CONCAT SQL

Please help, I am stuck on how to alias both the email and the to_field. Thank you for your time

****The challenge*

Challenge Task 1 of 2 In the library database there's a patrons table listing all the users of the library. The columns are id, first_name, last_name, address, email, library_id and zip_code.

Generate a list of strings that are in the following format: Andrew Chalkley andrew@teamtreehouse.com. Concatenate the first name, last name and email address for all users.

Alias it to to_field. This will be used in the "To" field in email marketing.

Type in your command below, then press Ctrl-Enter

*The very unhelpful hint Bummer: There's something wrong with your SQL statement. Please review your code and try again.

*My code*

SELECT first_name || " " || last_name|| " " || email AS "<email>", AS to_field FROM patrons;