太难了。我只做出来一小问。1.以下是UserActions表UserIDTypeActionTimeActionDetail0001click2023-11-10 01:00:00{"Class1":"Red","Promotions":"10%discount1,5%discount2"}0003pruchase2023-11-9 11:02:30{"Class1":"Black","Promotions":"10%discount1,5%di...