Question

here is my query:

SELECT * FROM 
   (SELECT messages.*, 
   users.* 
   FROM `afo_messages` as messages 
   INNER JOIN `key_users` as users ON messages.user_id = users.id 
   WHERE messages.category_id=5 
   ORDER BY messages.id DESC LIMIT 30) ilv 
ORDER BY messages.id ASC

Error is “#1060 – Duplicate column name ‘id'”.

Table afo_messages columns:

id | user_id | category_id | parent_id | message | create_date | update_date | status

Table key_users columns:

id | name | email | phone | pwd | active | role | invite_id | download_link | date

What I’m doing wrong?

Thanx!

Answer 1

Pretty sure that when you run the inner query, the result set has two columns called ID (on from messages, one from users); you’re then running a query on that subquery, and the parser doesn’t understand it.

Try:

SELECT * FROM 
(SELECT messages.id as message_id,
       messages.user_id, 
       ....all other columns from messages

       users.id as real_user_id, 
       users.name, 
       ..... all other columns from users
FROM `afo_messages` as messages 
INNER JOIN `key_users` as users ON messages.user_id = users.id 
WHERE messages.category_id=5 
ORDER BY messages.id DESC LIMIT 30) ilv 
ORDER BY message_id ASC