SQL178 工作日各时段叫车量、等待接单时间和调度时间
题目描述
用户打车记录表tb_get_car_record
id | uid | city | event_time | end_time | order_id |
---|---|---|---|---|---|
1 | 107 | 北京 | 2021-09-20 11:00:00 | 2021-09-20 11:00:30 | 9017 |
2 | 108 | 北京 | 2021-09-20 21:00:00 | 2021-09-20 21:00:40 | 9008 |
3 | 108 | 北京 | 2021-09-20 18:59:30 | 2021-09-20 19:01:00 | 9018 |
4 | 102 | 北京 | 2021-09-21 08:59:00 | 2021-09-21 09:01:00 | 9002 |
5 | 106 | 北京 | 2021-09-21 17:58:00 | 2021-09-21 18:01:00 | 9006 |
6 | 103 | 北京 | 2021-09-22 07:58:00 | 2021-09-22 08:01:00 | 9003 |
7 | 104 | 北京 | 2021-09-23 07:59:00 | 2021-09-23 08:01:00 | 9004 |
8 | 103 | 北京 | 2021-09-24 19:59:20 | 2021-09-24 20:01:00 | 9019 |
9 | 101 | 北京 | 2021-09-24 08:28:10 | 2021-09-24 08:30:00 | 9011 |
(uid 用户ID, city-城市, event_time-打车时间, end_time-打车结束时间, order_id-订单号)
打车订单表tb_get_car_order
id | order_id | uid | driver_id | order_time | start_time | finish_time | mileage | fare | grade |
---|---|---|---|---|---|---|---|---|---|
1 | 9017 | 107 | 213 | 2021-09-20 11:00:30 | 2021-09-20 11:02:10 | 2021-09-20 11:31:00 | 11 | 38 | 5 |
2 | 9008 | 108 | 204 | 2021-09-20 21:00:40 | 2021-09-20 21:03:00 | 2021-09-20 21:31:00 | 13.2 | 38 | 4 |
3 | 9018 | 108 | 214 | 2021-09-20 19:01:00 | 2021-09-20 19:04:50 | 2021-09-20 19:21:00 | 14 | 38 | 5 |
4 | 9002 | 102 | 202 | 2021-09-21 09:01:00 | 2021-09-21 09:06:00 | 2021-09-21 09:31:00 | 10 | 41.5 | 5 |
5 | 9006 | 106 | 203 | 2021-09-21 18:01:00 | 2021-09-21 18:09:00 | 2021-09-21 18:31:00 | 8 | 25.5 | 4 |
6 | 9007 | 107 | 203 | 2021-09-22 11:01:00 | 2021-09-22 11:07:00 | 2021-09-22 11:31:00 | 9.9 | 30 | 5 |
7 | 9003 | 103 | 202 | 2021-09-22 08:01:00 | 2021-10-22 08:15:00 | 2021-10-22 08:31:00 | 11 | 41.5 | 4 |
8 | 9004 | 104 | 202 | 2021-09-23 08:01:00 | 2021-09-23 08:13:00 | 2021-09-23 08:31:00 | 7.5 | 22 | 4 |
9 | 9005 | 105 | 202 | 2021-09-23 10:01:00 | 2021-09-23 10:13:00 | 2021-09-23 10:31:00 | 9 | 29 | 5 |
10 | 9019 | 103 | 202 | 2021-09-24 20:01:00 | 2021-09-24 20:11:00 | 2021-09-24 20:51:00 | 10 | 39 | 4 |
11 | 9011 | 101 | 211 | 2021-09-24 08:30:00 | 2021-09-24 08:31:00 | 2021-09-24 08:54:00 | 10 | 35 | 5 |
(order_id-订单号, uid-用户ID, driver_id-司机ID, order_time-接单时间, start_time-开始计费的上车时间, finish_time-订单完成时间, mileage-行驶里程数, fare-费用, grade-评分)
场景逻辑说明:
- 用户提交打车请求后,在用户打车记录表生成一条打车记录,order_id-订单号设为null;
- 当有司机接单时,在打车订单表生成一条订单,填充order_time-接单时间及其左边的字段,start_time-开始计费的上车时间及其右边的字段全部为null,并把order_id-订单号和order_time-接单时间(end_time-打车结束时间)写入打车记录表;若一直无司机接单,超时或中途用户主动取消打车,则记录end_time-打车结束时间。
- 若乘客上车前,乘客或司机点击取消订单,会将打车订单表对应订单的finish_time-订单完成时间填充为取消时间,其余字段设为null。
- 当司机接上乘客时,填充订单表中该start_time-开始计费的上车时间。
- 当订单完成时填充订单完成时间、里程数、费用;评分设为null,在用户给司机打1~5星评价后填充。
问题:统计周一到周五各时段的叫车量、平均等待接单时间和平均调度时间。全部以event_time-开始打车时间为时段划分依据,平均等待接单时间和平均调度时间均保留1位小数,平均调度时间仅计算完成了的订单,结果按叫车量升序排序。
注:
- 不同时段定义:早高峰 [07:00:00 , 09:00:00)、工作时间 [09:00:00 , 17:00:00)、晚高峰 [17:00:00 , 20:00:00)、休息时间 [20:00:00 , 07:00:00)
- 时间区间左闭右开(即7:00:00算作早高峰,而9:00:00不算做早高峰)
- 从开始打车到司机接单为等待接单时间,从司机接单到上车为调度时间。
输出示例:
示例数据的输出结果如下:
period | get_car_num | avg_wait_time | avg_dispatch_time |
---|---|---|---|
工作时间 | 1 | 0.5 | 1.7 |
休息时间 | 1 | 0.7 | 2.3 |
晚高峰 | 3 | 2.1 | 7.3 |
早高峰 | 4 | 2.2 | 8.0 |
解释:订单9017打车开始于11点整,属于工作时间,等待时间30秒,调度时间为1分40秒,示例数据中工作时间打车订单就一个,平均等待时间0.5分钟,平均调度时间1.7分钟。
SQL Schema
sql
DROP TABLE IF EXISTS tb_get_car_record,tb_get_car_order;
