Operation Details
Description: Method to count concern role types per concern role.
Sterotype: ns
SQL 
 SELECT
   COUNT(DISTINCT CR2.concernRoleType)
 INTO
   :count
 FROM
   ConcernRole INNER JOIN ConcernRole CR2 ON ConcernRole.concernID = CR2.concernID
 WHERE
 ConcernRole.concernRoleID = :concernRoleID