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php - MySQL join another table value based on 2 different tables matching value?

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score 852 · Answer 1

Answer

Solution:

Your query looks quite fine. You would just need to qualify columnuser_id in thefrom clause with the table it belongs to:

SELECT j.price, p.profilepic
FROM Jobs j
INNER JOIN Offers o  ON o.job_id = j.job_id
INNER JOIN Profile p ON o.user_id = p.user_id
WHERE p.user_id = ?  -- or j.user_id = ?

score 291 · Answer 2

Answer

Solution:

MySQL doesn't like that you have two identical columns nameduserid. So simply choose one for the where clause

$sql="SELECT
       j.price,
      p.profilepic
      FROM Jobs j
      INNER JOIN Offers o  ON o.job_id = j.job_id
      INNER JOIN Profile p ON o.user_id = p.user_id
      WHERE j.user_id=?";
$stmt = $conn->prepare($sql);
$stmt->bind_param("i",$_SESSION['user_id']);
$stmt->execute();
$stmt->bind_result($price,$profilepic);
$stmt->fetch();

See example https://www.db-fiddle.com/f/wUqVKNZy96RjR7hTk3md7o/6