How many datafile in tablespace

Hi,
I have migrate database 9i to 10g so some question is required?
how many datafile in tablespace ?
i hv following query is use
select file_name,tablespace_name from dba_data_file ?

Dear Mohamed
Select name, ts#
from v$datafile;
this statment give you only the datafiles
and
select file_name, tablespace_name
from dba_data_files;
give you the tablespace name and datafiles
thank you
Mohamed Tawfik

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thx

Hello,
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>
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>
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How many datafile in tablespace

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