Leetcode sql percentage

Leetcode sql percentage. 🚀 Day 9 LeetCode SQL Challenge: Primary Department for Each Employee (Question #1789) Level up your coding skills and quickly land a job. Explanation: The percentage of characters in s that equal the letter 'o' is 2 / 6 * 100% = 33% when rounded down, so we return 33. Contribute to ieshreya/sql-50-leetcode development by creating an account on GitHub. Example 1: Dec 17, 2020 · Write an SQL query to find the percentage of the users registered in each contest rounded to two decimals. Write an SQL query that reports the average experience years of all the employees for each project, rounded to 2 digits. 33. 50 high-frequency SQL questions. T Oct 10, 2021 · Write an SQL query to report the IDs of the low-quality problems. Note that 100. Jul 1, 2023 · 33. Department Top Three Salaries - Level up your coding skills and quickly land a job. -- Both quality and poor_query_percentage should be rounded to 2 decimal places. This table contains the company id, the id, the name and the salary for an employee. I'm using MySQL but this solution should work in any SQL dialect Percentage of Users Attended a Contest - Level up your coding skills and quickly land a job. View vishakha1812's solution of Percentage of Users Attended a Contest on LeetCode, the world's largest programming community. Aug 1, 2023 · Write an SQL query to find the percentage of the users registered in each contest rounded to two decimals. It is guaranteed that a customer has precisely one first order. The query result format is in the following example. SQL. Each row of this table indicates the ID of an order and the ID of the customer who ordered it. - Leetcode-database-question-MySQL/Easy/1211 Queries Quality and Percentage. . Type 3: Select the group that didn’t do X. . I'm using MySQL but this solution should work in any SQL dialect such as PostgreSQL We define query quality as: The average of the ratio between query rating and its position. Example 1: Jan 27, 2022 · Previous Video: LeetCode 1113 Reported Postshttps://www. Solution: Hi friends, in this article we’ll go through the 50 SQL interview questions on LeetCode in a step-by-step process. The SQL 50 collection on LeetCode consists of a diverse range of SQL problems designed to assess and enhance your SQL skills. Percentage of Users Attended a Contest - LeetCode Mar 5, 2021 · Solution and walkthrough of leetcode database problem 1454: Active Users. Can you solve this real interview question? Department Highest Salary - Table: Employee +--------------+---------+ | Column Name | Type Queries Quality and Percentage - Level up your coding skills and quickly land a job. Best for 1 month of prep time. Nov 10, 2023 · Queries Quality and Percentage (Question #1211) 3 min read · Nov 9, 2023--1. Simulation 147. Level up your coding skills and quickly land a job. Both Type-2 and Type-3 questions are testing our ability to precisely identify the special group that satisfies certain constraints. project_id | sale_id | product_id | year | quantity | price | | ----- | ----- | ---- | ----- | ----- | | 1 | 100 | 2008 | 10 | 5000 | | 2 | 100 | 2009 | 12 | 5000 | | 7 | 200 Calculate Special Bonus - Level up your coding skills and quickly land a job. Graph 142. Given a string s and a character letter, return the percentage of characters in s that equal letter rounded down to the nearest whole percent. --Write an SQL query to find the percentage of immediate orders in the first orders of all customers, rounded to 2 decimal places. Write an SQL query to find each query_name, the quality and poor_query_percentage. -- Write an SQL query to find each query_name, the quality and poor_query_percentage. Alice and Alex registered in contest 215 and the percentage is ((2/3) * 100) = 66. Nov 20, 2022 · Question: https://leetcode. These problems cover a wide array of SQL concepts, including basic queries, subqueries, joins, aggregations, window functions, and more. The result format is in the following example. In case of a tie Dec 25, 2020 · Write an SQL query to find the percentage of immediate orders in the first orders of all customers, rounded to 2 decimal places. Each row of this table contains information about one employee. MYSQL Query: select p. Counting 126. Design 123. A LeetCode problem is low-quality if the like percentage of the problem (number of likes divided by the total number of votes) is strictly less than 60%. We also define poor query percentage as: The percentage of all queries with rating less than 3. Return the result table ordered by user1 Nov 9, 2023 · The percentage of all queries with rating less than 3. * 100, 2) immediate_percentage FROM Delivery d WHERE d. | id | name |. The query result format is in the following example: The customer id 1 has a first order with delivery id 1 and it is scheduled. Bob registered in contest 207 and the percentage is ( (1/3) * 100) = 33. 