Julia conducted a 15 days of learning SQL contest. The start date of the contest was *March 01, 2016* and the end date was *March 15, 2016*. Write a query to print total number of unique hackers who ...

My complete SQL Masterclass Notes in Tanglish is now live! Covers 30+ topics with syntax, examples, and step-by-step explanations. Perfect for both beginners and ...