title: How to join two tables
body: <p>Table1 </p>
  
  <pre><code>Date        v1  
  05/01/2010  26          
  05/02/2010  31   
  05/03/2010  50  
  </code></pre>
  
  <p>Table2 </p>
  
  <pre><code>Date        v2 v3  
  05/01/2010  42 jkl  
  05/02/2010  28 mno  
  05/03/2010  12 pqr  
  05/04/2010  13 stv  
  05/06/2010  48 8965 
  </code></pre>
  
  <p>How can I join the above two tables so that my result look similar to below</p>
  
  <pre><code>Date        v1   v2   v3  
  05/01/2010  26   42   jkl   
  05/02/2010  31   28   mno  
  05/03/2010  50   12   pqr  
  05/04/2010   0   13   stv  
  05/06/2010   0   48   8965 
  </code></pre>