Operation Details
Description: Searches for all sub-columns by a parentID and returns their minimum and maximum values.
Sterotype: nsmulti
SQL
SELECT
  rateColumnID,
  rateColumnKeyMin,
  rateColumnKeyMax
INTO
  :rateColumnID,
  :rateColumnKeyMin,
  :rateColumnKeyMax 
FROM
  RateColumn 
WHERE parentColumnID = :rateColumnID