字段列表中的列“ media_id”不明确

Question

Hi I am trying to get this sql query to work but I keep getting this error, just wondering if someone could point out to me what have I done wrong ?

My sql query

SELECT title,blurb,media_id
FROM media_career_crossref 
INNER JOIN media 
ON media.media_id = media_career_crossref.media_id

I have got a media table and also a media_career_crossref table. the media_id is in the media table the media_id column in the media_career_crossref ref is linked into this table hence the inner join

Could you explain why it is doing this ? and how I would prevent it from happening again.

Answer 1

Both tables (media and media_career_crossref) have a column named media_id. In the SELECT statement, you must specify from which table you want to get the value from. Eg

SELECT title,blurb, media_career_crossref.media_id
FROM media_career_crossref 
INNER JOIN media 
ON media.media_id = media_career_crossref.media_id

Answer 2

Try prefixing the column. engine must know from what table you want to get it

SELECT title,blurb,media.media_id
FROM media_career_crossref 
INNER JOIN media 
ON media.media_id = media_career_crossref.media_id

Answer 3

try it with an alias:

SELECT title,blurb,m.media_id
FROM media_career_crossref mcc
INNER JOIN media m 
ON m.media_id = mcc.media_id