本文主要是介绍SQL笔试题:网约车司机完单情况分析,希望对大家解决编程问题提供一定的参考价值,需要的开发者们随着小编来一起学习吧!
一个数据工作者面试数据相关岗位,SQL查询语句是必不可少的笔试环节,今天给大家带来了某厂一道面试题,附上参考答案,希望能够帮到大家!
◎ 根据司机完单表求2017年7月1日-2017年7月31日,有过10天以上的完单并且总完单量在20单以上的司机id,司机姓名,司机完单天数、司机完单数
◎ 根据司机信息表(driver_info)和司机汇总表(driver_collect)取出近2017.07.01-2017.07.31完单大于30单的司机姓名及电话
司机完单表 driver_daily
司机id | 司机名称 | 城市id | 城市名称 | 订单id | 年 | 月 | 日 |
---|---|---|---|---|---|---|---|
driver_id | driver_name | city_id | city_name | ordre_id | year | month | day |
111 | 王** | 32 | 厦门市 | 12233 | 2017 | 7 | 1 |
202 | 林** | 32 | 厦门市 | 32234 | 2017 | 9 | 1 |
司机信息表 driver_info
driver_id | driver_name | driver_phone |
---|---|---|
110 | 王** | 159*****4134 |
111 | 林** | 159*****7134 |
222 | 张** | 159*****8134 |
司机汇总表 driver_collect
driver_id | order_id | year | month | day |
---|---|---|---|---|
111 | 111 | 2017 | 7 | 1 |
222 | 112 | 2017 | 7 | 1 |
数据扩展
因为题目中给的数据样例比较少,因此给大家扩展了些数据,方便大家理解与练习,下图只截取部分数据,完整数据可以在文末查看。
司机完单表
司机汇总表
参考解答
※ 2017年7月1日-2017年7月31日,有过10天以上的完单并且总完单量在20单以上的司机id,司机姓名,司机完单天数、司机完单数
☆ 解析:
① 2017年7月1日-2017年7月31日 – 可通过WHERE
筛选年是2017,月份是7。
② 司机完单天数、司机完单数 – 先通过司机ID进行聚合,并对完单天数和完单量进行聚合求和。
③ 10天以上的完单并且总完单量在20单以上 – 聚合后通过HAVING
筛选即可。
SELECT driver_id,driver_name,COUNT(DISTINCT d_day)完单天数,COUNT(DISTINCT order_id)完单数
FROM driver_daily
WHERE d_year=2017 AND d_month=7
GROUP BY driver_id
HAVING 完单天数 >=10 AND 完单数 >= 20;
☆ 结果:
driver_id | driver_name | 完单天数 | 完单数 |
---|---|---|---|
202 | 林** | 11 | 21 |
※ 近2017.07.01-2017.07.31完单大于30单的司机姓名及电话
☆ 解析:
① 完单在司机汇总表,司机姓名及电话在司机信息表,因此需要将两个表链接。
② 2017.07.01-2017.07.31 – 可通过WHERE
筛选年是2017,月份是7。
③ 完单大于30单 – 需要按照司机ID driver_id
聚合,将订单ID聚合后计数,再通过HAVING
筛选大于30单的数据。
SELECT driver_name,driver_phone,COUNT(DISTINCT order_id)
FROM driver_info
LEFT JOIN driver_collect
ON driver_info.driver_id = driver_collect.driver_id
WHERE d_year=2017 AND d_month=7
GROUP BY driver_info.driver_id
HAVING COUNT(DISTINCT order_id) > 30;
☆ 结果:
driver_name | driver_phone | count(distinct order_id) |
---|---|---|
张** | 159****8134 | 31 |
建表与导数
为方便小伙伴们操作联系,数据库建表和导入数据代码给你贴出来了。
# create database STUDIO;
use STUDIO;create table driver_daily(
driver_id varchar(10),
driver_name varchar(10),
city_id varchar(10),
city_name varchar(10),
order_id varchar(10),
d_year int,
d_month int,
d_day int
);insert into driver_daily values
('111','王**','32','厦门市','12233',2017,7,1),
('111','王**','32','厦门市','12234',2017,7,1),
('111','王**','32','厦门市','12235',2017,7,1),
('111','王**','32','厦门市','12236',2017,7,1),
('111','王**','32','厦门市','12237',2017,7,1),
('111','王**','32','厦门市','12238',2017,7,1),
('111','王**','32','厦门市','12239',2017,7,1),
('111','王**','32','厦门市','12240',2017,7,1),
('111','王**','32','厦门市','12241',2017,7,1),
('111','王**','32','厦门市','12242',2017,7,1),
