title: MySQL add days to a date
body: <p>I have a table in MySQL. What would be the sql statement look like to add say 2 days to the current date value in the table?</p>
  
  <pre><code>UPDATE classes 
  SET 
  date = date + 1
  where id = 161
  </code></pre>
  
  <p>this adds one second to the value, i don't want to update the time, i want to add two days?</p>