Question

I’m getting

Error Number: 1066

Not unique table/alias: 'default_event_rel_type'

my query is:

SELECT `default_users`.`username` as user,
       `default_event_rel_type`.`title` as title
  FROM (`default_event_rel`, `default_event_rel_type`)
  JOIN `default_users` ON `default_event_rel`.`uid` = `default_users`.`id`
  JOIN `default_event_rel_type` ON `default_event_rel_type`.`id` = `default_event_rel`.`eid`

Answer 1

Looks like you have incorrect syntax in your FROM clause. You are calling default_event_rel_type twice. And you only need to call it once in your JOIN. You don’t need to have it in the FROM clause.

SELECT `default_users`.`username` as user, `default_event_rel_type`.`title` as title 
FROM `default_event_rel`
JOIN `default_users` 
    ON `default_event_rel`.`uid` = `default_users`.`id` 
JOIN `default_event_rel_type` 
    ON `default_event_rel_type`.`id` = `default_event_rel`.`eid`