Sales data for all customers and products sql hackerrank solution oracle server cusId IN (select cusId from orders group by cusId having count(*) = (select count(*) from orders or group by or. Sub-queries: Enhance your querying skills with nested queries. This repository contains all 58 solutions to the HackerRank SQL Practice Questions. For MySQL. Sort your results by the Your question is a lot like that. cusId order by count(*) desc limit 1)); This solution is for MySQL, as I have used LIMIT. id = i. To succeed, candidates should be well-versed in SQL fundamentals and prepared to solve complex scenarios with confidence. SELECT first_name from customers WHERE first_name not in (select first_name from customers join orders on customers. - GitHub - kg-0805/HackerRank-Solutions: This Repository contains all the Learn who they are and how HackerRank helped transform their tech hiring. - adminazhar/-hackerrank-SQL-intermediate-skills-certification-test-solution Skip to content Navigation Menu This Repository contains all the solutions of HackerRank various tracks. (3) Hopefully your book and class taught good practices, such as using explicit join syntax and spelling out "month" in datepart(). We My solutions to SQL problems on HackerRank # SQL Problems Page: https://www. select Oracle Products, Solutions, and Services. It helps the sales team to align their efforts effectively. We are not afraid to dive deep into our domain. Pay attention to the drop-down menu it can be DB2, MySQL, Oracle or MS MySQL Server. These questions often involve topics such as data manipulation, query optimization, and database design. - adminazhar/hackerrank-SQL-basic-skills-certification-test-solution Skip to content Navigation Menu That site doesn't seem to ever show your the output from your submission, unhelpfully, but does with just 'run code'. Get noticed by companies. The bigger and more complex data, the more beneficial SQL becomes. Don't use BETWEEN on dates. Manage code changes "City where each product has been sold" refers to the city of consumption, so you need to join transactions to consumers, sum the quantity by that city and the product. Oracle Sales. Oracle is the only technology provider with a complete suite of integrated cloud applications and a cloud infrastructure platform. Collaborate outside of code Code Search. 0 | Permalink. Time components can cause the code to do things you don't expect. Read now. sql and 2. Contains solved queries for the Hackerrank SQL (Intermediate) Skills Certification Test 🎓. Tab/Se Youlube Maps 2 List Customer and Product Without Sale Using the UNION operator in one list return all customers who do not have an invoice and all products that were not sold For each customer without an invoice return - the string customer - the customer id - the customername For each product without an invoice return - the string product - the product id - Product GitHub Copilot. 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 MySQL challenge solution in the MySQL Advance Track - GitHub - hammad-ali-shah/SQL: HackerRank MySQL challenge solution in the MySQL Advance Track I also know I need a ROLLUP function to tally the total on the row below, but I haven't come to that part of my solution yet. This collection serves as a useful resource for improving SQL skills and problem-solving techniques. To get only the customers with order, use an INNER JOIN. Blog; You signed in with another tab or window. 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 You signed in with another tab or window. ordNum FROM customers c -- In this post, I’ll share my solutions to some SQL problems on HackerRank, categorized as “Easy. Intermediate. CurrencyRate table and you will see the data generated by default. - LinconDash/Hackerrank-SQL-Solutions My journey of earning a SQL certification and tackling HackerRank SQL challenges. MySQL ; Problem. 5 hours long? Because Im solving ALL of the SQL Problems on Hackerrank in this video. The above logic works with or without time components. - Ishika63/HackerRank-SQL-Intermediate-Solution . Prove your Skills. maxPrice This solution has a runtime of 5853ms and it's faster than 5. ; Advanced: Expert-level problems and more complex queries. Also there is no need for BETWEEN because all you need is the order date to be before the minimum date + 10 years. end of SOHP-Fall-Rush-tiles slider. My current query gives me the product wise purchase amount for the customer. hackerrank solutions github | hackerrank all solutions | hackerrank solutions for c | hackerrank data structures | hackerrank solutions algorithms | hackerrank coding challenge | hackerrank algorithms solutions github | hackerrank algorithms solutions github You signed in with another tab or window. More than 100 million people use GitHub to discover, fork, and contribute to over 420 million projects. Jacky Ogingo · Follow. Here are the schema details as below. Ok | Prepare; Certify; Compete; Apply; Hiring developers? Log In; Sign