Question

Is it possible to use SELECT statement in MySQL such that key of the result-set rows is the actual PK of table rows?

result set = PHP associative arrays

PK is auto-increment

Answer 1

There is no native function to do that.

But you can quite easily iterate that resultset and set keys by your own.

$data = array();
while ($row = mysql_fetch_assoc($result)) {
    $data[ $row['id'] ] = $row;
}