title: woocommerce plugin to add database content to product page
body: <p>my problem is that i want to build a price comparison site based on woocommerceand that is exactly my problem.
  i want to develop a plugin, which makes it possible to post a database entry to my product page.
  i tried to add the content with normal sql query with a shortcode, but the content was shown on top of the site.
  the content should be loaded by the SKU number.
  by adding the php functions with shortcode, the content will be shown on top of the site..</p>
  
  <p>do you have any solutions how i can display custom database content to my product description?</p>