Up; Prepare. Write a query to print the hacker_id, name, and the total number of challenges created by each student. Contribute to edaaydinea/HackerRank development by creating an account on GitHub. If you want to get the products that does not exists in orderline table you can simply use LEFT join with WHERE orderline. I don't want to group or count the invoices, I actually need to see all invoices. Several comments: (1) You are using SQL Server syntax, but the question is tagged MySQL. These concepts Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Considering your data model and requirements, you should try the below SQLs. This tutorial is only for Educational and Learning Purpose. You signed in with another tab or window. "Explore HackerRank SQL Solutions, a robust resource offering a diverse array of practical challenges and expert solutions to bolster your SQL proficiency and database querying skills. id AS product_id, invoice_item. Contribute to BlakeBrown/HackerRank-Solutions development by creating an account on GitHub. Solution for "Sales by Match" in Hackerrank. The rows will be populated with data from the view if any sales available, if not the row will have 0 values. sql hackerrank oracle-sql hackerrank-sql-solutions. Please read our cookie policy for more information about how we use cookies. As a data analyst at IBM, you have been asked to analyze sales data from the IBM e-commerce platform. Grow your skills through a quarter-long internship program for veterans and military spouses. Accelerate your Job Search. Go to the editor] . All Solutions are made in the MSSQL Syntax. . You’ll apply SQL skills like joins, subqueries, and CTEs to explore product, order, and customer data. Skill over pedigree. The solutions of all the Hackerrank SQL challenges for all easy, medium and hard challenges executed on Oracle environment. CHALLENGE_ID) TOT_CH FROM CHALLENGES c GROUP BY HACKER_ID), cteDups AS (SELECT TOT_CH, COUNT(TOT_CH) AS DUPS FROM cteCount Product GitHub Copilot. Your analysis . Zydee Auto Mart is one of our client companies that sent us a request to This repository contains my SQL solutions to HackerRank challenges, organized by difficulty: Easy, Medium, and Hard. The output column headers should be Doctor, Professor, Singer, and Actor, respectively. 10 Days of Javascript. Skills Directory. For each row return customer name, Depending on the employer’s technical interviewing tool, candidates can choose from a range of relational database tools, including DB2, MySQL, Oracle, and MS SQL Server. It is very important that you all first give it a try & brainstorm yourselves before having a While solving all SQL problems from HackerRank, I came across multiple solutions for the same problem. HACKER_ID, COUNT(c. CUSTOMER_ID, X. You signed out in another tab or window. I then join the two tables returned by the functions. " This repository contains my solutions to various SQL challenges on HackerRank, organized by categories and difficulty levels. product_name, a. View top submissions. The CITY is described as follows: Field Type; ID: NUMBER : NAME: VARCHAR2(17) Current projects at work require more SQL skills, so I took the time to brush up my SQL knowledge using the HackerRank coding challenges platform. A collection of solutions for HackerRank data structures and algorithm problems in Python, JAVA, and CPP. - mahedei/Hackerrank-SQL-Intemediate-Skills-Certification-Test-Solutions . id=orders. HackerRank. It showcases my growth, challenges faced, and solutions offered. Please check 1. This was curated after solving all 58 questions, and achieving a score of 1130 points (WR1) Subscribe Sign in. com practice problems using Python 3, С++ and Oracle SQL - marinskiy/HackerrankPractice. - adminazhar/hackerrank-SQL-basic-skills-certification-test-solution Skip to content Navigation Menu It’s again LEFT JOIN, as we add the nutrition_data table and join it with the product table. These solutions can This repository includes HackerRank Solutions. Search Ctrl + K. C# (Basic) JavaScript (Basic) SQL (Basic) Rest API You signed in with another tab or window. Certify. NAME, o. price = b. - qanhnn12/SQL-Hackerrank-Challenge-Solutions . last_name, SUM(hc. MySQL; Problem . Business Expansion: Write a query to find all pairs of customers and agents who have been in contact more than once. Write better code with AI This repository contains MySQL solutions of the HackerRank-SQL-Intermediate-Certificate problems which I encountered during the test. Adapt your hiring strategy Why this video is 7. Definitely, you can play with settings to adjust values to be generated, but the result will not look as precise as you may need. Being the captain means taking ownership of the project - this may involve bringing a Contains solved queries for the Hackerrank SQL (Basic) Skills Certification Test 🎓. Try this one if you want to get the whole row, (supports most RDBMS)SELECT a. 69% of tech leaders are preparing their teams for GenAI. Questions - Products