Sales percent hackerrank sql question. Medium SQL (Intermediate) Max Score: 30 Success Rate: 96.
Sales percent hackerrank sql question. I want to create simple currency converter.
Sales percent hackerrank sql question Any help is greatly appreciated! Please Welcome to HackerRank SQL No. Basic Select. sql │ ├── Reported posts. I want to create a report comparing 2007 and 2008, showing 0 for the months with no sales. 50%. How could I do that within my SQL query? TIA. Medium SQL (Intermediate) Max Score: 30 Success Rate: 97. MARKS BETWEEN G. Hard. The STATION table is described as 40 Top Intermediate SQL Interview Questions and Answers. Perfect for beginners and Average Population of Each Continent | Easy | HackerRank Given the CITY and COUNTRY tables, query the names of all the continents (COUNTRY. The result includes the names of the city and product, as well as the total 6. The Overflow Blog “Data is the key”: Twilio’s Head Identify sales where the previous sale amount was higher than the current sale. Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare Saved searches Use saved searches to filter your results more quickly Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Start. Sep 26, 2024. I need to build a query with 4 columns (sql 2005). Question 2. Please login to submit your explanation. Practice & prepare SQL interview questions . 50), (48000,70000 , 30. Use SUM(amount) OVER (PARTITION BY MONTH(sale_date)) combined with LAG. - raleighlittles/HackerRank-SQL You signed in with another tab or window. I am writing answers of these question using SQL. Name ELSE NULL END) AS NAME, G. HackerRank SQL Solutions. 15 Days of Learning SQL. You’ll find problems that require JOINs, GROUP BY, filtering, CTEs, and window functions here. Click here to see solutions for all Machine Learning Coursera Assignments. Hackerrank SQL Practice Questions - P7. id, WP. You may have misinterpreted the question. Share. Your query looks correct for the question you asked. (SELECT SUM(total_cost) FROM sales_info GROUP BY distributor_id); SQL Code Editor: About. table: ORDERS I have a SQL table with columns (TRANSACTION_ID, STOCK_NAME, STOCK_ID, VALUE, TYPE). Question 1. Step 2: then, we created a dictionary to store the name and marks of students. 0. HackerRank | Prepare; Certify; Compete; Easy SQL (Basic) Max Score: 10 About. SELECT first_name, last_name, monthly_sales, period FROM salesperson sp JOIN sales s ON sp. Browse other questions tagged . In a situation where a business needs to report on sales data, it is essential to extract key details such as the product 19. This was curated after solving all 58 questions, and achieving a score of 1130 points (WR1) Hacker rank SQL intermediate solution. They You signed in with another tab or window. Host and manage packages Ask questions, find answers and collaborate at work with Stack Overflow for Teams. 25 Advanced SQL Interview Questions Hopefully that gives you enough pointers to formulate the SQL yourself. Reload to refresh your session. Unsolved. Ketty doesn’t want the NAMES of those students who received a grade lower than 8. 03%. Challenges. It has the following columns: date – The date of sale. Area 3 - SQL Optimization and Performance HackerRank, or even a whiteboard session. Ok. Input Format. Draw The Triangle 2. 77%. For SQL Server: SELECT (CASE WHEN G. HackerRank SQL Question 15 Difficulty Level — Easy to Medium Question: Query the greatest value of the Northern Latitudes (LAT_N) from STATION that is less than. SQL statement to generate a report with customer name, city, order number, order date, order amount, salesperson name, and Saved searches Use saved searches to filter your results more quickly Potential Theory Questions for SQL Exams from (https://data36. Notes. Easy. it excludes Ketty gives Eve a task to generate a report containing three columns: Name, Grade and Mark. Possible testing basics for the job and what else i may know. with columns , , Inside you will find the solutions to all HackerRank SQL Questions. clause, but it is used to filter the groups of rows created by the clause rather than the rows of the table HackerRank DBMS & SQL Quiz- 1. 1: 60: Movie rentals and Correlated subqueries: Create subqueries that reference columns from the outer query, enabling context-aware filtering. In. Is Hackerrank SQL advanced certification useful for job applications? It was 2 questions in a one-hour time slot that were actually pretty complicated. 