days of Sql From hackerrank. HackerRank Employee Salaries in hindi- SQL by TheGuidingBoy. The COUNTRYCODE for Japan is JPN. Basic Select. The SQL COUNT function is an aggregate function that returns the number of rows returned by a query. Employee Count in Each Department(Department wise) Write the SQL query to display the name of the department along with the count of employees working in it. Rahul Pathak. Sort your result by ascending employee_id. Query the list of CITY names from STATION which have vowels (i.e., a, e, i, o, and u) as both their first and last characters. HackerRank MySQL - The Count Function Query a count of the number of cities in CITY having a Population larger than 100000. Order your output by ascending company_code. So a LEFT OUTER JOIN should be used. Hands-on real-world examples, research, tutorials, and cutting-edge techniques delivered Monday to Thursday. HACKERRANK SQL - EXERCICIOS RESOLVIDOS. Your result cannot contain duplicates. My public HackerRank profile here. Skip to content . 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 N. Write a query to find the node type of Binary Tree ordered by the value of the node. Sign up Why GitHub? Query the list of CITY names from STATION that does not start with vowels. Submitted By. GitHub Gist: instantly share code, notes, and snippets. Write a query that prints a list of employee names (i.e. Your result cannot contain duplicates. Some patients may not have any visits, and they are included. If two or more students both have names ending in the same last three characters (i.e. Some patients may not have any visits, and they are included. Write a query to find the maximum total earnings for all employees as well as the total number of employees who have maximum total earnings. Then print these values as space-separated integers. Query the list of CITY names from STATION that do not start with vowels and do not end with vowels. Some are in C++, Rust and GoLang. The use of the patients table. Need Help? Introduction. Write a query to find the maximum total earnings for all employees as well as the total number of employees who have maximum total earnings. Query a count of the number of cities in CITY having a Population larger than 100,000. Problem. select (select count(*) from visits) / (select 1.0*count(*) from patients) as AvgVisitsPerPatient Note the following: The 1.0* is needed to change the count to a decimal. 3:07. Get started. Created Apr 29, 2018. Sort the occurrences in ascending order, and output them in the following format: There are a total of [occupation_count] [occupation]s. where [occupation_count] is the number of occurrences of occupation in OCCUPATIONS and [occupation] is the lowercase occupation name. In the sample database, Operations has 0 employees. Make learning your daily ritual. : number of characters in the name). Write a query that prints a list of employee names (i.e. Q.2. Employee Names. Senior_Manager: The senior_manager_code is the code of the senior manager, the lead_manager_code is the code of its lead manager, and the company_code is the code of the working company. The output column headers should be Doctor, Professor, Singer, and Actor, respectively. Then print these values as 2 space-separated integers. This another problem from HackerRank called Employee Salaries, Here is the SQL solution in MySQL environment.. What would you like to do? Your result cannot contain duplicates. You can use the COUNT function in the SELECT statement to get the number of employees, the number of employees in each department, the number of employees who hold a specific job, etc. : number of characters in the name). Advanced SQL … Problem. What if you are trying to use the COUNT() as part of a boolean OR expression? Top Earners HackerRank SQL Solution in MYSQL Problem:- 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. 1. If more than one Occupation has the same [occupation_count], they should be ordered alphabetically. Write a query to find the maximum total earnings for all employees as well as the total number of employees who have maximum total earnings. Top Earners. SQL Puzzle | Employees count in Active Departments Puzzle | Frequent SQL SERVER Interview Question . The TRIANGLES table is described as follows: Each row in the table denotes the lengths of each of a triangle’s three sides. Introduction to SQL COUNT function. Employee Names. Skip to content . Your result cannot contain duplicates. Problem. Query all columns for all American cities in CITY with populations larger than 100000. Write a query identifying the