Without Sales; Product Sales Per City Contains solved queries for the Hackerrank SQL (Basic) Skills Certification Test 🎓. This is the only video you will need to improve you Contains solved queries for the Hackerrank SQL (Intermediate) Skills Certification Test 🎓. Instant dev environments Issues. The Oracle Cloud offers all the services you need to migrate, build, and run your IT, from existing enterprise workloads to new cloud-native applications and data platforms This repository contains all the solutions to the SQL questions listed in the Hackerrank platform , can be used by coders for reference purpose. What I need is the total purchase amount. ^ These offers are provided at no cost to subscribers of Chegg Study and Chegg Study Pack. HackerRank . 7 Advanced SQL Interview Questions. Please visit each partner activation page for complete details. In certain situations, financial data can be very complicated; producing a I did this in SQL Server using CTE and dense_rank function. The OCCUPATIONS You signed in with another tab or window. Customer Placing the Largest Number of Orders. Topics Welcome to a comprehensive collection of my HackerRank solutions in C. Automate any workflow Codespaces. Manage code changes I believe the following query should work to identify the customer name with the highest amount derived from all orders in the current calendar year:. Note, the Note that . 100M+ solutions available instantly. 1. Write a query that gives month, monthly maximum, monthly minimum, monthly average temperatures for the six months. Return 3 Values: - Category - Is This The repository is organized as follows: Easy: Beginner-level SQL challenges. The ALL operator returns true if the condition is fulfilled by all rows returned by the subquery. QNTY FROM CUSTOMER_T CUST, ( SELECT X. 1 month ago + 0 comments. If you are using a different SQL Language (for example MySQL) you might have to adapt the solution a little. CodeChef CodeSignal CSES HackerEarth HackerRank LeetCode StrataScratch Home. [An editor is available at the bottom of the page to write and execute the scripts. customer_id where i. By detailing sales figures per city and This intermediate SQL solution provides insights into product sales across cities, offering a comprehensive overview of customer spending patterns. Hello coders, today we are going to solve Challenges HackerRank Solution in SQL. Then assign ranks (dRank column) within each partition. All features Documentation GitHub Skills Solutions. Since I know all tables will have twelve roves it's allot easier, and I can join on Product Category and Month: Contains solved queries for the Hackerrank SQL (Basic) Skills Certification Test 🎓. Find more, search less Explore. 7 min read · Jun 21, 2022--6. Problem; Input Format; Solution – Average Population in SQL. View on GitHub Hackerrank. GitHub Gist: instantly share code, notes, and snippets. SELECT * FROM city;-1 | Permalink. Contains solved queries for the Hackerrank SQL (Basic) Skills Certification Test 🎓. This community-owned project aims to bring together the solutions for the DS & Algo problems across various platforms, along with the resources for learning them. S. - Cyberoctane29 You signed in with another tab or window. cusId and o. Problem; Input Format; Explanation; Solution – Challenges in SQL. select 'customer' as category, c. You can get the max price by sorting the result of the query descending and keeping only the 1st row: 170+ solutions to Hackerrank. Take the HackerRank Skills Test. SELECT c. Navigation Menu Toggle navigation. Oracle Veteran Internship Program. sql files for the solutions I submitted! Question 1: Business Expansion. You’ll use SQL to analyze a sales database and answer key questions to guide business strategy. orders ( order_id INT IDENTITY (1, 1) PRIMARY KEY, customer_id INT, order_status tinyint NOT NULL, -- Order status: 1 = Pending; 2 = Processing; 3 = Rejected; 4 = Completed order_date DATE NOT NULL, required_date DATE NOT NULL, shipped_date DATE, store_id INT NOT NULL, staff_id INT NOT NULL, FOREIGN KEY (customer_id) SQL (Structured Query Language) is a powerful tool used for managing and manipulating relational databases. Each solution is accompanied by comments for clarity, showcasing various approaches and optimizations. And I've have technical interviews where they want me to solve certain tests/scenarios to test out my SQL skills. isn't supported by all DBMS systems, like in MySQL and Oracle (but have no fear, since you can use the operator to achieve a similar result). Take the HackerRank Certification Test and showcase your knowledge as a HackerRank verified developer. Each solution includes a brief explanation of the problem and my approach to solving it. I tried to provide those with explanation. It is guaranteed Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company List all customers who spent 25% or less than the average amount spent on all invoices. But I'm an IT guy who has been doing SQL since VERY EARLY