where子句中的列是不明确的 - 这是什么意思？

Question

I've come across this error in MySQL for the join clause but I'm fairly new to the JOIN argument and I'm not sure what this means. Can anyone help?

Column 'id' in where clause is ambiguous

SELECT * FROM (`venues`) 
JOIN `venues_meta` ON `venues_meta`.`venue_id` = `venues`.`id` 
WHERE `id` = '12'

Answer 1

您需要完全限定id ，因为venues和venues_meta都有一个称为列id 。

Answer 2

I think you want:

SELECT * FROM `venues` v, `venues_meta` m  where v.venue_id = m.id AND  m.id = '12'

(but be sure it's v.venue_id you want and not v.id)

Answer 3

Try this Code

SELECT v.*
FROM `venues` AS `v` 
INNER JOIN `venues_meta` AS `vm` ON `vm`.`venue_id` = `v`.`id` 
WHERE `v`.`id` = '12'