Example 3-5 Assigning Literals to an INTERVAL YEAR TO MONTH Variable

DECLARE
   lifetime INTERVAL YEAR(3) TO MONTH;
BEGIN
   lifetime := INTERVAL '101-3' YEAR TO MONTH; -- interval literal
   lifetime := '101-3'; -- implicit conversion from character type
   lifetime := INTERVAL '101' YEAR; -- Can specify just the years
   lifetime := INTERVAL '3' MONTH; -- Can specify just the months
END;
/

Example 3-5 Assigning Literals to an INTERVAL YEAR TO MONTH Variable

DECLARE
   lifetime INTERVAL YEAR(3) TO MONTH;
BEGIN
   lifetime := INTERVAL '101-3' YEAR TO MONTH; -- interval literal
   lifetime := '101-3'; -- implicit conversion from character type
   lifetime := INTERVAL '101' YEAR; -- Can specify just the years
   lifetime := INTERVAL '3' MONTH; -- Can specify just the months
END;
/