ON, so I've got like 30 years of SQL experience in industry settings. Certificate can be viewed Here Verify your SQL Skills. Add a description, image, and links to the hackerrank-sql-solutions-oracle topic page so that developers can more easily learn about it. Explanation: In the given scenario, the goal is to determine the product with maximum discount for each category. Home; 👨🏻‍💻 Profile; Prepare. Find and fix Inside you will find the solutions to all HackerRank SQL Questions. Problems from Leetcode will be included soon in the project. Curate this topic Add this topic to your repo Solutions for all SQL challenges on HackerRank executed on MySQL and MS SQL Server. Or if you want them sorted by the number of visitors, use a different ORDER BY clause: SELECT Country, COUNT(*) AS 'Number' FROM YourTable GROUP BY You can toss a subquery in your WHERE clause to find customers that have had sales today:. (4) Your group by is missing a bunch of columns from the select. QNTY, MAX(X. Data Two tables: Customers and Orders. Prior to data processing, we need to identify the relationship of all The subquery selects the sales_date (s. Over 3,000+ companies across multiple industries trust HackerRank. I have taken HackerRank test on 22 July 2022. You’ll gain hands-on training in a variety of business areas, such as technology, data, logistics, HR and sales, alongside a dedicated onboarding guide and military community. productid FROM product p LEFT JOIN orderline o ON 39. The query shouldreturn all customers, even customers without invoices and also all products, even thoseproducts that were not sold. Leetcode SQL. In this project, you’ll take on the role of a data analyst at a scale model car company looking to make data-driven decisions. By detailing sales figures per city and identifyi This query joins the Sales and Products tables on the product_id column, groups the results by product name, calculates the total sales revenue for each product, and ranks products based on total sales revenue using the Hello coders, in this post you will get all the solution of HackerRank SQL Solutions. Business Expansion. All features Documentation GitHub Skills Blog Solutions By Question: Sales Data for All Customers and ProductsWrite a query that will return sales details of all customers and products. - qanhnn12/SQL-Hackerrank-Challenge-Solutions. Then order all the names alphabetically within each partition. ID, c. 4% of all SQL online submissions for this problem. Order the result by the amount spent from high to low. ORDER_DATE) without deriving it from a query. You can find me on hackerrank here. SELECT a. You can easily perform UNION with both the SQLs. Solutions of more than 380 problems of Hackerrank across several domains. Query the average population for all cities in CITY, rounded down to the nearest integer. – Gordon Linoff. (2) You can use SQL Fiddle as an online database to try things out. In this case, that beast is the data structure you're having to do this for plus the fact that shifts appear to cross days. The HackerRank Skills Certification Test is a standardized assessment to help developers prove their coding skills. A company wants to contact each of its customers regarding the policy changes. These About. Updated Oct 16, 2021; Load more Improve this page Add a description, image, and links to the A monthly sales report represents the state of sales activities in a company per month. Explore my GitHub repository to learn from my experiences and find inspiration for your SQL learning path. How the ranking works? First partition (form groups) over the lengths, i. No cash value. Note: Print NULL when there are no more names corresponding to an occupation. Reload to refresh your session. 9–Oct 3, 2024 among a random sample of U. sql hackerrank hackerrank-solutions sql-history hackerrank-30dayschallange hackerrank-sql hackerrank-statistics hackerrank-sql-solutions hackerrank-solutions-github sql-hackerrank hackerrank-sql-challenge hackerrank-solution hackerrank-sql-solutions-oracle hackerrank-sql-certificate hackerrank-sql-solution hackerrank-sql-problems hackerrank-sql -- MS SQL Server. CREATE TABLE sales. Question Find customers who have never made an order. Orders. - adminazhar/hackerrank-SQL-basic-skills-certification-test-solution Skip to content Navigation Menu Welcome to CarrY4U We trained Chegg’s AI tools using our own step by step homework solutions–you’re not just getting an answer, you’re learning how to solve the problem. I am not interested in getting the solution for the question but I would like to get better learning on the You signed in with another tab or window. Listen. ^ Chegg survey fielded between Sept. Long story below that. But you need to add a terminating / after your code, on a line on its own - Hello coders, today we are going to solve Top Competitors HackerRank Solution in SQL. From the following tables write a SQL query to find the salesperson and customer who reside in the same city. Whether we are a