The Hackerrank SQL Certificate Test Solution offers verified and optimized solutions to the HackerRank SQL Certification Test. It covers Basic, Intermediate, and Advanced levels, making it ideal for ...

Query the two cities in STATION with the shortest and longest CITY names, as well as their respective lengths (i.e.: number of characters in the name). If there is more than one smallest or largest ...

Learning SQL is a great move for anyone working with data, but actually getting good at it can feel tricky, especially if you don’t have a database handy. Luckily, there are tons of free places online ...

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