How should the following UDF be invoked in order to convert US currency values stored in the EXPENSES table into Canadian currency?CREATE FUNCTION getratews11 ( country1 VARCHAR(100), country2 VARCHAR(100) ) RETURNS DOUBLE LANGUAGE SQL CONTAINS SQL EXTERNAL ACTION NOT DETERMINISTIC BEGIN ... END（）
- ACALL getratews11('USA','CANADA')
- BCALL expenses.getratews11('USA','CANADA')
- CSELECT getratews11('USA','CANADA') FROM expenses
- DSELECT * FROM TABLE(getratews11('USA','CANADA')) AS convert_currency