sales leader or manager, metrics play a crucial role in ensuring our company’s success. Learn who they are and how HackerRank helped transform their tech hiring. Automated the process of adding solutions using Hackerrank Solution Crawler. x), the exchange rate (e. We use cookies to ensure you have the best browsing experience on our website. Ok. Solutions to HackerRank practice, tutorials and interview preparation problems with Python, SQL, C# and JavaScript - nathan-abela/HackerRank-Solutions Customer Stories Partners Executive Insights Open Source GitHub Sponsors hackerrank solutions github | hackerrank all solutions | hackerrank solutions for java | hackerrank video tutorial | hackerrank cracking the coding interview solutions | hackerrank data structures | hackerrank solutions algorithms | hackerrank challenge | hackerrank coding challenge | You signed in with another tab or window. Skip to content. Updated Mar 8, 2020; learning udacity sql database hackerrank beginner-friendly udacity-nanodegree practice-project hackerrank-sql hackerrank-sql-solutions udacity-data-science-nanodegree practice-sql. In this post, we will be covering all the solutions to SQL on the HackerRank platform. Below are seven examples of the kinds of problems a data scientist or software engineer might face during a technical interview. Python. Need Help? View editorial. The LEFT JOIN keyword returns all records from the left table (Sales), and the matched records from the right table (Product). Table of Contents. The output would look something like this: Based on that the function will populate a table containing 12 rows. Solutions for all SQL challenges on HackerRank executed on MySQL and MS SQL Server. With the help of dbForge Data Generator for SQL Server, we can easily generate test values for that table. Write better code with AI Security. Solutions Basic Select Challenges Product Sales Data Analysis Using SQL and Power BI. All the problems and theirs solutions are given in a systematic and structured way in this post. Share this post . Short story here's you iceberg solution in SQL. Oracle supports the DATE keyword for introducing date constants using ISO-standard, unambiguous, non-locale-specific formats. - adminazhar/-hackerrank-SQL-intermediate-skills-certification-test-solution Skip to content Navigation Menu The questions asked are Invoices Per Country and Product Sales Per City in HackerRank SQL Intermediate Certification Exam and solution is Azhar Khan . CUSTOMER_ID, Final answer: The given problem requesting the product with the maximum discount in each category can be solved using SQL's GROUP BY, MIN() and MAX() functions to select the smallest product_id and the largest discount within each group respectively. Whether we are beginners or experienced professionals, practicing SQL exercises is important for improving your skills. Hacker rank SQL intermediate solution. 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. Contribute to karunakaran186/Sql-intermediate-hackerrank-solutions development by creating an account on GitHub. Linux Shell. Plan and track work Code Review. They have international customers, but their database does not include country codes In case the there are one or more customers having maximum orders: select * from orders o, customer c where o. Please checkout my solutions and make use of it for the learning purpose only. Source Code 2 In this solution, we use a LEFT JOIN to combine rows from Sales and Product where the product_id matches. Surprisingly it does seem to understand PL/SQL; and even more surprisingly it handles the set serveroutput on, which is a SQL\Plus/SQL Developer client command. This table contains sales data, including You may read our SQL Joins, SQL Left Join, SQL Right Join, tutorial before solving the following exercises. 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 . github mysql sql certificate hackerrank certification collaborate hackerrank-solutions hackerrank-sql hackerrank-sql-solutions gitlens hackerrank-certification student-vscode github-campus-experts hackerrank-certificatio Product GitHub Copilot. id AS invoice_item_id, This intermediate SQL solution provides insights into product sales across cities, offering a comprehensive overview of customer spending patterns. Instant dev cracking-the-coding-interview hackerrank hackerrank-python hackerrank-solutions hackerrank-java hackerrank-algorithms-solutions hackerrank-30dayschallange hackerrank-python-solutions hackerrank-sql hackerrank-problem-solutions hackerrank-sql-solutions hackerrank-practice hackerrank-problem-solving hackerrank-solutions-github hackerrank-all HackerRank Solutions provides solutions to all problems like Algorithms, Data Strucutres, C, C++, Python, Java, Interview Preparation Kit in Hackerrank . SELECT customer_ID, first_name, last_name, sum(hc_sales_total) as totalsales FROM ( SELECT c. Output the first name of the customer. Additionally, you should use explicit JOIN and not the old-style syntax:. It