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About. All gists Back to GitHub Sign in Sign up Sign in Sign up {{ message }} Instantly share code, notes, and snippets. A complete solution for SQL problems on HackerRank. SQL Puzzle | Employees count in Active Departments Puzzle | Frequent SQL SERVER Interview Question . Query a list of CITY names from STATION with even ID numbers only. 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. Difficulty. 3:07. 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. Revising Aggregations - The Count Function. Leaderboard. Query all columns (attributes) for every row in the CITY table. Problem Description. Introduction to SQL COUNT function. Hoping you guys can give some insight oh how to modify my query. Query a count of the number of cities in CITY having a Population larger than 100,000. The use of the patients table. 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. -----that means that my results should only give 7 lines (3 and 4 from departments sales and IT) Your result cannot contain duplicates. Solution: select Departments.deptName,COUNT(Employees.eDeptId) From departments LEFT Join Employees on Departments.deptId=Employees.eDeptId Group By Departments.deptId,Departments.deptName Order … Query all columns for a city in CITY with the ID 1661. Write a query that prints a list of employee names (i.e. Pivot the Occupation column in OCCUPATIONS so that each Name is sorted alphabetically and displayed underneath its corresponding Occupation. Ans. Employee Names. 12 Monday Feb 2018. Then print these values as space-separated integers. HackerRank (SQL) StackOverflow; About Me. Problem:- In computer science, a stack or LIFO (last in, first out) is an abstract data type that serves as a collection of elements, ... Error While embed the video in Your website page, Java Substring Comparisons HackerRank Solution in Java, A Very Big Sum :- HakerRank Solution in JAVA. 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. 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. PRASHANTB1984. SQL Notes: Hackerrank Employee Salaries Posted by Fan Ni on 2017-10-21 Toggle navigation Memogrocery. Climbing the leaderboard HackerRank Solution Write a query that prints a list of employee names (i.e. Query the list of CITY names from STATION that either do not start with vowels or do not end with vowels. Query the names of all American cities in CITY with populations larger than 120000. 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 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.e. The majority of the solutions are in Python 2. 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 … Ask Question Asked 3 years, 1 month ago. 15 days of Sql From hackerrank. In this post, we will be covering all the solutions to SQL on the HackerRank platform. +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. 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. : number of characters in the name). Write a SQL query to fetch the count of employees working in project ‘P1’. 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. Not A Triangle: The given values of A, B, and C don’t form a triangle. 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. Make learning your daily ritual. It’s one of the most sought languages desired by the employers as the volume of data is increasing, in order to access the humongous data from respective databases, it is important to know this skill which would help you retrieve, update and manipulate data. Contribute to sknsht/HackerRank development by creating an account on GitHub. Q.1. Write a SQL query to fetch the count of employees working in project ‘P1’. The following tables contain company data: Company: The company_code is the code of the company and founder is the founder of the company. SQL Notes: Hackerrank New Companies Posted by Fan Ni on 2017-10-21 Toggle navigation Memogrocery. Write a query that prints a list of employee names (i.e. In other words, find the difference between the total number of CITY entries in the table and the number of distinct CITY entries in the table. Skip to content . She wants your help finding the difference between her miscalculation (using salaries with any zeroes removed), and the actual average salary. Revising Aggregations - The Count Function. Write a query that prints a list of employee names (i.e. If more than one Occupation has the same [occupation_count], they should be ordered alphabetically. w3resource. Sort your result by ascending employee_id. 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. Some are in C++, Rust and GoLang. Q.2. The COUNTRYCODE for Japan is JPN. Hoping you guys can give some insight oh how to modify my query. Editorial. Home; About; Archives; Tags; Problem. See original HackerRank problem Results needed: show ONLY employees who are in the department with more than 2 employees. Then print these values as 2 space-separated integers. Hackerrank SQL 1) Query the two cities in STATION with the shortest and longest CITY names, as well as their respective lengths (i.e. SQL Notes: Hackerrank Employee Names Posted by Fan Ni on 2017-10-21 Toggle navigation Memogrocery. Discussions. Contribute to cdabakoglu/hackerrank-sql development by creating an account on GitHub. 