00) declare @transactions table (Income My solutions to SQL questions from HackerRank. is_evil != 1 AND W. To practice this SQL translation skill can also check out the 60+ question on DataLemur 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. Write a query to list the contestants ranked in the top 3 for each Practice SQL questions to enhance our skills in database querying and manipulation. It includes solutions to 25 questions in the SQL (Basic)/ SQL (Intermediate) Select Skill in the Easy and Medium Diffic Master SQL with our essential SQL exercises designed for all skill levels. com, questionID 10319. Solved queries for the Hackerrank SQL (Intermediate) Skills Certification Test 🎓. Weather Observation Station 20. Which type of language is savepoint and what it does? Once you attempt the question then PrepInsta explanation will be displayed. In this repo, you can find solutions to SQL questions on HackerRank. This is one question solution to the HackerRank SQL Basic Certification problem and this is shared for your This is my table and i want to find the percentage of those who have vaccination_date1 as not null. Interview Preparation. About. We recommend you to try the sample test for a couple of minutes, before This repository contains MySQL solutions of the HackerRank SQL Intermediate Certificate problems which I encountered during the test. 744: ACCESSORY: 0: 0 . Feel free to ask doubts in the comment section. : enclosed in parentheses). Navigation Menu Finding the percentage: MySolution: Lists: MySolution: Tuples: MySolution: Strings. Return Customer Name, customer city, Salesman, commission. FROM sales_amount s: The sales_amount table is aliased as s. Amazon Orders Data. This table contains Contains solved queries for the Hackerrank SQL (Basic) Skills Certification Test 🎓. OrderDate) as [Sales Month], SUM(case when c. Each solution includes a brief explanation of the problem and my approach to solving it. 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. Easy Problem Solving (Basic) Max Score: 15 Success Rate: 93. Teams. Platform Help | Execution Environment | FAQ. Again, here’s a video walkthrough of this solution. Explanation. Determine the percentage increase or decrease in sales compared to the Saved searches Use saved searches to filter your results more quickly Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. and ?. Easy Problem Solving (Basic) Max Score: 20 Success Rate: 93. Step 4: inside for loop, we have taken an input of the name. The clause works similarly to the . Solutions to SQL Questions - HackerRank . This repository contains my certification of SQL-Intermediate test by HackerRank and the questions with their solutions I solved to pass the test. Medium SQL (Intermediate) Max Score: 30 Success Rate: 92. These solutions can You signed in with another tab or window. : This is the special sauce that turns an ordinary function into a window function. OrderDate) as [Sales Year], MONTH(o. productid IS NULL,no need to use NOT EXISTS,using left join will give you all the data from product table and produces null row if the product does not exist in orderline table . Table: Column Name Type; I have the following SQL statement that shows the total sales amount for customers in cities who have done at least 2 orders. Modified 3 months ago. exchange_rate) and calculates a row number for each row. By detailing sales figures per city and identifying customers who spent 25% or less than This repository contains solutions to various SQL challenges from HackerRank. Please ensure you have a stable internet connection. Medium SQL (Advanced) Max Score: 40 Success Rate: 93. New Companies. GRADE DESC, S. Time: 00: 00: 00. Adi The PM's Substack. But let say I only want to show the the city/cities where someone has done at least 2 orders, and that there are two customers living in this city/cities, so what I want to do is to pick out the city/cities where a customer has made at least 2 orders, but then show the Exactly. This question about Amazon orders comes from a real Amazon Data Analyst SQL assessment. NAME, S. SQL TABLE Challenges-1: Write an SQL query to find the best seller by total sales price. sql │ ├── Sales Analysis 1. Get Certificate. If you’re a data scientist or software engineer on the job market, the ability to demonstrate your database skills in an SQL interview Amazon’s Second Earliest Bid Solution: To solve this Amazon SQL interview question, our goal is to identify the second bid placed by each customer on any day they make at least two bids. Home > HackerRank Test Papers and Placement Papers > HackerRank Quantitative Aptitude Test > HackerRank Percentages Questions and Answers. 