Hi everybody !!!!
How I write FUNCTION IN Oracle, I want to Execute query with Field And table pass by parameter, Example

v_Field NVARCHAR2
v_Table NVARCHAR2

BEGIN
-- Variable pass form cell function.
v_Field = 'Salary';
v_Table = 'Employees'

EXECUTE IMMEDIATE 'SELECT '||v_Field||' FROM '|| v_Table
INTO v_GetValue ;
RETURN v_GetValue ;

END

Thank a lot ...............