Create a view named 'train_details_with_deviation' to display the metro train id,position and updated time of all the trains having deviation.

To create a SQL view named train_details_with_deviation that displays the metro train ID, position, and updated time of all trains having deviations, you would typically follow these steps. Here’s how you can approach this task:

1. ### Break Down the Problem

1. Identify the relevant tables containing the train information, including IDs, positions, updated times, and deviation status.
2. Determine the criteria for what constitutes a train "having deviation."

2. ### Relevant Concepts

• SQL View: A virtual table based on the result set of a SQL statement.
• SELECT Statement: To retrieve the required columns from the train data tables.
• WHERE Clause: To filter the trains with deviation.

3. ### Analysis and Detail

If we assume there is a table called trains that has the columns train_id, position, updated_time, and deviation_status, our SQL query to create the view would look something like this:

CREATE VIEW train_details_with_deviation AS
SELECT 
    train_id, 
    position, 
    updated_time 
FROM 
    trains 
WHERE 
    deviation_status = 'Deviated';  -- Assuming 'Deviated' indicates a deviation.

4. ### Verify and Summarize

• Run the query to ensure it executes without any errors.
• Check the data returned to verify it accurately reflects the trains with deviations.

Final Answer

The final SQL command to create the view is:

CREATE VIEW train_details_with_deviation AS
SELECT 
    train_id, 
    position, 
    updated_time 
FROM 
    trains 
WHERE 
    deviation_status = 'Deviated'; 

Use this SQL to create your view, ensuring that you adapt the table name and column names based on your actual database schema if they are different.