title: Make this query faster?
body: <pre><code>SELECT num, code, LN AS LabelName
  FROM product 
  INNER JOIN link
    ON product.seqno = link.seqno
  INNER JOIN master
    ON link.code = master.code 
  </code></pre>
  
  <p>Like is there any other way to write this SQL?</p>
  
  <pre><code>DB layout is like this:
  
  1)TABLE: product
  num(key)
  ln
  seqno
  
  2)TABLE: link
  seqno(key)
  code(key)
  
  3)Table: master
  code(key)
  </code></pre>