title: what does order 1,2 do
body: <p>Imagine  we have following table</p>
  
  <pre><code>create table t
    (item number,
     bin number,
     primary key (bin , item) );
  </code></pre>
  
  <p>I have used  insert into  command to insert several values into table <code>t</code>, now i am interested  in what does  this code</p>
  
  <pre><code>select * from t
    order by 1,2;
  </code></pre>
  
  <p>As far as i know it selects everything from table <code>t</code> and sorts it, because order means to sort selected query  using condition listed in order command, but <code>order 1,2</code> i could not understand  what does it means, could  you help me ?</p>