0 / Denominator) AS FLOAT), 2) AS Percentage. vishakha1812. Nov 12, 2023 · Welcome to the detailed solution and walkthrough for the SQL challenge 'Queries Quality and Percentage' from LeetCode. Asvitha V S. We can use the sum function to count the number of instant orders, and then divide it by the total number of orders. The percentage is 100% and we sort them in the answer table by contest_id in ascending order. Finally, we can use the round function to keep two decimal places. Sep 12, 2023 · Write an SQL query that reports the average experience years of all the employees for each project, rounded to 2 digits. 14. ROUND(CAST((Numerator * 100. The popularity percentage is defined as the total number of friends the user has divided by the total number of users on the platform, then converted into a percentage by multiplying by 100, rounded to 2 decimal places. Write a solution to find all customers who never order anything. 67%. 11. We define query quality as: The average of the ratio between query rating and its position. Since the problem requires a percentage, we need to multiply by 100. Easy. Example 1: Solved SQL questions in the second round. ms sql. Write an SQL query to find the salaries of the employees after applying taxes. youtube. Mar 20, 2021 · Solution and walkthrough of leetcode database problem 1757: Recyclable and Low Fat Products. order_date = Therefore, the percentage popularity for user 8 would be calculated as (1/9) * 100 = 11. Dec 30, 2020 · 1633. Table: Employee +-----+-----+ | Column Name | Type | +-----+-----+ | id | int | | name | varchar | | salary | int | | managerId | int | +-----+-----+ id is the Table: Scores +-----+-----+ | Column Name | Type | +-----+-----+ | id | int | | score | decimal | +-----+-----+ id is the primary key (column with unique values) for Each row of this table contains the id of an employee and their respective bonus. - Leetcode-Problems/Others /# 1211. I simply use this when ever I need to work out a percentage. md at main · jjjllxx/Leetcode-database-question-MySQL Sep 14, 2023 · The key functionality of the SQL query you have provided is to group the rows in the queries table by the query_name column and calculate the average quality and poor query percentage for each Sep 4, 2023 · Write an SQL query to find the popularity percentage for each user on Meta/Facebook. 33%. Jun 23, 2020 · Type 2: Select the group that did X. LeetCode SQL 50 Problems — Step by Step Solution. Explanation: All the users registered in contests 208, 209, and 210. Table: Activity +-----+-----+ | Column Name | Type | +-----+-----+ | player_id | int | | device_id | int | | event_date | date | | games_played | int Basic to advanced SQL topics. In case of a tie, order it by contest_id in ascending order. Calculate Salaries. Nov We also define poor query percentage as: The percentage of all queries with rating less than 3. Percentage of Users Attended a Contest. Alice and Alex registered in contest 215 and the percentage is ( (2/3) * 100) = 66. In this case, you want to retrieve the product_id of products that meet the criteria Jun 30, 2023 · MLV PRASAD - Unlocking the Power of SQL for Interviews💫 Welcome to MLV PRASAD's YouTube channel! 🎥 I am dedicated to providing you with comprehensive educa View neildeng0705's solution of undefined on LeetCode, the world's largest programming community. Feb 5, 2023 · Write an SQL query to find the percentage of immediate orders in the table, rounded to 2 decimal places. Example 1: Output: Table: Customer +-----+-----+ | Column Name | Type | +-----+-----+ | customer_id | int | | product_key | int | +-----+-----+ This table may contain duplicates rows. Nov 7, 2022 · Welcome to the Leetcode SQL series#leetcodesolution #leetcode #sql Link to the problem:https://leetcode. Find and fix vulnerabilities Codespaces. 120. Return the result table ordered by percentage in descending order. Stack 152. Write a solution to find each query_name, the quality and poor_query_percentage. -- The percentage of all queries with rating less than 3. 0 returns 1 decimal, whereas 100 on it's own will round up the result to the nearest whole number, even with the ROUND (,2) function! edited Mar 2, 2021 at 1:23. The tax rate is calculated for each company based on the following criteria: 0% Median Employee Salary - Level up your coding skills and quickly land a job. Can you solve this real interview question? Consecutive Numbers - Table: Logs +-------------+---------+ | Column Name | Type | +-------------+---------+ | id | int Heap (Priority Queue) 168. Example 1: Input: Customers table: +----+-------+. Example 2: Table: Products +-----+-----+ | Column Name | Type | +-----+-----+ | product_id | int | | low_fats | enum | | recyclable | enum | +-----+-----+ product_id is the We also define poor query percentage as: The percentage of all queries with rating less than 3. -- The query result format is in the following example: -- Delivery table: Queries Quality and Percentage - Level up your coding skills and quickly land a job. As you will see, Type-1 questions are basically testing our ability to use different kinds of joins. Sliding Window 118. order by percentage desc,contest_id. - User "9" has friendships with 3. It's guaranteed that experience_years is not NULL. MLV PRASAD - Unlocking the Power of SQL for Interviews💫 Welcome to MLV PRASAD's YouTube channel! 