317 efficient solutions to HackerRank problems. 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. Aggregation. Advanced SQL … The CITY table is described as follows: Author. 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. Some patients may not have any visits, and they are included. Tags. The output column headers should be Doctor, Professor, Singer, and Actor, respectively. : enclosed in parentheses). Open in app. Lead_Manager: The lead_manager_code is the code of the lead manager, and the company_code is the code of the working company. 1. Hands-on real-world examples, research, tutorials, and cutting-edge techniques delivered Monday to Thursday. 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. Max Score. : number of characters in the name). If two or more students both have names ending in the same last three characters (i.e. Amber’s conglomerate corporation just acquired some new companies. SQL Hackerrank. This Repository contain solutions to HackerRank 30 Days Of Code Challenge, 10 days of javascript,10 days of statistics,java,sql. The CountryCode for America is USA. Embed. : the name attribute) for employees in Employee having a salary greater than $2000 per month who have been employees for less than 10 months. This Repository contain solutions to HackerRank 30 Days Of Code Challenge, 10 days of javascript,10 days of statistics,java,sql. Problem. Output one of the following for each node: Inner: If node is neither root nor leaf node. S tructured query language (SQL) is used to retrieve and manipulate data stored in relational databases. Discussions. 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. Home; About; Archives; Tags; Problem. Contribute to RodneyShag/HackerRank_solutions development by creating an account on GitHub. 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 … Leaderboard. 3:07. 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. Home; About; Archives; Tags; Problem. Problem link— /* Harun-or-Rashid CSEDU-23rd Batch */ SELECT MAX(SALARYMONTHS), COUNT()FROM EMPLOYEEWHERE (SALARYMONTHS) = (SELECT MAX(SALARYMONTHS)FROM EMPLOYEE); Query the list of CITY names from STATION that do not start with vowels and do not end with vowels. Your result cannot contain duplicates. Then print these values as 2 space-separated integers. : the name attribute) from the Employee table in alphabetical order. Note: There will be at least two entries in the table for each type of occupation. : the name attribute) for employees in Employee having a salary greater than $2000 per month who have been employees for less than 10 months. Home; About; Archives; Tags; Problem. 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. Annotated solutions to HackerRank's SQL domain questions. Your result cannot contain duplicates. Get started. Note: Print NULL when there are no more names corresponding to an occupation. 1. My solutions to HackerRank problems. Climbing the leaderboard HackerRank Solution SQL HackerRank Solutions. SQL Notes: Hackerrank The PADS Posted by Fan Ni on 2017-10-21 Toggle navigation Memogrocery. A request to list "Number of employees in each department" or "Display how many people work in each department" is the same as "For each department, list the number of employees", this must include departments with no employees. HackerRank Type of Triangle Solution in hindi - SQL by TheGuidingBoy. 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. : number of characters in the name). Your result cannot contain duplicates. Skip to content . This another problem from HackerRank called Employee Salaries, Here is the SQL solution in MySQL environment.. 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. Leaderboard . Gaining working proficiency in SQL is an important prerequisite for many technology jobs and requires a bit of practice. Introduction. HackerRank Employee Salaries in hindi- SQL by TheGuidingBoy. See original HackerRank problem Need Help? If there is more than one smallest or largest city, choose the one that comes first when ordered alphabetically. Write a query that prints a list of employee names (i.e. Here, we use aggregate function count() with the SQL where clause. Description. Query a list of CITY and STATE from the STATION table. Input Format. 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. 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. Problem. Input Format The Employee table containing employee data for a company is described as follows: Column Type Submissions. Write a query identifying the type of each record in the TRIANGLES table using its three side lengths. 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 Sort your result by ascending employee_id. Here, we use aggregate function count() with the SQL where clause. - raleighlittles/HackerRank-SQL Editors' Picks Features Explore Contribute. Your result cannot contain duplicates. Revising Aggregations - The Count Function. Over the course of the next few (actually many) days, I will be posting the solutions to previous Hacker Rank challenges. Solution: select Departments.deptName,COUNT(Employees.eDeptId) From departments LEFT Join Employees on Departments.deptId=Employees.eDeptId Group By Departments.deptId,Departments.deptName Order by count(Employees.eDeptId) Desc, departments.deptName; Q2. Write a query that prints a list of employee names (i.e. 