How can I loop through all rows of a table? (MySQL)

Question

I have a table A and there is one primary key ID.

Now I want to go through all rows in A.

I found something like \'for each record in A\', but this seems to

Answer 1

    Use this:

    $stmt = $user->runQuery("SELECT * FROM tbl WHERE ID=:id");
    $stmt->bindparam(":id",$id);
    $stmt->execute();

        $stmt->bindColumn("a_b",$xx);
        $stmt->bindColumn("c_d",$yy);


    while($rows = $stmt->fetch(PDO::FETCH_BOUND))
    {
        //---insert into new tble
    }