Not able to execute pipelined function?

Question

i have created this
create or replace type assm as object(c1c number,c2 number);
create or replace type asn as table of assm;
1 create or replace function claim(ref_date date,start_month varchar2(20)) return asn.assm pipelined as
2 i number;
3 j number;
4 k number;
5 mytype asn.assn;
6 begin
7 mytype.c1c:=to_char(ref_date,'dd');
8 if start_month is null then
9 i:=12;
10 else
11 i:=to_number(to_char(to_date(to_char(start_month),'mon'),'mm'));
12 k:=i;
13 j:=to_number(to_char(ref_date,'mm'));
14 if k!=1 then
15 while(i<=1) loop
16 select to_char(to_date(to_char(i),'mm'),'mon'),(select count(*) from employees,dept where
employees.department_id=dept.ddepartment_id and
to_char(hire_date,'monyyyy')=to_char(to_date(to_char(i),'mm'),'mon')||to_char(to_number(to_char(ref_date,'yyyy')-4))) as a1 into mytype.c2 from dual;
17 pipe row(mytype);
18 i:=i+1;
19 end loop;
20 return;
21 exception when others then
22 dbms_output.put_line('error'||sqlcode||sqlerrm);
23 return;
24 end;
iam getting the following errors
1/50 PLS_00103- Encountered the following symbol ")"
16/49 pls-00103- Encountered the symbol select
16/255 encountered the symbol ")"

Answer 1

Procedure/function parameters have data type, not length/precision. So parameter start_month should be VARCHAR2, not VARCHAR2(20). Your code also references uninitialized object.
SY.