title: Apply a single trigger procedure to many different tables
body: <p>In my PostgreSQL 9.1 database I have multiple tables and one trigger function. </p>
  
  <p>Right now I am creating the trigger for each table by using that trigger function.</p>
  
  <p>This methodology working fine. My boss has asked me to create the trigger commonly (only one time) by re-using that trigger function. That one trigger function should get used by all the tables in my database. </p>