＃1052-字段列表中的'bookings.chauffeur_req'列不明确

Question

CREATE VIEW chauffeursreuqired AS 
SELECT  customers.customer_id, customers.fname, customers.lname, bookings.chauffeur_req, bookings.booking_id
FROM bookings, customers inner join bookings
ON customers.customer_id = bookings.customer_id;

Hey all, so Im trying to create a view using an inner join. im getting the error code as in the title. Anyone has an idea what it means that it is 'ambiguous'?

Thanks.

Answer 1

In this line:

FROM bookings, customers inner join bookings

You are joining bookings to customers (using the implicit join operator , ) and then to bookings again. So you have two bookings table in your JOIN and MySQL can't determine which one to fetch that column from.

You probably only meant to include bookings once, try changing your query to

FROM customers inner join bookings

Or if you do need to join the bookings table twice, you can add an alias to the table names to allow them to be distinguished from each other ie

FROM bookings AS bookings_1, customers inner join bookings AS bookings_2