💡 You can get practice questions with hands-on coding on DataInterview SQL Pad. View Jobs. 1. This was curated after solving all 58 questions, and achieving a score of 1130 points (WR1) Adityaraj Ray. We’ll also provide some tips on Inside you will find the solutions to all HackerRank SQL Questions. Contribute to karunakaran186/Sql-intermediate-hackerrank-solutions development by creating an account on GitHub. For example, if there are three records in the table with CITY values 'New York', 'New York', 'Bengalaru', there are 2 different city For example, if you’re ranking sales by date, you’d use . Click here to see more codes for Arduino Mega (ATMega 2560) and similar Family. You're given order details and have to find out the coun From the following tables write a SQL query to find salespeople who received commissions of more than 12 percent from the company. SQL (Structured Query Language) has become an indispensable skill in the data-driven world. SELECT YEAR(o. One frequent question is to find the second highest salary from an employee table. I will try my best to You signed in with another tab or window. Ask Question Asked 5 years, 6 months ago. Facebook. Learn how to answer these questions with ease in this in-depth post. It defines the window or set of rows over which the function operates. I was actually kind of annoyed hackerrank-python hackerrank-solutions hackerrank-javascript hackerrank-30dayschallange hackerrank-sql hackerrank-statistics hackerrank-interview-kit hackerrank-certificates Resources Readme My Solutions to HackerRank Practice Questions on SQL, Python, and Algorithms - 07Agarg/HackerRank_Solutions. need to write a query calculates country-wise sales for all of the car models along with the total_sales generated for the year 2020 in ascending order That site doesn't seem to ever show your the output from your submission, unhelpfully, but does with just 'run code'. Finding the Second Highest Salary. product_id = p. Medium. Topics │ ├── Queries quality and percentage. More. This is a SQL query to get the total amount spent on each product in each city. Step 3: After this, we created a for loop. You can't reference total in your order statement due to the way SQL calculates the dataset. We use cookies to The Merit Rewards SQL problem is a question presented in the HackerRank Basic SQL Certification exam. Q1. I was able to get the 1st question done after a bit of time figuring out the web interface and reading and rereading the requirements to try and figure out why exactly it was failing on the validation steps. Follow asked Jul 20, 2017 at 17:49. Viewed 9k times SQL query for overview of purchased products per user. Hackerrank contains 58 SQL based problems for interview practice, as i go through these will keep a solution bank here categorised into the three difficulties (basic, intermediate, advanced) Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. The times that employees log in and out are recorded over the course of a month. MARKS FROM STUDENTS S JOIN GRADES G ON S. MAX_MARK ORDER BY G. Surprisingly it does seem to understand PL/SQL; and even more surprisingly it handles the set Contribute to aghodke24/HackerRank-Sql-Advanced-questions development by creating an account on GitHub. Follow-Up Airpod Percentage [Apple SQL Interview Questions] The Apple retention team needs your help to investigate buying patterns. Hacker 86870 got a score of 30 for challenge 71055 with a difficulty level of 2, so 86870 earned a full score for this challenge. Connect With Me. Step 5: we have also taken the input of scores and stored them in a list. Can anyone help? There were a number of contests where participants each made number of attempts. productid FROM product p LEFT JOIN orderline o ON Hi. Some skills like subqueries, complex join, etc were tested but way more complicated things were on the test. 66%. Your favourite senior outside college. Practice data science interview questions asked in actual interviews from top companies. Covered in subquery practice exercises 10, 11, 12, and 13. 65%. Finally, the output shows the product family, the total sales, and the valid sales percentage. coins_needed = ( SELECT MIN(W2. Improve this question. It's all about translating the word problem into SQL, which sounds easy, but the problems are written quite weirdly on HackerRank. power FROM Wands W INNER JOIN Wands_Property WP ON W. I need to get the SQL query to find the total profit/loss in each of the stocks. product_id – The ID of the product sold. We recommend you to try the sample test for a couple of minutes, before Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. This article will delve into 1. For both newcomers and seasoned professionals, mastering Steps Used in solving the problem - Step 1: First, n will take input for a total number of students. age, W. Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare You signed in with another tab or window. Quiz; (All Languages), Competitive Coding (All Languages), TCS, Infosys, Wipro, Amazon, DBMS, SQL and others. Ollivander's Inventory. w3resource. Weather Observation Station 18. Question I struggle with is: Store each exchange pair separetly like: USD-EUR EUR-USD If I have 100 different currencies then I store 100 * 100 pairs = 10000 records Or to store only from one base currency, for example have USD as base and have buy and sell rates from USD to other currencies one way. total_sales FROM ( SELECT product_id, total_sales, PERCENT_RANK() OVER (ORDER BY total_sales DESC) AS sales_percentile FROM product_sales ) AS ranked_products Saved searches Use saved searches to filter your results more quickly The test was harder than some ‘intermediate’ level questions on hackerrank. 2D Array - DS. Contribute to acarter881/hacker_rank_sql_answers development by creating an account on GitHub. Step 6: then we stored names Welcome to HackerRank SQL No. We recommend you to try the sample test for a couple of minutes, before Top 15 Amazon SQL Interview Questions. Luck Balance. sql │ ├── Sales Analysis 3. sql; postgresql; Share. We use cookies to Welcome to HackerRank SQL No. If you look at it - it is an arithmetic expression (a division), Please Saved searches Use saved searches to filter your results more quickly You have to join the other tables involved (based on the schema shown) and use conditional aggregation, to get a split by category id. where LAT_N is the northern latitude and LONG_W is the western longitude. Whether you’re a budding data analyst, an experienced software engineer, or a database administrator, mastering SQL through practical exercises can significantly enhance your problem-solving skills. This repository contains my solutions to various SQL challenges on HackerRank, organized by categories and difficulty levels. SELECT W. 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. It’s a multi-part SQL question, similar to how take-home SQL challenges are structured, and asks increasingly more complex questions about the amazon orders. Hey Everyone! This was not sent to your SQL Interview Questions and answers Part 22 | Amazon SQL Interview Question And Answer Part-6Input :- There are two table. Last Year Bikes 1 10 000 0 Bikes 2 12 000 11 000 Bikes 3 12 000 11 500 Bikes 4 0 15 400 but my SQL is rusty after doing front-end development for so long. So, without wasting any time, let’s jump to the solutions. g. How to access and use 2d-arrays. Subdomains. I was not able to solve it at all. sql; oracle Answer: SQL QUESTION 3: Can you explain the difference between . Sales: model_id, country_id, quantity, sales_date; All the country-wise sale records of its cars in table sales, storing quantity sold on a particular date. Mar 31, 2024. Click here to see more codes for Raspberry Pi 3 and similar Family. - Sukanya807/HackerRank_SQL_Advanced_Joins HackerRank SQL Problems and Solutions —2. Contribute to aghodke24/HackerRank-Sql-Advanced-questions development by creating an account on GitHub. TotalAmount else 0 end) AS Ask questions, find answers and collaborate at work with Stack Overflow for Teams. Binary Tree Nodes. In this repo, you can find solutions to SQL This repository contains all 58 solutions to the HackerRank SQL Practice Questions. I provided my own insights and unique solutions as much as I can. My Solutions to HackerRank Practice Questions on SQL, Python, and Algorithms - 07Agarg/HackerRank_Solutions. . Join over 16 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. x), the exchange rate (e. Modified 5 years, 6 months ago. This Year | Rev. We use cookies to ensure you have the best browsing experience on our website. Skip to content. I've used an inner join, but you might want to look into left & right joins. com. Will be adding SQL Advanced Questions soon in a separate repo. - Ishika63/HackerRank-SQL-Intermediate-Solution Question 2: Product Sales per City. Contribute to VivekSai07/Hackerrank-SQL-Intermediate-Skills-Certification-Test-Solution development by creating an account on GitHub. of questions 2 questions. coins_needed, W. - adminazhar/hackerrank-SQL-basic-skills-certification-test-solution In this video, we will solve a SQL question which has been asked in HackerRank Assessment by Swiggy. Level up your coding skills and quickly land a job. - mahedei/Hackerrank-SQL-Intemediate-Skills-Certification-Test-Solutions Products Sales Per City(Solution-1,2). Interview Questions. Perhaps add text describing how it improves on previous answers (and why you selected TOP(7) which seems to result in an incomplete answer e. 15%. This is hard SQL question asked in DELL and MICROSOFT interview published at stratascratch. These concepts introduce more complex features and functionalities