title: Reading two dimensional pl/sql array
body: <p>I am able to insert values but failed to retrieve values. Thanks in anticipation.</p>
  
  <pre><code>declare
    type type1 is table of number;
    type data_type is table of type1;
    y data_type;
  begin
    y := data_type();
    y.extend(100);
    for i in 1..100 loop
      y(i) := type1();
      y(i).extend(100);
      for j in 1..100 loop
        y(i)(j) := i+j; 
      end loop;
    end loop;
  end;
  </code></pre>