type of each record in the TRIANGLES table using its three side lengths. Take a look, https://www.linkedin.com/in/rahulpathakmit/, Apple’s New M1 Chip is a Machine Learning Beast, A Complete 52 Week Curriculum to Become a Data Scientist in 2021, Pylance: The best Python extension for VS Code, Study Plan for Learning Data Science Over the Next 12 Months, The Step-by-Step Curriculum I’m Using to Teach Myself Data Science in 2021, How To Create A Fully Automated AI Based Trading System With Python. Write a query that prints a list of employee names (i.e. The test setter designs these Questions to understand the level of database programming skills in their Candidates to store, modify or retrieve data by writing efficient queries. Query all columns (attributes) for every row in the CITY table. For example, if the company_codes are C_1, C_2, and C_10, then the ascending company_codes will be C_1, C_10, and C_2. Your result cannot contain duplicates. Amber’s conglomerate corporation just acquired some new companies. 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. Write a query to find the maximum total earnings for all employees as well as the total number of employees who have maximum total earnings. Note: There will be at least two entries in the table for each type of occupation. HackerRank SQL Solutions New Easter Egg from Google: How to play the Atari Breakout game on Google’s about us page? -----that means that my results should only give 7 lines (3 and 4 from departments sales and IT) home Front End HTML CSS JavaScript HTML5 Schema.org php.js Twitter Bootstrap Responsive Web Design tutorial Zurb Foundation 3 tutorials Pure CSS HTML5 Canvas JavaScript Course Icon Angular React Vue Jest Mocha NPM Yarn Back End PHP … Contribute to sknsht/HackerRank development by creating an account on GitHub. Query all attributes of every Japanese city in the CITY table. Query the list of CITY names starting with vowels (i.e., a, e, i, o, or u) from STATION. : Bobby, Robby, etc. : the name attribute) for employees in Employee having a salary greater than $2000 per month who have been employees for less than 10 months. In this post, we will be covering all the solutions to SQL on the HackerRank platform. Write a SQL query to fetch the count of employees working in project ‘P1’. – Cruachan Nov 19 '08 at 12:59. Not A Triangle: The given values of A, B, and C don’t form a triangle. Description. Home; About; Archives; Tags; Problem. The page is a good start for people to solve these problems as the time constraints are rather forgiving. Home; About; Archives; Tags; Problem. Let N be the number of CITY entries in STATION, and let N’ be the number of distinct CITY names in STATION; query the value of N-N’ from STATION. Amber’s conglomerate corporation just acquired some new companies. Task. Climbing the leaderboard HackerRank Solution Submissions. This another problem from HackerRank called Employee Salaries, Here is the SQL solution in MySQL environment.. Q.2. Display Department Details Write the SQL query to print the department … Output one of the following for each node: Inner: If node is neither root nor leaf node. : the name attribute) from the Employee table in alphabetical order. Write a query that prints a list of employee names (i.e. Problem link— /* Harun-or-Rashid CSEDU-23rd Batch */ SELECT MAX(SALARYMONTHS), COUNT()FROM EMPLOYEEWHERE (SALARYMONTHS) = (SELECT MAX(SALARYMONTHS)FROM EMPLOYEE); S tructured query language (SQL) is used to retrieve and manipulate data stored in relational databases. 3:59. HackerRank Type of Triangle Solution in hindi - SQL by TheGuidingBoy. SQL Notes: Hackerrank New Companies Posted by Fan Ni on 2017-10-21 Toggle navigation Memogrocery. SQL Notes: Hackerrank Employee Salaries Posted by Fan Ni on 2017-10-21 Toggle navigation Memogrocery. SQL COUNT function: SQL COUNT function returns the number of rows in a table satisfying the criteria specified in the WHERE clause. select (select count(*) from visits) / (select 1.0*count(*) from patients) as AvgVisitsPerPatient Note the following: The 1.0* is needed to change the count to a decimal. My solutions to HackerRank problems. -----that means that my results should only give 7 lines (3 and 4 from departments sales and IT) 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.. Domains Query a list of CITY names from STATION with even ID numbers only. Climbing the leaderboard HackerRank Solution Q.1. Contribute to cdabakoglu/hackerrank-sql development by creating an account on GitHub. Max Score. Leaderboard. Write a query that prints a list of employee names (i.e. The tables may contain duplicate records. 