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. If there is more than one smallest or largest city, choose the one that comes first when ordered alphabetically. If there is more than one smallest or largest city, choose the one that comes first when ordered alphabetically. HackerRank MySQL - The Count Function Query a count of the number of cities in CITY having a Population larger than 100000. Output one of the following statements for each record in the table: Equilateral: It’s a triangle with 3 sides of equal length. - rutujar/HackerRank-solutions SQL Server does integer division on integers. 317 efficient solutions to HackerRank problems. 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. Results needed: show ONLY employees who are in the department with more than 2 employees. 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. Task. Query the list of CITY names from STATION that does not start with vowels. What would you like to do? 180644. HackerRank is a platform for competitive coding. The STATION table is described as follows: where LAT_N is the northern latitude and LONG_W is the western longitude. 3:59. The TRIANGLES table is described as follows: Each row in the table denotes the lengths of each of a triangle’s three sides. HackerRank SQL Solutions New Easter Egg from Google: How to play the Atari Breakout game on Google’s about us page? Aggregation. Query an alphabetically ordered list of all names in OCCUPATIONS, immediately followed by the first letter of each profession as a parenthetical (i.e. HackerRank SQL Solutions New Easter Egg from Google: How to play the Atari Breakout game on Google’s about us page? : the name attribute) from the Employee table in alphabetical order. This another problem from HackerRank called Employee Salaries, Here is the SQL solution in MySQL environment.. : enclosed in parentheses). Problem link— /* Harun-or-Rashid CSEDU-23rd Batch */ SELECT MAX(SALARYMONTHS), COUNT()FROM EMPLOYEEWHERE (SALARYMONTHS) = (SELECT MAX(SALARYMONTHS)FROM EMPLOYEE); : the name attribute) from the Employee table in alphabetical order. : Bobby, Robby, etc. The SQL COUNT function is an aggregate function that returns the number of rows returned by a query. 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. HackerRank Type of Triangle Solution in hindi - SQL by TheGuidingBoy. 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 … Submissions. Task. Created Apr 29, 2018. SELECT COUNT ( * ) FROM CITY WHERE POPULATION > 100000 ; Q.2. Problem:- Calculate and print the sum of the elements in an array, keeping in mind that some of those integers may be quite large. Top Earners. Ans. 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. Rahul Pathak. 10. Your result cannot contain duplicates. This is allowed. In HackerRank Tests, Database(DB) Engineering Questions assess the candidates' database querying knowledge in Microsoft SQL, MySQL, Oracle, or DB2 databases. The STUDENTS table is described as follows: The Name column only contains uppercase (A-Z) and lowercase (a-z) letters. Contact Me; Blog Rules; Improving my SQL BI Skills. Posted by Pawan Kumar Khowal in SQL Puzzles, SQL SERVER, SQL SERVER Puzzles, T SQL Puzzles, Tricky SQL Queries ≈ Leave a comment. Input Format. Employee Names. Query all columns for all American cities in CITY with populations larger than 100000. My public HackerRank profile here. Topics; Collections; Trending; Learning Lab; Open 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, … SELECT COUNT ( * ) FROM CITY WHERE POPULATION > 100000 ; Query the list of CITY names starting with vowels (i.e., a, e, i, o, or u) from STATION. +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. She wants your help finding the difference between her miscalculation (using salaries with any zeroes removed), and the actual average salary. GitHub Gist: instantly share code, notes, and snippets. SQL. The SQL COUNT function is an aggregate function that returns the number of rows returned by a query. Query all attributes of every Japanese city in the CITY table. The tables may contain duplicate records. For example: AnActorName(A), ADoctorName(D), AProfessorName(P), and ASingerName(S). It is very important that you all first give it a try & brainstorm yourselves before having a look at the solutions. Query the two cities in STATION with the shortest and longest CITY names, as well as their respective lengths (i.e. Write a query that prints a list of employee names (i.e. Query the number of occurrences of each occupation in OCCUPATIONS. Employee: The employee_code is the code of the employee, the manager_code is the code of its 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. Query the Name of any student in STUDENTS who scored higher than Marks. Solutions of SQL Challenges on HackerRank. Let us code and find answers to our given problems. This is allowed. In HackerRank Tests, Database(DB) Engineering Questions assess the candidates' database querying knowledge in Microsoft SQL, MySQL, Oracle, or DB2 databases. Problem Description. adrianofpereira / SELECT BÁSICO. SQL. Contribute to RodneyShag/HackerRank_solutions development by creating an account on GitHub. Submitted By. P(R) represents a pattern drawn by Julia in R rows. Contribute to sknsht/HackerRank development by creating an account on GitHub. Q.1. Easy. The use of nested subqueries in the select. Amber’s conglomerate corporation just acquired some new companies. The use of the patients table. Basic Select. 