create or replace function fj_fun1(fjname varchar2) 
return number is yearsal number(7,2);
begin
select sal*12+nvl(comm,0)*12 into yearsal from tb_Employee where ename=fjname;--执行部分
return yearsal;
end;
/
var abc number;
call  fj_fun1(‘SCOTT‘) into:abc;--调用

create or replace function fj_ft1(
string1 varchar2,
string2 varchar2
) return varchar2 is
begin
return string1||string2;
end;
/
--调用
select fj_ft1(‘hello‘,‘world‘) from dual;
--调用时等效于下面这段
var abc varchar2;
call fj_ft1(‘hello‘,‘world‘) into:abc;