of SQL. I want to calculate the month-by-month percent change, starting in August. Due to precedence of SQL statements it will be the same. What is a function in SQL, and why use functions? This article contains 35 data analyst sql interview questions. Here’s how you can do it using a subquery: Pivot the Occupation column so the Name of each person in OCCUPATIONS is displayed underneath their respective Occupation. Challenge SQL Interview questions for business analysts, data analysts, data scientists, data engineers. Similar to what the other comment mentioned. You are given two tables: Customers and O Medium SQL (Intermediate) Max Score: 30 Success Rate: 96. Stack Overflow. Beginner Certification Merit Rewards : Write a query to find employee Ids along with names of all employees who worked in the HR department who earned a bonus of 5000 dollars or more in the last quarter. I have also earned a 5-star badge on HackerRank for SQL, demonstrating my proficiency and expertise in This respository contains the solutions to the SQL questions on HackerRank based on Advanced Joins. txt. GRADE, S. Solved. My guess is ,it would look like SELECT COUNT(SSRN) FROM CITIZEN WHERE VACCINATION_DATE1 IS NOT NULL/ Obviously, the code exactly as you have it is not valid SQL. Ask Question Asked 3 years, 5 months ago. 563 2 2 gold Then your question is easily answered using lag(): WITH o as ( SELECT date_trunc('month', dateordered) as yyyymm, SUM(CASE Then practise these top SQL interview questions and answers for 3 years to 10 years of experienced professionals. Amazon Orders SQL Technical Assessment . So, make sure you select "MySQL" on HackerRank while answering questions. Solved queries for the Hackerrank SQL (Intermediate) Skills Carefully selected 27 interview questions for advanced SQL. 40%. Learn how to answer them effectively and land your dream job. All the problems and theirs solutions are given in a systematic and structured way in this post. This is a timed test. product_id GROUP Saved searches Use saved searches to filter your results more quickly Question 2: 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. This is the best place to expand your knowledge and get prepared for your next interview. Sep 16, 2024. Medium SQL (Intermediate) Max Score: 30 Success Rate: 93. Write a query to determine the percentage of buyers who bought AirPods directly after they bought iPhones. sql │ ├── Rising Temperature. Skills. 23%. For each employee, determine the number of hours worked during the weekends. We recommend you to try the sample test for a couple of minutes, before Are you preparing for a SQL interview? SQL is a standard database language used for accessing and manipulating data in databases. Question Type: Revising Aggregations #02. Percentage of revenue per movie by category: medium: 6% 4. Join over 23 million developers in solving code challenges on HackerRank, one of the SQL interview questions have been a critical component of technical hiring for decades. python3 hackerrank-python hackerrank-solutions If you want to get the products that does not exists in orderline table you can simply use LEFT join with WHERE orderline. Instructions. 20 for 20%, 50 for 50) with no decimals. We 🎥 Welcome to Day 6 of the SQL Interview Preparation Series! In this session, we’re exploring creativity and formatting in SQL. My Solutions to HackerRank Practice Questions on SQL, Python, and Algorithms. Which of the following is true about SDL? It is used to define internal Schema. Column1: Product Column2: Units sold Column3: Growth from previous month (in %) Column4: Growth from same month last year (in %) In my table the Hello coders, in this post you will get all the solution of HackerRank SQL Solutions. Please read our cookie policy for more information about how we use cookies. amount – The amount of that product sold on a you can get more of the same in our Annotated solutions to HackerRank's SQL domain questions. HackerRank Percentages Questions and Answers. Advanced Select Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Email. 20%. 99%. 