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. So a LEFT OUTER JOIN should be used. – Cruachan Nov 19 '08 at 12:59. Isosceles: It’s a triangle with 2 sides of equal length. Query the list of CITY names ending with vowels (a, e, i, o, u) from STATION. SQL Server does integer division on integers. SQL COUNT function: SQL COUNT function returns the number of rows in a table satisfying the criteria specified in the WHERE clause. What if you are trying to use the COUNT() as part of a boolean OR expression? The page is a good start for people to solve these problems as the time constraints are rather forgiving. Star 0 Fork 0; Star Code Revisions 1. Submissions. Query the list of CITY names from STATION that do not end with vowels. e.g. Sign up Why GitHub? - rutujar/HackerRank-solutions Sort your result by ascending employee_id. Hackerrank SQL 1) Query the two cities in STATION with the shortest and longest CITY names, as well as their respective lengths (i.e. Order your output by the last three characters of each name. Some patients may not have any visits, and they are included. SQL Notes: Hackerrank Employee Names Posted by Fan Ni on 2017-10-21 Toggle navigation Memogrocery. SQL. HACKERRANK SQL - EXERCICIOS RESOLVIDOS. ), secondary sort them by ascending ID. 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. : the name attribute) for employees in Employee having a salary greater than per month who have been employees for less than months. e.g. HackerRank MySQL - The Count Function Query a count of the number of cities in CITY having a Population larger than 100000. The CountryCode for America is USA. Structured Query Language is one of the most important languages used in the industry. The OCCUPATIONS table is described as follows: The occupation will only contain one of the following values: Doctor, Professor, Singer, or Actor. The COUNTRYCODE for Japan is JPN. Home; About; Archives; Tags; Problem. 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. Amber’s conglomerate corporation just acquired some new companies. In the sample database, Operations has 0 employees. 3:59. Home; About; Archives; Tags; Problem. The company_code is string, so the sorting should not be numeric. Revising Aggregations - The Count Function. Input Format The Employee table containing employee data for a company is described as follows: Column Type : the name attribute) from the Employee table in alphabetical order. : the name attribute) for employees in Employee having a salary greater than $2000 per month who have been employees for less than 10 months. Discussions . What if you are trying to use the COUNT() as part of a boolean OR expression? SQL Notes: Hackerrank New Companies Posted by Fan Ni on 2017-10-21 Toggle navigation Memogrocery. The use of nested subqueries in the select. Description. Query the names of all the Japanese cities in the CITY table. Display Department Details Write the SQL query to print the department … Order your output by ascending company_code. Features → Code review; Project management; Integrations; Actions; Packages; Security; Team management; Hosting; Mobile; Customer stories → Security → Team; Enterprise; Explore Explore GitHub → Learn & contribute. The following pattern represents P(5): Write a query to print the pattern P(20). 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. 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. 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. Your result cannot contain duplicates. Then print these values as space-separated integers. Scalene: It’s a triangle with 3 sides of differing lengths. Top Earners. 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. My solutions to HackerRank problems. Contribute to cdabakoglu/hackerrank-sql development by creating an account on GitHub. Query a count of the number of cities in CITY having a Population larger than . 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. 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 Problem. -----that means that my results should only give 7 lines (3 and 4 from departments sales and IT) 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. Query a count of the number of cities in CITY having a Population larger than 100,000. – Cruachan Nov 19 '08 at 12:59. Write a query that prints a list of employee names (i.e. HackerRank Employee Salaries in hindi- SQL by TheGuidingBoy. ... ( SELECT COUNT(distinct hacker_id) FROM Submissions s2 WHERE s2.submission_date = s1.submission_date AND ( SELECT COUNT(distinct s3.submission_date) FROM Submissions s3 WHERE s3.hacker_id = s2.hacker_id AND s3.submission_date < s1.submission_date ) = dateDIFF(s1.submission_date , '2016-03-01')) , ( select … You may print the results in any order but must exclude duplicates from your answer. 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

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