title: what is the difference between collect statistics multi column or single column in teradata
body: <pre><code>collect statistics column(column1,column2,column3) on table ;
  and 
  collect statistics column(column1) on table ;
  collect statistics column(column2) on table ;
  collect statistics column(column3) on table ;
  </code></pre>
  
  <p>What is the difference in both ways of collecting stats and what are the pros and cons of both in teradata?</p>