title: Copy a dataset B for each variable in dataset A
body: <p>I have the two following datasets:</p>
  <p><em>Dataset A</em>:</p>
  <pre><code>ID  
  A      
  B      
  C 
  </code></pre>
  <p><em>Dataset B</em>:</p>
  <pre><code>Age 
  35        
  49      
  53
  </code></pre>
  <p>And I want to copy paste B to each ID of A:</p>
  <pre><code>ID  Age 
  A   35
  A   49
  A   53
  B   35
  B   49
  ...
  </code></pre>
  <p>For the moment I do this with a %do cicle but is there a more elegant way to do this? With a single PROC SQL or Datastep for example?</p>
  <p>Thanks in advance</p>