Hi Learners! This is a real-world SQL interview problem. It has been asked in the Data Analyst Interview of Uber.
You can practice this problem by your own, below is the DDl and DML commands:
CREATE TABLE `sys`.`trips` (
`id` INT NOT NULL,
`client_id` VARCHAR(45) NULL,
`driver_id` VARCHAR(45) NULL,
`city_id` VARCHAR(45) NULL,
`status` VARCHAR(45) NULL,
`request_at` date NULL,
PRIMARY KEY (`id`));
insert into trips values (1 , '1' , '10' , '1' , 'completed' , '2023-10-01' ),
(2 , '2' , '11' , '1' , 'cancelled_by_driver' , '2023-10-01' ),
(3 , '3' , '12' , '6' , 'completed' , '2023-10-01' ),
(4 , '4' , '13' , '6' , 'cancelled_by_client' , '2023-10-01' ),
(5 , '1' , '10' , '1' , 'completed' , '2023-10-02' ),
(6 , '2' , '11' , '6' , 'completed' , '2023-10-02' ),
(7 , '3' , '12' , '6' , 'completed' , '2023-10-03' ),
(8 , '2' , '12' , '12' , 'completed' , '2023-10-03' ),
(9 , '3' , '10' , '12' , 'completed' , '2023-10-03' ),
(10 , '4' , '13' , '12' , 'cancelled_by_driver' , '2023-10-03' );
CREATE TABLE `sys`.`uber_users` (
`user_id` INT NOT NULL,
`banned` VARCHAR(45) NULL,
`role` VARCHAR(45) NULL,
PRIMARY KEY (`user_id`));
insert into uber_users values
(1, 'No', 'client'),
(2, 'Yes', 'client'),
(3, 'No', 'client'),
(4, 'No', 'client'),
(10, 'No', 'driver'),
(11, 'No', 'driver'),
(12, 'No', 'driver'),
(13, 'No', 'driver');
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In this video, we will be discussing the step-by-step approach to the solution.
For a detailed understanding of SQL, refer to my Master SQL series.
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If you also have an interesting problem that was asked in any of your previous interviews, do share it in the comment box and if I find it interesting, I will make a solution video on that in the future.
Thank You
Vipul Gupta
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