The Trips table holds all taxi trips. Each trip has a unique Id, while Client_Id and Driver_Id are both foreign keys to the Users_Id at the Users table. Status is an ENUM type of (‘completed’, ‘cancelled_by_
[LeetCode] Trips and Users 旅行和用户 TheTripstable holds all taxi trips. Each trip has a unique Id, while Client_Id and Driver_Id are both foreign keys to the Users_Id at theUserstable. Status is an ENUM type of (‘completed’, ‘cancelled_by_driver’, ‘cancelled_by_client’). +...
【leetcode】Trips and Users TheTripstable holds all taxi trips. Each trip has a unique Id, while Client_Id and Driver_Id are both foreign keys to the Users_Id at theUserstable. Status is an ENUM type of (‘completed’, ‘cancelled_by_driver’, ‘cancelled_by_client’). +---+---+...
users_id 是这张表的主键(具有唯一值的列)。 这张表中存所有用户,每个用户都有一个唯一的 users_id ,role 是一个表示用户身份的枚举类型,枚举成员为 (‘client’, ‘driver’, ‘partner’) 。 banned 是一个表示用户是否被禁止的枚举类型,枚举成员为 (‘Yes’, ‘No’) 。 取消率的计算方式如下:(被司...
users_id:用户编号。 banned:用户是否被禁止,取值可能为'Yes'或'No'。 role1:用户角色,可能的取值为'client'(乘客)、'driver'(司机)和'partner'。 Create table If Not Exists Trips (id int, client_id int, driver_id int, city_id int, status1 ENUM('completed', 'cancelled_by_driver', 'cancelle...
client_id = uc.users_id and uc.banned = 'no' inner join users as ud on trips.driver_id = ud.users_id and ud.banned = 'no' group by request_at;这个需求厘清之后还是很简单的,所以代码写的也不是很复杂。运行结果:建表语句: create table `trips` ( `id` int default null, `client_id...
FROM Trips AS T WHERE T.Client_Id NOT IN( SELECT Users_Id FROM Users WHERE Banned='Yes') AND T.Driver_Id NOT IN( SELECT Users_Id FROM Users WHERE Banned='Yes' ) AND T.Request_at BETWEEN '2013-10-01' AND '2013-10-03'
if(client_id=users_id或driver_id=users_id)且users_id没有被禁止{此条记录没被禁止。} SQL 代码 SELECT*FROMTripsASTJOINUsersASUON(T.client_id=U.users_idORT.driver_id=U.users_id)ANDU.banned='No' 乍一看,思路是对。其实是错误的。因为,我们不知觉得肯定了一个假设—— client_id 与 driver_id...
Trips and Users The Trips table holds all taxi trips. Each trip has a unique Id, while Client_Id and Driver_Id are both foreign keys to the Users_Id at the Users table. Status is an ENUM type of (‘completed’, ‘cancelled_by_driver’, ‘cancelled_by_client’). ...
from Trips t inner join Users u on u.Users_Id =t.Client_Id and u.Banned = 'No' where t.Request_at between '2013-10-01'and'2013-10-03' group by t.Request_at; 好了,今天的文章就到这里。上期推文:LeetCode1-260题汇总,希望对你有点帮助!LeetCode刷题实战261:以图判树...