title: MySQL Query needed: I need to delete all data from a single column
body: <p>I have an ecommerce store that I am currently working on and there are approx 300 products which have a field named "product_url"</p>
  
  <p>These fields contains an old url that I need to delete altogether.</p>
  
  <p>How can I create a query that will replace all "product_url" fields with data in them witha null value?</p>