can be Problem. SELECT CUSTOMER_NAME, Y. Get Certificate. Then you'll have a table with all the costs. cost) AS hc_sales_total FROM Customers c INNER JOIN Whether it's product functionality or a customer or a candidate - we are the most knowledgeable person in our area of responsibility. We’re constantly expanding our extensive Q&A library so you’re covered with relevant, accurate study help, every step of the way. Share. SQL Question 8: Average Sales of IBM Products. I figured out that customer #50 is the #1 customer, so for now I was able to partition over the customer id and output all transactions and Total_Transactions_Amount. The solutions of all the SQL challenges for all easy, medium and hard challenges on HackerRank executed on MySQL environment compiled. customer_name, a. Complex Joins: Navigate through intricate relationships between tables. All Solutions in Hackerrank SQL Section. category AND a. You switched accounts on another tab or window. You signed out in another tab or You signed in with another tab or window. select * from CITY;-2 | Permalink. This is what I have so far. Mayukh Datta. 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 List Customer And Product Without Sale In One List Return, All Customers Who Do Not Have An Invoice And All Products That Were Not Sold. How should we handle multiple datasets that share relationships with one another? If you refer to the database provided by Kaggle, there are 7 to 8 separate datasets that represents an e-commerce sales report: order, customer, order_items, payment, delivery, etc. Products without sales: Write a query to find all the products that were not sold, ordering the results by SKU ascending. FROM sales_amount s: The sales_amount table is aliased as s. OrderDetails. Uncover more insights in the AI Skills Report. It looks innocuous, and yet just out of initial glance there is a hidden beast. Regular practice helps you get better at using SQL and boosts your confidence in handling different database tasks. Be the captain . ; Contains solved queries for the Hackerrank SQL (Basic) Skills Certification Test 🎓. QNTY) MAXAMT FROM ( SELECT ORD. Here is the In an Amazon SQL interview, candidates can expect a range of questions that test their SQL knowledge and problem-solving skills. Manage code changes This intermediate SQL solution provides insights into product sales across cities, offering a comprehensive overview of customer spending patterns. first_Name, c. 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 engagement. Manage code changes Discussions. Schema There are 2 tables: customer, invoice customer Name Type Description id int This Hello coders, today we are going to solve Average Population HackerRank Solution in SQL. id as id, customer_name as name from customer c left join invoice i on c. Question 2: Customer Spending . Code Compiler; Select Domain Data Dive deeper into SQL with complex joins, unions, and sub-queries. Julia just finished conducting a coding contest, and she needs your help assembling the leaderboard! Write a query to print the respective hacker_id and name of hackers who 1. Tutorials. SQL. category = b. Each solution is crafted to address a specific SQL problem from the HackerRank SQL challenge set, covering Invoice ===== InvoiceID CustomerID InvoiceDate TransactionDate InvoiceTotal Customer ===== CustomerID CustomerName What I want is a listing of all invoices where there is more than one per customer. ORG, c. You can use common table expressions to turn your repeated subqueries into inline views which you can query just as you would a normal view: WITH cteCount AS (SELECT c. * FROM tbProduct a INNER JOIN ( SELECT Category, MAX(Price) maxPrice FROM tbProduct GROUP BY Category ) b ON a. Problem; Input Format; Explanation; Solution – Top Competitors in SQL. Customer Spending. This is an interesting topic to explore, so here’s an article that explains multiple LEFT JOINs to help you with it. id is null Second SQL returns this list –> All HackerRank SQL Solutions. com practice problems using Python 3, С++ and Oracle SQL - marinskiy/HackerrankPractice . cusId = c. ” I used the MySQL option on the platform to Qualify all column names with the appropriate alias. - adminazhar/hackerrank-SQL-basic-skills-certification-test-solution Skip to content Navigation Menu This repository contains MySQL solutions of the HackerRank SQL Intermediate Certificate problems which I encountered during the test. For each customer, display their name and the amount spent to 6 decimal places. 2. Query the customer_number from the orders table for the customer who has placed the largest number of orders. Aha moments only. Julia asked her students to create some coding challenges. MySQL; Problem. ; Medium: Intermediate-level SQL challenges. 