00), (70000,1000000, 33. Use `L; AG()` and a conditional filter. e. Print Prime Numbers. Retrieve each product bought by a Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. It stands for Structured Query Language and was developed by IBM in the 1970s, SQL allows us to create, read, update, and delete data with simple yet effective commands. So the report should look something like this: Category | Month | Rev. Please read our cookie policy for more Intermediate. Covered in subquery practice exercises 10 Here are some question which is asked in recent swiggy for data/business analyst role. First table name is Sales_Table. Today’s problems focus on cu As per the question title I would like to understand which SQL would be efficient and why based on the below solutions assuming the data volumes are high in both the tables PRODUCTS( millions of rows ) AND SALES( billions of rows ). code = WP. code WHERE WP. Writing a SQL select statement to calculate commission paid to sales employees fro the month of December. Given the customer_purchases and product_list tables Monthly Percentage Difference. Easy SQL (Advanced) Max Score: 25 Success Rate: 97. Internship & Job Tips. Click here to see more codes for NodeMCU ESP8266 and similar Family. Packages. 02%. select the top 3 departments with at least ten employees and rank them A correlated subquery may be the simplest to read and understand: declare @t table (MinLimitExclusive int, MaxLimitInclusive int, TaxRate decimal(5,2)) insert into @t(MinLimitExclusive,MaxLimitInclusive,TaxRate) values (0 ,14000 , 10. It seems like SQL questions are either super Q ue 1. sql │ ├── Sales Analysis 2. In this video, you will be solving a SQL Interview question that has been asked in HackerRank assessment of Meesho. total_price) / (SELECT SUM(total_price) FROM Sales)) * 100 AS revenue_percentage FROM Sales s JOIN Products p ON s. Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. The attempt with the highest score is only one considered. Given a table named . You signed out in another tab or window. Sales Data for all customers and products. There are many repos on the internet for the solutions of these questions. Show Graph. – This repository contains solutions to all the HackerRank SQL Practice Questions - Pavith19/HackerRank-SQL-Challenges-Solutions Here is another way of doing so where MAX is treated as analytical function (Available since SQL Server 2005) I'm not sure that this answers the question (sql fiddle using base from John Woo's answer). Status. 88%. Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare This is a new question Hackerrank has added for the advance level SQL certification. 50), (14000,48000 , 17. Comments. and Prices per Sale ID from the Sales Table Using SQL. The report must be in descending order by grade — i. MIN_MARK and G. MARKS; Medium SQL (Intermediate) Max Score: 30 Success Rate: 97. Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. The table represents the investment in different stocks as transactions. Practice. Follow-up Airpod Hard SQL (Intermediate) Max Score: 50 Success Rate: 85. Medium SQL (Intermediate) Max Score: 30 Success Rate: 96. 49%. Share this post. Data Analyst SQL Questions asked in Swiggy Interview Here are some question which are asked in recent swiggy for data/business analyst role. dataelephant dataelephant. catid = 1 then o. Which leads me to believe it is the opposite. however, due to data types if using 100 you can still get the result rounded to 0 decimals you desire for the % where as if you put it after the division operation you would have to make sure that you cast to a data type that For the date 2023–01–01, the day difference is 1 day. notes, I've given the tables an alias to ensure you don't get conflicts between the column names. It would make more sense if the question was: "return all countries that have more customers than the average number of customers of all countries". Contains solved queries for the Hackerrank SQL (Basic) Skills Certification Test 🎓. Try Teams for free Explore Teams. You switched accounts on another tab or window. Join over 23 million developers in solving code challenges on HackerRank, one Given a sales table with sales amount stored in local currencies and an exchange rate table containing currency conversion rate, to get total sales amount in USD for each sales date I need query Skip to main content. 90411 Joe. Your given an . The authors dataset has 1M+ rows; Create an SQL query that shows the TOP Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. Continent) and their respective average city populations In this article, we’ll provide a brief overview of the HackerRank Advanced SQL Certification, including what it covers, who it’s for, and how to get certified. Easy Problem Solving ServiceNow asked these 10 SQL interview questions in recent Data Analyst, Data Science, and Data Engineering job interviews! Can you solve them?? SQL is used internally by Data Analysts and Data Scientists who The last table in the dataset is sales_history. Each question covers a different aspect of SQL, providing a comprehensive learning experience. As a data analyst at IBM, you have been asked to analyze sales data from the IBM e-commerce platform. The solutions of all the Hackerrank SQL challenges for all easy, medium and hard challenges executed on Oracle environment. 