text: 
  /*
   *  src: https://stackoverflow.com/questions/95967/how-do-you-list-the-primary-key-of-a-sql-server-table
   */
  
  SELECT Col.Column_Name from 
      INFORMATION_SCHEMA.TABLE_CONSTRAINTS Tab, 
      INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE Col 
  WHERE 
      Col.Constraint_Name = Tab.Constraint_Name
      AND Col.Table_Name = Tab.Table_Name
      AND Constraint_Type = 'PRIMARY KEY'
      AND Col.Table_Name = 'Event'