1、增加一个文件：alter tablespace xxx add datafile '/u02/oracle/data/xxx_01.dbf' size 1000M;
2、改变原来数据文件大小：alter database datafile '/u02/oralce/data/xxx_01.dbf' resize 300M;
3、设置自动增长：alter tablespace users add datafile '/u02/oracle/data/xxx_01.dbf' size 10M autoextend on next 1M maxsize 1000M;