I am getting the error "Integrity constraint violation: 1052 Column 'restaurant_id' in where clause is ambiguous' in"
.
a) How do I use bindparam on JOIN? Is that even the problem causing this error?
function restaurant(PDO $dbh, $username) {
global $dbh;
$stmt = $dbh->prepare("
SELECT *
FROM users u
INNER JOIN menues m
ON u.user_id = m.restaurant_id
INNER JOIN users_slider s
ON m.restaurant_id = s.restaurant_id
WHERE restaurant_id = :restaurant_id
");
$stmt->bindParam(":restaurant_id", $_GET['r']);
$stmt->execute();
return $stmt->fetchAll();
}
Change
...
WHERE restaurant_id = :restaurant_id
to
...
WHERE m.restaurant_id = :restaurant_id
^^
请使用m.restaurant_id
或s.restaurant_id
在根据您的表格状况可以解决您的问题的地方。
Always use alias for avoiding conflict in join query . Here restaurant_id
should be m.restaurant_id
.
Try this query :-
SELECT *
FROM users u
INNER JOIN menues m
ON u.user_id = m.restaurant_id
INNER JOIN users_slider s
ON m.restaurant_id = s.restaurant_id
WHERE m.restaurant_id =:restaurant_id
put where condition like WHERE m.restaurant_id = :restaurant_id
function restaurant(PDO $dbh, $username) {
global $dbh;
$stmt = $dbh->prepare("
SELECT *
FROM users u
INNER JOIN menues m
ON u.user_id = m.restaurant_id
INNER JOIN users_slider s
ON m.restaurant_id = s.restaurant_id
WHERE m.restaurant_id = :restaurant_id
");
$stmt->bindParam(":restaurant_id", $_GET['r']);
$stmt->execute();
return $stmt->fetchAll();
}
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