10 Days of SQL

Polish your SQL skills..!!

This repo have problems of SQL from Leetcode.

Problems

Problem No.	Difficulty	Title
595	`Easy`	Big Countries
1757	`Easy`	Recyclable and Low Fat Products
584	`Easy`	Find Customer Referee
183	`Easy`	Customers Who Never Order

Problem No.	Difficulty	Title
1667	`Easy`	Fix Names in a Table
1484	`Easy`	Group Sold Products By The Date
1527	`Easy`	Patients With a Condition

Problem No.	Difficulty	Title
1965	`Easy`	Employees With Missing Information
1795	`Easy`	Rearrange Products Table
608	`Medium`	Tree Node
176	`Medium`	Second Highest Salary

Problem No.	Difficulty	Title
175	`Easy`	Combine Two Tables
1581	`Easy`	Customer Who Visited but Did Not Make Any Transactions
1148	`Easy`	Article Views I

Problem No.	Difficulty	Title
197	`Easy`	Rising Temperature
607	`Easy`	Sales Person

Problem No.	Difficulty	Title
1141	`Easy`	User Activity for the Past 30 Days I
1693	`Easy`	Daily Leads and Partners
1729	`Easy`	Find Followers Count

Problem No.	Difficulty	Title
586	`Easy`	Customer Placing the Largest Number of Orders
511	`Easy`	Game Play Analysis I
1890	`Easy`	The Latest Login in 2020
1741	`Easy`	Find Total Time Spent by Each Employee

Problem No.	Difficulty	Title
182	`Easy`	Duplicate Emails
1050	`Easy`	Actors and Directors Who Cooperated At Least Three Times
1587	`Easy`	Bank Account Summary II
1084	`Easy`	Sales Analysis III

-> Read the question carefully.

-> Read the tutorial if you are not familiar with the topic.

-> Go to Leetcode’s discussion board to get some hints or solutions.

-> Try to understand the solutions.

-> Practice with the same question again.