This procedure enables you to add a datafile to a tablespace. Therefore, make sure you have enough free disk space on the drive where the tablespace
is stored.
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With the System Administration window open, click DBA > Add Datafiles.
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From the Tablespace list, select the tablespace you want to resize.
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In the Datafile name box, type the full path and name of a new additional datafile that you want to attach to the currently selected tablespace.
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Ensure that you select a datafile that is not currently in use.
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The datafile format must be .ddti.
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In the Datafile size box, type the size of the additional datafile.
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Click OK and make sure the software displays a message notifying you that the selected tablespace was increased successfully.