CREATE TABLE tb_get_car_record
(
id INT PRIMARY KEY AUTO_INCREMENT COMMENT '自增ID',
uid INT NOT NULL COMMENT '用户ID',
city VARCHAR(10) NOT NULL COMMENT '城市',
event_time datetime COMMENT '打车时间',
end_time datetime COMMENT '打车结束时间',
order_id INT COMMENT '订单号'
) CHARACTER SET utf8
COLLATE utf8_bin;
CREATE TABLE tb_get_car_order
(
id INT PRIMARY KEY AUTO_INCREMENT COMMENT '自增ID',
order_id INT NOT NULL COMMENT '订单号',
uid INT NOT NULL COMMENT '用户ID',
driver_id INT NOT NULL COMMENT '司机ID',
order_time datetime COMMENT '接单时间',
start_time datetime COMMENT '开始计费的上车时间',
finish_time datetime COMMENT '订单结束时间',
mileage FLOAT COMMENT '行驶里程数',
fare FLOAT COMMENT '费用',
grade TINYINT COMMENT '评分'
) CHARACTER SET utf8
COLLATE utf8_bin;
INSERT INTO tb_get_car_record(uid, city, event_time, end_time, order_id)
VALUES (107, '北京', '2021-09-20 11:00:00', '2021-09-20 11:00:30', 9017),
(108, '北京', '2021-09-20 21:00:00', '2021-09-20 21:00:40', 9008),
(108, '北京', '2021-09-20 18:59:30', '2021-09-20 19:01:00', 9018),
(102, '北京', '2021-09-21 08:59:00', '2021-09-21 09:01:00', 9002),
(106, '北京', '2021-09-21 17:58:00', '2021-09-21 18:01:00', 9006),
(103, '北京', '2021-09-22 07:58:00', '2021-09-22 08:01:00', 9003),
(104, '北京', '2021-09-23 07:59:00', '2021-09-23 08:01:00', 9004),
(103, '北京', '2021-09-24 19:59:20', '2021-09-24 20:01:00', 9019),
(101, '北京', '2021-09-24 08:28:10', '2021-09-24 08:30:00', 9011);
INSERT INTO tb_get_car_order(order_id, uid, driver_id, order_time, start_time, finish_time, mileage, fare, grade)
VALUES (9017, 107, 213, '2021-09-20 11:00:30', '2021-09-20 11:02:10', '2021-09-20 11:31:00', 11, 38, 5),
(9008, 108, 204, '2021-09-20 21:00:40', '2021-09-20 21:03:00', '2021-09-20 21:31:00', 13.2, 38, 4),
(9018, 108, 214, '2021-09-20 19:01:00', '2021-09-20 19:04:50', '2021-09-20 19:21:00', 14, 38, 5),
(9002, 102, 202, '2021-09-21 09:01:00', '2021-09-21 09:06:00', '2021-09-21 09:31:00', 10.0, 41.5, 5),
(9006, 106, 203, '2021-09-21 18:01:00', '2021-09-21 18:09:00', '2021-09-21 18:31:00', 8.0, 25.5, 4),
(9007, 107, 203, '2021-09-22 11:01:00', '2021-09-22 11:07:00', '2021-09-22 11:31:00', 9.9, 30, 5),
(9003, 103, 202, '2021-09-22 08:01:00', '2021-09-22 08:15:00', '2021-09-22 08:31:00', 11.0, 41.5, 4),
(9004, 104, 202, '2021-09-23 08:01:00', '2021-09-23 08:13:00', '2021-09-23 08:31:00', 7.5, 22, 4),
(9005, 105, 202, '2021-09-23 10:01:00', '2021-09-23 10:13:00', '2021-09-23 10:31:00', 9, 29, 5),
(9019, 103, 202, '2021-09-24 20:01:00', '2021-09-24 20:11:00', '2021-09-24 20:51:00', 10, 39, 4),
(9011, 101, 211, '2021-09-24 08:30:00', '2021-09-24 08:31:00', '2021-09-24 08:54:00', 10, 35, 5);
答案
sql
SELECT CASE
WHEN TIME(tgcr.event_time) >= '07:00:00' AND TIME(tgcr.event_time) < '09:00:00' THEN '早高峰'
WHEN TIME(tgcr.event_time) >= '09:00:00' AND TIME(tgcr.event_time) < '17:00:00' THEN '工作时间'
WHEN TIME(tgcr.event_time) >= '17:00:00' AND TIME(tgcr.event_time) < '20:00:00' THEN '晚高峰'
ELSE '休息时间' END AS `period`,
COUNT(*) AS `get_car_num`,
ROUND(AVG(TIMESTAMPDIFF(SECOND, tgcr.event_time, tgco.order_time) / 60), 1) AS `avg_wait_time`,
ROUND(AVG(TIMESTAMPDIFF(SECOND, tgco.order_time, tgco.start_time) / 60), 1) AS `avg_dispatch_time`
FROM tb_get_car_record tgcr
INNER JOIN tb_get_car_order tgco USING (order_id)
WHERE DAYOFWEEK(tgcr.event_time) BETWEEN 2 AND 6
GROUP BY period
ORDER BY get_car_num;