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Practice SQL Scripts From Interview Prep Websites

These are scripts that answer questions from leetcode, DataLemur, hackerank and sqlzoo. Links to questions and my answers are below!

LeetCode

QuestionAnswer
Employees earn more than their managersSolution
Second highest salariesSolution
Customers who never orderSolution
Duplicate EmailsSolution
Rising TemperaturesSolution
Department Top Three SalariesSolution
N-th Highest SalarySolution
Department Highest SalarySolution
Monthly Transactions ISolution
Managers with at Least 5 Direct ReportsSolution
Rank ScoresSolution
Not Boring MoviesSolution
Exchange SeatsSolution
Consecutive NumbersSolution
Human Traffice Of StadiumSolution
Trips and UsersSolution
Capital Gains/LossSolution
Market Analysis ISolution
Tree NodeSolution
Restaurant GrowthSolution
Game Play Analysis ISolution
Game Play Analysis IVSolution
Investments In 2016Solution
Friend Requests II: Who Has the Most FriendsSolution
Odd And Even TransactionsSolution
Confirmation RateSolution

DataLemur

QuestionAnswer
Laptop vs. Mobile ViewershipSolution
Average Review RatingsSolution
Matching SkillsSolution
Odd and Even MeasurementsSolution
Y-on-Y Growth RateSolution
Page With No LikesSolution
Frequently Purchased PairsSolution
Supercloud CustomerSolution
Sending vs. Opening SnapSolution
User's Third TransactionSolution
Repeated PaymentsSolution
Compressed ModeSolution
Signup Activation RateSolution
Highest-Grossing ItemsSolution
Top 5 ArtistsSolution
International Call PercentageSolution
Tweets' Rolling AverageSolution
Top Three SalariesSolution
Histogram of Users and PurchasesSolution

Hacker Rank

QuestionAnswer
Japanese CitiesSolution
Earnings of employeesSolution
Weather Observation Station 8Soluton
Weather Observation Station 9Soluton
More Than 75 MarksSolution
The PadsSolution
Binary Search Tree 1Solution

SQLZoo

QuestionAnswer
Richer Than UKSolution
Bigger Than Every Country In EuropeSolution
Neighbours of Argentina and AustraliaSolution
Teams that have coach Fernando SantosSolution
Busy years for John TravoltaSolution

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Solutions to Problems For SQL on Leetcode, Hackerrank & DataLemur

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datalemurdatalemur-solutionshackerrankhackerrank-solutionshackerrank-sqlleetcodeleetcode-practiceleetcode-questionsleetcode-solutionssqlsql-practicesql-querysqlzoosqlzoo-solutions

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