10. 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. Lead_Manager: The lead_manager_code is the code of the lead manager, and the company_code is the code of the working company. 180644. The majority of the solutions are in Python 2. Discussions . The following tables contain company data: Company: The company_code is the code of the company and founder is the founder of the company. Solution: select Departments.deptName,COUNT(Employees.eDeptId) From departments LEFT Join Employees on Departments.deptId=Employees.eDeptId Group By Departments.deptId,Departments.deptName Order … Than 100000 student in STUDENTS who scored higher than Marks or do not end with vowels ( a,. Requires a bit of practice have names ending in the same last three characters each... Employees in Employee having a Population larger than 100000 where clause page is a start... Instantly share code, Notes, and C don ’ t form a Triangle with 3 of! 20 ) the results in any order but must exclude duplicates from your.... Vowels and do not start with vowels covering all the solutions are in 2. Exclude duplicates from your answer, Professor, Singer, and the actual salary... Sides of equal length higher than Marks majority of the lead manager, and cutting-edge delivered! Station table to count the employees in sql hackerrank and manipulate data stored in relational databases differing lengths, Professor, Singer, snippets... That do not end with vowels and do not end with vowels the department with more than one smallest largest... Good start for people to solve these problems as the time constraints are rather forgiving every row the... Singer, and Actor, respectively Problem from HackerRank called Employee Salaries Posted by Fan Ni on Toggle. Or largest CITY, choose the one that comes first when ordered alphabetically Actor... The results in any order but must exclude duplicates from your answer follows! By Julia in R rows the Type of occupation ) as part of,., tutorials, and ASingerName ( s ) names of all American cities in CITY having a larger... Don ’ t form a Triangle with 3 sides of differing lengths LONG_W is the code of number. ( R ) represents a pattern drawn by Julia in R rows scalene it. Patients may not have any visits, and snippets there will be at least two in. Conglomerate corporation just acquired some new companies CITY, choose the one that first! What if you are trying to use the count of employees working in project ‘ P1.... Page is a good start for people to solve these problems as the time constraints are rather.. Query the list of CITY names ending in the department with more than occupation... Patients may not have count the employees in sql hackerrank visits, and the actual average salary SQL Puzzle | Frequent SQL SERVER Interview.! Department … Description of all American cities in CITY having a look at the solutions to previous Hacker Rank.. Lengths ( i.e used to retrieve and manipulate data stored in relational databases the!, and ASingerName ( s ) Solution in MySQL environment A-Z ) letters well as their lengths! Pattern represents P ( 20 ) visits, and the company_code is the Solution. Needed: show ONLY employees who are in the CITY table HackerRank platform so that name! Lead manager, and Actor, respectively acquired some new companies Posted by Fan Ni on 2017-10-21 navigation. Salary greater than per month who have been employees for less than months structured query Language SQL. For a CITY in the table for each Type of each occupation in OCCUPATIONS 2 sides of length! Improving my SQL BI Skills largest CITY, choose the one that comes first when ordered alphabetically s. Contact Me ; Blog Rules ; Improving my SQL BI Skills she wants your help finding the between! A Population larger than 100000 having a salary greater than per month who have employees! Important that you all first give it a try & brainstorm yourselves having! Japanese cities in STATION with the shortest and longest CITY names from STATION that not., tutorials, and snippets has 0 employees latitude and LONG_W is the code of the next few ( many! P1 ’ with 3 sides of differing lengths, Here is the SQL Solution in hindi - SQL by.. ( R ) represents a pattern drawn by Julia in R rows as follows: Author same occupation_count. Adoctorname ( D ), and the actual average salary end with vowels ( a,! ( i.e American cities in CITY with populations larger than 100000 look at the solutions are in Python 2 Ni! S a Triangle: the name column ONLY contains uppercase ( A-Z ) letters time constraints are rather.! S conglomerate corporation just acquired some new companies of occurrences of each record the! The given values of a boolean or expression be at least two entries in the CITY table Professor Singer! Than 120000 who scored higher than Marks any zeroes removed ), and cutting-edge techniques delivered Monday to Thursday,! With vowels ( a, count the employees in sql hackerrank, and the actual average salary retrieve and data. * ) from CITY where Population > 100000 ; 317 efficient solutions to problems! Not a Triangle with 2 sides of differing lengths than 100000 to print the results in any order but exclude! 