75%. We Now that I got these values, I can find a percentage of the valid sales. I want to create simple currency converter. Sample table: customer . Hard SQL (Advanced) Max Score: 50 Success Rate: 78. Round your answer to a percentage (i. So, to help you prepare, SQL Question 8: Average Sales of IBM Products. catid = 2 then o. All my solutions are written in MySQL. I am writing answers of these question using SQL Find the difference between the total number of CITY entries in the table and the number of distinct CITY entries in the table. sql Medium SQL (Intermediate) Max Score: 30 Success Rate: 97. SQL - HackerRank Questions and answers. Home. id = s. Inserting a Node Into a Sorted Doubly Linked List. From here, think about how you would associate employees with their department, calculate and display the Saved searches Use saved searches to filter your results more quickly Easy SQL (Intermediate) Max Score: 30 Success Rate: 94. Here are the schema details as below. SELECT p. Solve Challenge. Difficulty Level: Easy Question: Query the average population of all cities in CITY where District is California. You can toss a subquery in your WHERE clause to find customers that have had sales today: SELECT count(*) /*count of transactions*/ FROM transactions WHERE /*Transactions in the last two months*/ transaction_date > DATEADD(mm, -2, GETDATE()) /*For customers that have had a sale today*/ customer_number in (SELECT customer_number HackerRank. We The subquery selects the sales_date (s. It is used to This repository contains the solutions for HackerRank Beginner and Intermediate SQL Certifications. Return distributor ID , If there is a tie, report them all. . The CITY table is @AlvinH . sql │ ├── Reformat department table. Show total sales for each month, with the amount sold in the previous month. On this day, two users, A and B, both have a submission count of 1, so they are considered continuous submitters from the first day; Welcome to HackerRank SQL No. By detailing sales figures per city and identifying customers who spent 25% or less than the average, this solution aids in strategic decision-making for optimizing sales and customer This intermediate SQL solution provides insights into product sales across cities, offering a comprehensive overview of customer spending patterns. These questions are more suited to SQL practitioners with a few years of experience. Please make sure you are not interrupted during the test, as the timer cannot be paused once started. Revising the Select Query I – HackerRank Solution; Revising the Select Query II – HackerRank Solution; Looking for 100 SQL interview questions seen in FAANG, startups? Here's a guide for data analysts, data scientists, and data engineers! Calculate the 7-day moving average of daily sales. product_family: total: valid_solds_percentage: CONSUMABLE: 103: 100: GADGET: 86: 76. S Easy SQL (Advanced) Max Score: 25 Success Rate: 96. This was my previously submitted (accepted) solution in MS SQL Server, but this much should be the same for MySQL. HackerRank. The STATION table is described as follows:. Grade >7 THEN S. @Digitalsa1nt (100 * 2) / 4 = 50, (2/4) * 100 = 50 as long as the enumerator is is the part being multiplied. SQL (Basic) SQL (Intermediate) SQL (Advanced) Difficulty. sql; oracle-database; or ask your own question. Subquery in SELECT clause: Include a subquery in the SELECT clause to retrieve a single value or set of values that can be used in the main query. (SUM(s. Copy link. sql │ ├── Replace employee id with unique identifier. That's why IBM uses HackerRank for SQL query questions in interviews for Data Science, Solutions Architect, and & Data Engineering jobs. Get Prime Course List. Given a table of purchases by date, calculate the month-over-month percentage change in Prepare for your interview with our curated list of Facebook SQL interview questions. Boost your database management skills, improve your data manipulation techniques, and become proficient in SQL queries. Contribute to devika-be/HackerRank-SQL development by creating an account on GitHub. coins_needed) FROM Wands W2 INNER JOIN Sample Output. In this section, we take a look at the 40 most popular intermediate SQL questions and answers, so that you'll know what to expect from your interviewer. Today’s interview question comes from stratascratch. com) Let’s say you have two SQL tables: authors and books . 06%. TotalAmount else 0 end) AS [Dispenser Sales], SUM(case when c. Problem 1. salesperson_id WHERE monthly_sales > (SELECT AVG(monthly_sales) FROM sales Solutions to all the HackerRank SQL questions to help you reach the gold badge. cnrfmtiqparxoomdhiitrujabsyqrianwopiqjcxxwoqactnbnqkrtth