title: Compare a column in two different tables
body: <p>Say I have two tables, Table A and Table B, and I want to compare a certain column.</p>
  
  <p>For example, </p>
  
  <p>Table A has the columns: IP,Host,App</p>
  
  <p>Table B has the columns: IP,Datacenter,Server,Model,Last_Updated</p>
  
  <p>How do I compare the IP column between the two tables to get the differences?</p>
  
  <p>I know if the tables have the same columns I can use a union and 'minus' to get the differences but I wasn't able to figure out a way if the tables have different columns.</p>
  
  <p>Thanks!</p>