('111','王**','32','厦门市','12243',2017,7,1),
('111','王**','32','厦门市','12244',2017,7,1),
('111','王**','32','厦门市','12245',2017,7,1),
('111','王**','32','厦门市','12246',2017,7,1),
('111','王**','32','厦门市','12247',2017,7,1),
('111','王**','32','厦门市','12248',2017,7,1),
('111','王**','32','厦门市','12249',2017,7,1),
('111','王**','32','厦门市','12250',2017,7,1),
('111','王**','32','厦门市','12251',2017,7,1),
('111','王**','32','厦门市','12252',2017,7,1),
('202','林**','32','厦门市','32234',2017,7,1),
('202','林**','32','厦门市','32235',2017,7,1),
('202','林**','32','厦门市','32236',2017,7,2),
('202','林**','32','厦门市','32237',2017,7,2),
('202','林**','32','厦门市','32238',2017,7,3),
('202','林**','32','厦门市','32239',2017,7,3),
('202','林**','32','厦门市','32240',2017,7,4),
('202','林**','32','厦门市','32241',2017,7,4),
('202','林**','32','厦门市','32242',2017,7,5),
('202','林**','32','厦门市','32243',2017,7,5),
('202','林**','32','厦门市','32244',2017,7,6),
('202','林**','32','厦门市','32245',2017,7,6),
('202','林**','32','厦门市','32246',2017,7,7),
('202','林**','32','厦门市','32247',2017,7,7),
('202','林**','32','厦门市','32248',2017,7,7),
('202','林**','32','厦门市','32249',2017,7,8),
('202','林**','32','厦门市','32250',2017,7,8),
('202','林**','32','厦门市','32251',2017,7,8),
('202','林**','32','厦门市','32252',2017,7,9),
('202','林**','32','厦门市','32253',2017,7,9),
('202','林**','32','厦门市','32254',2017,7,10),
('202','林**','32','厦门市','32254',2017,7,11);create table driver_info(
driver_id varchar(10),
driver_name varchar(10),
driver_phone varchar(20)
);insert into driver_info values('110','王**','159****4134'),('111','林**','159****7134'),('222','张**','159****8134');create table driver_collect(
driver_id varchar(10),
order_id varchar(10),
d_year int,
d_month int,
d_day int
);insert into driver_collect values('111','111',2017,7,1),('222','112',2017,7,1),('222','113',2017,7,2),('222','114',2017,7,3),('222','115',2017,7,4),('222','116',2017,7,5),('222','117',2017,7,6),('222','118',2017,7,7),('222','119',2017,7,8),('222','120',2017,7,9),('222','121',2017,7,10),('222','122',2017,7,11),('222','123',2017,7,12),('222','124',2017,7,13),('222','125',2017,7,14),('222','126',2017,7,15),('222','127',2017,7,16),('222','128',2017,7,17),('222','129',2017,7,18),('222','130',2017,7,19),('222','131',2017,7,20),('222','132',2017,7,21),('222','133',2017,7,22),('222','134',2017,7,23),('222','135',2017,7,24),('222','136',2017,7,25),('222','137',2017,7,26),('222','138',2017,7,27),('222','139',2017,7,28),('222','140',2017,7,29),('222','141',2017,7,30),('222','142',2017,7,31),('222','143',2017,9,31);select * from driver_daily;
select * from driver_info;
select * from driver_collect;
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