title: Make a list of most used keywords
body: <p>I have a mysql table with these columns: id, text, keywords.</p>
  
  <p>ID is an id. Text is a title. Keywords is a list of tags in this format: <code>tag1 tag2 tag3</code>.</p>
  
  <p>How would I go about getting a list of the most used keywords in the column? Eg. if I wanted to build a tag cloud from all the items in the table.</p>