SQL Table with the columns: UserID, TransactionID, DepartmentID, TransactionDate, UserName, DepartmentName 1. Do not remember the question. 2. For each department , show the users who make at least 3 transactions 3. For each department, select the user with the most Transaction (the result should contain the following fields: DepartmentName, UserName, number of interactions) 4. Difference between RowNumber and Rank Business question: Conversion ratio: x / (y + z) x = sales y = searches z = Searches in Alexa Given: The conversion rate increased, and the number of searches in Alexa (z) decreased. Question: Should I remove the Alexa search function? Answer: Not necessarily - need to check if y dropped more than z