medium

[2292#_MEDIUM] Products With Three or More Orders in Two Consecutive Years

[2238#_MEDIUM] Number of Times a Driver Was a Passenger

[2228#_MEDIUM] Users With Two Purchases Within Seven Days

[2175#_MEDIUM] The Change in Global Rankings

[2159#_MEDIUM] Order Two Columns Independently

[2142#_MEDIUM] The Number of Passengers in Each Bus I

[2112#_MEDIUM] The Airport With the Most Traffic

[2084#_MEDIUM] Drop Type 1 Orders for Customers With Type 0 Orders -- 문제를 잘 읽자