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.dbf and .ora data files explained

Sorry for the basic question, but I am trying to understand the difference between a .dbf and .ora data file. Is there one? I have an existing 8i database with datafile users01.dbf (no autoextend) and another users02.ora (autoextend). Any help would be appreciated.
There is no difference. You can have any data file extension you want. You could create a tablespace with data files that have a ".txt" extension. Oracle will not stop you from doing this. But it is good practice to use ".dbf" for Oracle database data files. Some people also use ".ora". If you query DBA_DATA_FILES, you should see both types in your database. The file extension has no bearing on anything as far as Oracle is concerned.
This was last published in May 2005

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