Final answer:
To delete flights operated by 'cheap airline', use the SQL DELETE statement with a WHERE clause that specifies the airline. It's important to check for correct conditions and foreign key constraints.
Step-by-step explanation:
To delete all flights operated by a specific airline, such as 'cheap airline', you will need to execute a SQL DELETE statement against the database. The precise SQL statement will depend on how the database schema is set up, but a general example might look like this:
DELETE FROM flights WHERE airline = 'cheap airline';
This command will remove every record in the 'flights' table where the 'airline' column matches the value 'cheap airline'. It's crucial to ensure that the condition in the WHERE clause is correct to prevent unintended deletions. Also, be mindful of any foreign key constraints that might require additional considerations or deletions from other tables.