title: Insert into one column data from two columns
body: <pre><code>Table A
  Col1 Col2
  101  102
  101  103
  102  104
  104  105
  
  Table B
  Col1
  101
  102
  103
  104
  105
  </code></pre>
  
  <p>I want to take data from Table A and insert it into Table B as a Distinct value in one query
  so <code>INSERT INTO TableB (Col1) (SELECT ...)</code></p>
  
  <p>Any ideas?</p>