two things

[sunilvmahanti]

Hi,

wen i'm trying to take online tablespace begin bakup it 'ld give an error msg that is "media recovery is not enabled' how i slov it and the another one is how can i add one database tablespace datafiles into another database.

regards

sunil.

[paragp1981]

first is becuase you db is not in archive log mode.
and second you cant do as you think. you can use transportable tablespaces or export import.