内部加入后，“where子句中的列'id'是不明确的”？

Question

I had this select query which worked fine until I performed an inner join.

$id = (int) $_GET['id'];
$data = mysql_query("
SELECT 
    events.start_datetime, 
    events.EVENT_NAME,
    events.START_TIME,
    events.END_TIME, 
    events.VENUE_LOCATION,
    venues.VENUE_NAME
FROM 
    events 
INNER JOIN venues 
        ON events.VENUE_LOCATION = venues.ID 
WHERE 
    id = ".$id) or die(mysql_error());

The $id variable is so that the query loads data from a row depending on the url (ie: page.php?id=1).

Any idea what's wrong? Thanks

Answer 1

venues probably has an id field too, so you need to specify events.id, not just id, i.e.

$id = (int) $_GET['id'];
$data = mysql_query("
SELECT 
    events.start_datetime, 
    events.EVENT_NAME,
    events.START_TIME,
    events.END_TIME, 
    events.VENUE_LOCATION,
    venues.VENUE_NAME
FROM 
    events 
INNER JOIN venues 
        ON events.VENUE_LOCATION = venues.ID 
WHERE 
    events.id = ".$id) or die(mysql_error());