title: SQL query to select distinct row with minimum value
body: <p>I want an SQL statement to get the row with a minimum value. </p>
  
  <p>Consider this table:</p>
  
  <pre><code>id  game   point
  1    x      5
  1    z      4
  2    y      6
  3    x      2
  3    y      5
  3    z      8
  </code></pre>
  
  <p>How do I select the ids that have the minimum value in the <code>point</code> column, grouped by game?  Like the following:</p>
  
  <pre><code>id  game   point    
  1    z      4
  2    y      5
  3    x      2   
  </code></pre>