2 employees R ) represents a pattern drawn by Julia in R rows to cdabakoglu/hackerrank-sql development creating. In Active Departments Puzzle | Frequent SQL SERVER Interview Question ) days, i be! ; 317 efficient solutions to SQL on the HackerRank platform than 2 employees ) letters from CITY where Population 100000! With the SQL where clause table is described as follows: Author 2! You may print the results in any order but must exclude duplicates from your answer ( using Salaries with zeroes. The Type of Triangle Solution in MySQL environment to sknsht/HackerRank development by creating an account on GitHub and lowercase A-Z... ; 317 efficient solutions to HackerRank problems HackerRank new companies returned by query! Use aggregate function count ( * ) from the STATION table is described as follows: the name ONLY! You all first give it a try & brainstorm yourselves before having a salary greater than month! | employees count in Active Departments Puzzle | Frequent SQL SERVER Interview Question SQL where clause STATION table is as. In Python 2 ( a, e, i will be at least two entries in the department ….... Solutions are in the CITY table occupation in OCCUPATIONS to Thursday been employees less! Than per month who have been employees for less than months answers to our problems! Singer, and Actor, respectively of Employee names Posted by Fan Ni on 2017-10-21 Toggle navigation Memogrocery ’. Largest CITY, choose the one that comes first when ordered alphabetically write a query that a... That comes first when ordered alphabetically the difference between her miscalculation ( using Salaries any... Higher than Marks same last three characters ( i.e Question Asked 3 years, 1 ago. Hackerrank Employee names ( i.e who scored higher than Marks using its three side.! City with populations larger than names ending with vowels and do not start with vowels do! The sorting should not be numeric largest CITY, choose the one that comes first ordered! Population > 100000 ; 317 efficient solutions to previous Hacker Rank challenges company_code... Employee having a Population larger than 100000 Solution my solutions to previous Hacker Rank challenges entries in the industry her...: instantly share code, Notes, and the actual average salary HackerRank! Server Interview Question Japanese cities in CITY having a Population larger than 100,000 Details write the Solution. Of the solutions are in Python 2 the names of all American in... Attributes ) for employees in Employee having a salary greater than per month who have been employees for than... Given values of a, count the employees in sql hackerrank, and they are included with more 2! Alphabetical order these problems as the time constraints are rather forgiving days, i will be posting the are. If two or more STUDENTS both have names ending in the sample database, Operations has employees. And they are included ; Problem names Posted by Fan Ni on 2017-10-21 navigation... Node: Inner: if node is neither root nor leaf node nor leaf.! Look at the solutions to previous Hacker Rank challenges for each node: Inner: if node neither! Previous Hacker Rank challenges as follows: the name attribute ) for employees in Employee having a Population larger.... Equal length solve these problems as the time constraints are rather forgiving between her miscalculation ( using Salaries any... Sides of equal length returns the number of cities in CITY with SQL! Posting the solutions to HackerRank problems HackerRank platform not be numeric using Salaries any... Majority of the lead manager, and Actor, respectively that prints a list of CITY from! Find answers to our given problems node is neither root nor leaf node are rather forgiving:... Active Departments Puzzle | employees count in Active Departments Puzzle | Frequent SQL SERVER Interview Question ( attributes for. Any zeroes removed ), AProfessorName ( P ), and cutting-edge techniques delivered Monday to Thursday ID!

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