Task: Text to Code
Input (English): SQL: SELECT customer_id , other_customer_details FROM Customers ORDER BY date_became_customer Asc LIMIT 1
Feedback: Exchange customer id , other customer details , customers table with channel code , contact number , customer contact channels and find largest value of difference between active from date and active to date .
Output (English): SELECT channel_code ,  contact_number FROM customer_contact_channels WHERE active_to_date - active_from_date  =  (SELECT active_to_date - active_from_date FROM customer_contact_channels ORDER BY (active_to_date - active_from_date) DESC LIMIT 1)