Sequence Number problem.

Question

I have situation like this:
I am creating text files from a procedure and i am making FILE NAME as follows.
v_file_name := v_document_code || '_' || p_printer_id || '_' || p_quote_ref_id || '_' || v_reference_id;
All above values i have in my procedure, now i need to insert a sequence number ( or a Auto Number thing) for a file such that everytime when any file created it should have a different number.
I tried sequence number concept but i am not getting any result.
I have made a sequence SEQ_DAT_FILE_NUMBER and used it as follows
v_file_number := ' SELECT SEQ_DAT_FILE_NUMBER.NEXTVAL '
|| ' FROM DUAL ' ;
v_file_name := v_file_number || '_' || v_document_code || '_' || p_printer_id || '_' || p_quote_ref_id || '_' || v_reference_id;
but i didn't get any result.
Please provide any information to solve this problem.
Thanks in Advance.
Regards,
AgrawalV

Answer 1

if you didn't get any result, what you have got.... i mean an error or an worng output or what....
there seems to be no problem in the code, except the method of fetching the sequence number in the variable,
v_file_number := ' SELECT SEQ_DAT_FILE_NUMBER.NEXTVAL '
|| ' FROM DUAL ' ; rather do like this:
SELECT SEQ_DAT_FILE_NUMBER.NEXTVAL INTO v_file_number FROM DUAL;