Question

Task 4:

The Car Maintenance team wants to add new maintenance tasks into the system. The team has determined that there should be Tire Change (ID: 1) task for every car with the model year 2018 in InstantRide. Due date of this maintenance tasks is 31 December, 2020. Insert the rows into the MAINTENANCES table for every car built in 2018 and send the data back to the team.
Task
Create tire maintenance tasks for each car with a model year of 2022.

Answer 1

The task requires adding new entries to a table in a database for cars built in 2022 to schedule tire maintenance. An SQL command is used to insert this task for all relevant cars, which is typically executed in a database management system.

Step-by-step explanation:

The question involves a task related to database management, specifically the insertion of rows into an existing table based on certain criteria. To create tire maintenance tasks for each car with a model year of 2022, you would be required to perform an INSERT INTO operation on the MAINTENANCES table. Assuming you're using SQL, the command might look similar to:

INSERT INTO MAINTENANCES (task_id, car_id, due_date)
SELECT 1, id, '2020-12-31'
FROM CARS
WHERE model_year = 2022;

This SQL command selects all cars from the CARS table where the model year is 2022, and inserts a new row into the MAINTENANCES table with the task_id for tire change (which is assumed to be 1 in this scenario), the corresponding car_id from the CARS table, and sets the due date for the task to 31 December, 2020.

Answer 2

Assuming your MAINTENANCES table has columns like CarID, TaskID, and DueDate, the query is given below.

-- Assuming your table structure is something like this

-- MAINTENANCES table: CarID, TaskID, DueDate

-- Inserting tire change tasks for cars with model year 2018 in InstantRide

INSERT INTO MAINTENANCES (CarID, TaskID, DueDate)

SELECT CarID, 1 AS TaskID, '2020-12-31' AS DueDate

FROM CARS

WHERE ModelYear = 2018 AND Manufacturer = 'InstantRide';

-- Inserting tire maintenance tasks for each car with a model year of 2022

INSERT INTO MAINTENANCES (CarID, TaskID, DueDate)

SELECT CarID, 1 AS TaskID, '2023-12-31' AS DueDate

FROM CARS

WHERE ModelYear = 2022;