alter tablespace add datafile
SELECT * FROM DBA_DATA_FILES WHERE TABLESPACE_NAME = 'my_tbs' ORDER BY FILE_NAME;
ALTER TABLESPACE my_tbs ADD DATAFILE '/path/to/my_file.dbf'
SIZE 100M AUTOEXTEND OFF;
-- Autoextend with max size:
ALTER TABLESPACE my_tbs ADD DATAFILE '/path/to/my_file.dbf'
SIZE 10G AUTOEXTEND ON NEXT 1G MAXSIZE 32000M;
-- For TEMP tablespace:
ALTER TABLESPACE my_tbs ADD TEMPFILE '/path/to/my_file.dbf'
SIZE 100M AUTOEXTEND OFF;