Write a query that returns both “Revenue last 30 days” and its trend (the percentage difference between the previous 30 days). Submit the trend value as the answer.
Round the answer to the closest integer. For example, if the trend is -78.66% submit -79 as the answer.
About SQL Habit
Hi, it’s Anatoli, the author of SQL Habit. 
SQL Habit is a course (or, as some of the students say, “business simulator”). It’s based on a story of a fictional startup called Bindle. You’ll play a role of their Data Analyst 
and solve real-life challenges from Business, Marketing, and Product Management.
SQL Habit course is made of bite-sized lessons and exercises (you’re looking at one atm). They always have a real-life setting and detailed explanations. You can immediately apply everything you’ve learned at work. 
