Is there a way to fetch associative array grouped by the values of a specified column with PDO?

Question

For example, let\'s use some simple data set

+---------+------+------+------------+
| name    | age  | sex  | position   |
+---------+------+------+---------         


        

Answer 1

This answer is out of date, please see this other answer instead.

---

It looks like there's no way to do this as part of fetchAll.

Your best bet is going to be creating a class that extends PDO, adding a utility method to it.

public function queryKeyedAssoc($query, $params, $key) {
    $sth = $this->prepare($query);
    $sth->execute($params);
    $res = array();
    while($row = $sth->fetch(PDO::FETCH_ASSOC))
        $res[ $row[$key] ] = $row;
    return $res;
}