🎥 I am dedicated to providing you with comprehensive educa Table: Employee +-----+-----+ | Column Name | Type | +-----+-----+ | id | int | | name | varchar | | department | varchar | | managerId | int | +-----+-----+ id is Mar 4, 2020 · select round (avg (f), 2) as immediate_percentage from (select case when order_date = customer_pref_delivery_date then 1 else 0 end as f from rank where rnk = 1) first_orders; Share Improve this answer Table: Activity +-----+-----+ | Column Name | Type | +-----+-----+ | user_id | int | | session_id | int | | activity_date | date | | activity_type | enum Sep 18, 2023 · Solution: SELECT product_id: This part of the query specifies the column you want to include in the result set. Table Salaries: (company_id, employee_id) is the primary key for this table. Example 1: Percentage of Users Attended a Contest - Level up your coding skills and quickly land a job. com/problems/percentage-of-users-attended-a-contest/In this video I solve and explain a leetcode SQL question using MySQL query. Feb 16, 2019 · sql # Write your MySQL query statement below SELECT ROUND ( AVG ( order_date = customer_pref_delivery_date ) * 100 , 2 ) AS immediate_percentage FROM Delivery WHERE ( customer_id , order_date ) IN ( SELECT customer_id , MIN ( order_date ) FROM Delivery GROUP BY 1 ); May 20, 2020 · All the users registered in contests 208, 209, and 210. Write a solution to report the name and bonus amount of each employee with a bonus less than 1000. Key Functionality. Backtracking 101. Queries Quality and Percentage - Level up your coding skills and quickly land a job. Sep 13, 2023 · round (count (distinct user_id) * 100 / (select count (user_id) from Users) ,2) as percentage. All the users registered in contests 208, 209, and 210. This is the best place to expand your knowledge and get prepared for your next interview. Example 2: Percentage of Users Attended a Contest - Level up your coding skills and quickly land a job. Percentage of Users Attended a Contest - Level up your coding skills and quickly land a job. com/watch?v=AaR9jYa3sj0In this video I solve and explain a leetcode SQL question using MySQL Queries Quality and Percentage - Level up your coding skills and quickly land a job. from Register. com/problems/queries-quality-and-percentage/👉 Link t Apr 13, 2022 · Question: https://leetcode. group by contest_id. Example 1: Output: 33. Instant dev environments Write an SQL query to find for each month and country, the number of transactions and their total amount, the number of approved transactions and their total amount. 1468. com/problems/friend-requests-ii-who-has-the-most-friends/description/SQL Schema:Create table If Not Exists RequestAccepted (reques The SQL 50 collection on LeetCode consists of a diverse range of SQL problems designed to assess and enhance your SQL skills. The customer id 2 has a first order with delivery id 2 and it is immediate. Example 1: Aug 26, 2022 · The percentage of all queries with rating less than 3. Accepted. Aim to organize Multiple solutions and thoughts for each question, compare and find the optimal ones. user1 is sorted in ascending order. Return the result table in any order. Prefix Sum 160. Table: Activity +-----+-----+ | Column Name | Type | +-----+-----+ | user_id | int | | session_id | int | | activity_date | date | | activity_type | enum Feb 15, 2019 · Solution 1: Sum. Hi friends, in this article we’ll Percentage of Users Attended a Contest - Level up your coding skills and quickly land a job. Write a solution to find the percentage of immediate orders in the first orders of all customers, rounded to 2 decimal places. Return the result table ordered by problem_id in ascending order. The code Popularity Percentage - Level up your coding skills and quickly land a job. Example 1: LeetCode Solutions in C++20, Java, Python, MySQL, and TypeScript. Percentage of Users Attended a Contest - LeetCode The first order of a customer is the order with the earliest order date that the customer made. Bob registered in contest 207 and the percentage is ((1/3) * 100) = 33. Therefore, the percentage popularity for user 9 would be calculated as (1/9) * 100 = 11. Concepts Covered:-- Aggregate Functions MySQL solutions to leetcode database question, divided by difficulty. Both quality and poor_query_percentage should be rounded to 2 decimal places. mt cv gb pl oo ie cb iu tu sm