错误：字段列表中的列“ id”不明确php mysqli

Question

I have two table :

news:

|id|title|image|timestamp|....

tags:

|id|books_id|...

for result:

("SELECT id,title,front_thumbs,short_desc,timestamp,counter,author,
  FROM " . NEWS . " LEFT JOIN " . TAGS . " ON " NEWS . ".id = " . TAGS . ".content_id WHERE 
" . TAGS . ".tags_id = ? AND approved = 1 ORDER BY timestamp DESC LIMIT 10", $id)

but I see this error:

Error: Column 'id' in field list is ambiguous 

how do fix this error?

Answer 1

You need alias. Yuo have 2 tables both with column id . In your select you request id without specifying which of them you need.

You need to specify table here (before id ):

... ("SELECT id,title,front_thumbs,short ...

Answer 2

When both tables have same field name it gets ambiguous and to solve this use SELECT NEWS.id or TAGS.id which table's id you are using:

"SELECT NEWS.id,title,front_thumbs,short_desc,timestamp,counter,author,
FROM " . NEWS . " LEFT JOIN " . TAGS . " ON " NEWS . ".id = " . TAGS .    ".content_id WHERE 
" . TAGS . ".tags_id = ? AND approved = 1 ORDER BY timestamp DESC LIMIT 10", $id)