title: How to compare two columns to find unmatched records in MySQL
body: <p>I have a MySQL table with 2 columns and each column has thousands of records</p>
  
  <p>For Example 15000 Email addresses in Column1 and 15005 Email addresses in column 2</p>
  
  <p>How to find those 5 records from 15005 which are unmatched in column1?</p>
  
  <p>I wish MySql query to compare both columns and give result of only 5 unmatched records</p>
  
  <p>Thanks </p>