Pl/sql block returning sql query.

Question

Hello,
I am using oracle 10g apex 3.2 version.
I am using the following return statement inside my report which is pl/sql block returning sql query.
declare
pid varchar2(100);
begin
return 'select patient_id_code from t_files_data_exp where patient_id_code not in pid';
end;
How am i suppose to mention the pid inside the return stmt i mean with any quotes or anything? because the above return stmt gives error
"1 error has occurred
Query cannot be parsed within the Builder. If you believe your query is syntactically correct, check the ''generic columns'' checkbox below the region source to proceed without parsing. The query can not be parsed, the cursor is not yet open or a function returning a SQL query returned without a value."
Thanks

Answer 1

Hello,
I did exactly the way u told
declare
pid varchar2(100) := '(61092,61093)';
begin
return 'select patient_id_code from t_files_data_exp where patient_id_code not in ' || pid;
end;
patient_id_code is varchar2(100) only in table.
For this i am getting "invalid number error".
Thanks