title: How to normalize mysql database table
body: <p>For a mysql database I have two similar tables:</p>
  
  <p>1.st table
  <strong>track_tag</strong> (2 million rows)</p>
  
  <p>id (int), track_id (int), tag (varchar)</p>
  
  <p>2.nd table
  <strong>tag</strong> (150.000 rows)</p>
  
  <p>id (int), tag(varchar)</p>
  
  <p>I want to normalize first table tag column with the second table's primary key.
  What is the fastest way to solve this problem?</p>