SQL>
SQL> CREATE OR REPLACE FUNCTION AverageGrade (p_Course IN NUMBER) RETURN VARCHAR2 AS
2 v_NumericGrade varchar(1);
3 BEGIN
4 SELECT DECODE(ROUND(p_Course), 5, 'A',
5 4, 'B',
6 3, 'C',
7 2, 'D',
8 1, 'E')
9 INTO v_NumericGrade
10 FROM dual;
11
12 RETURN v_NumericGrade;
13 END AverageGrade;
14 /
Function created.
SQL>
SQL> select AverageGrade(1) from dual;
AVERAGEGRADE(1)
----------------------
E