586. ↓ Skip to main content. Simply select the Sales. e same lengths make a group (partition). The tables I'm using are: Customers. Use The UNION Operator In This Query. So rank 1s in each group will be assigned to names That is the old-style JOIN syntax, wherein (+) denotes an OUTER JOIN. Load more conversations . All gists Back to GitHub Sign in Sign up Sign in Sign up You signed in with another tab or window. At HackerRank, we embody the spirit of a captain - empowered and fully accountable for the project. - adminazhar/-hackerrank-SQL-intermediate-skills-certification-test-solution . - adminazhar/hackerrank-SQL-basic-skills-certification-test-solution Skip to content Navigation Menu 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 ). These questions typically cover topics such as Oracle database architecture, SQL queries, data types, There is a table with daily weather data over the last 6 months of 2020, including the maximum, minimum, and average temperatures. Input Format. Solution – Select All in SQL SELECT * FROM CITY; Disclaimer: The above Problem is generated by Hacker Rank but the Solution is provided by CodingBroz. I'm trying to calculate the total purchase amount of each customer from the database available online on W3 Schools. 170+ solutions to Hackerrank. Here we want to ensure that we select only the lecturer(s) whose no_of_courses is less than all other lecturers (and only Country code | hackerrank Mysql certification solution . Find and fix vulnerabilities Actions. It took me a bit more than two weeks (on and off between work, workout, and taking the kid to day school, etc. If our data is stored in a database, SQL provides powerful tools to calculate and analyze monthly sales. cust_id) GitHub is where people build software. Write I have the following SQL statement that shows the total sales amount for customers in cities who have done at least 2 orders. Navigation Menu Toggle navigation . ; Hard: Advanced-level SQL challenges. Note: Round the average to the nearest integer. quantity FROM (SELECT customer. customer_ID, c. These machine learning-based CRM selling tools center around clean, complete customer data from internal and external sources that sellers can UNION your two queries together. Adi The PM's Substack. Pivot the Occupation column in OCCUPATIONS so that each Name is sorted alphabetically and displayed underneath its corresponding Occupation. Oracle Sales guides sellers with intelligent recommendations to help them focus on the most valuable prospects at the right time. Print "N/A" for a null customer or product name, and 0 for a nullquantity. exchange_rate) and calculates a row number for each row. Home; HackerRank Certification; Artificial Intelligence; About Me; Blog; Contact; Join Our Job & Internship Alerts Group! 🚀 Stay Updated with the Latest Opportunities in Tech! Azhar Khan . HackerRank is a platform for competitive coding. This means that every row in the left table will be returned whether it has a match on the right table or not. customers who used Chegg Study or Chegg Study Pack in Q2 2024 and Q3 2024. You just group your data by country and count the entries for each country. Home; ⭐ TOP INTERVIEW QUESTIONS Amazon Top Interview Questions Google Top Interview Questions Microsoft Top Interview Questions Facebook Top Interview Questions. Sign in Product GitHub Copilot. SELECT p. Articles Categories Travel Technical Problem Solving Opinion Events Tags Articles Categories Travel Technical Problem Solving Opinion Events Tags Mayukh Datta / Problem Solving Solutions / HackerRank SQL Solutions / HackerRank SQL 📗 Solutions of more than 380 problems of Hackerrank accross several domains. Solved queries for the Hackerrank SQL (Intermediate) Skills Certification Test 🎓. tymoshchuk_teti1. Products. In your code you use MIN(O2. Dataset Relationship Mapping. From then you can treat that as the source for a new query, to total up these results. Solution output: The Oracle basic interview questions focus on fundamental concepts and skills that every Oracle professional should know. Like Practice questions of C | C++ | JAVA | PYTHON | SQL and many more stuff. Unions: Combine results from multiple queries efficiently. To arrive at " the most " we need a ranking so dense_rank() can ordered by the sum of quantity (descending) and a rank of 1 would equate to "the most sold" (note: equal 1st position is allowed by using You probably know that SQL is a potent tool for analyzing all sorts of data. Join over 23 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. ) to finish all the 58 SQL challenges on the site, and I gained quite some insights from the journey (and having I haven't done HackerRank tests before, so cannot speak to those. Terms and Conditions apply. Explore careers for veterans Solution for "Sales by Match" in Hackerrank. Automate any workflow Contribute to omonimus1/HackerRank-Solutions development by creating an account on GitHub. First SQL returns this list –> All customers who do not have an invoice. id AS customer_id, product. Instant dev Contribute to chanwaihan/HackerRank-Solutions development by creating an account on GitHub. mpqo ymdnz jbnzkw uytk aqzyz rsojvjl xjm bgvolw xxxr ynkxfowgw