Edbtype::TEDBYearMonthInterval __fastcall
      SubtractDateFromDateAsYearMonth(System::TDateTime FirstValue,
      System::TDateTime SecondValue, TEDBYearMonthIntervalType
      YearMonthIntervalType)

 In ElevateDB, year-month intervals are Integer values that represent the number of days that have elapsed between two calendar days. Use the TEDBEngine YearMonthIntervalToSQLStr method to convert a year-month interval into a readable string.