← 返回 waymo 的题目列表Low Frequency Users by City
类型:online_judge
Problem: Low Frequency Users by City
Given:
users(user_id, city)
rides(ride_id, ride_date, ride_rating, user_id)
For each city, count distinct users whose total number of rides is 0 or 1.
Include registered users who have never taken a ride.
Return city and low_frequency_user_count.