oracle查看数据文件位置

查看表空间使用率：

SELECT SUM(bytes) / (1024 * 1024) AS free_space, tablespace_name
FROM dba_free_space
GROUP BY tablespace_name;
SELECT a.tablespace_name,
a.bytes total,
b.bytes used,
c.bytes free,
(b.bytes * 100) / a.bytes "% USED ",
(c.bytes * 100) / a.bytes "% FREE "
FROM sys.sm$ts_avail a, sys.sm$ts_used b, sys.sm$ts_free c
WHERE a.tablespace_name = b.tablespace_name
AND a.tablespace_name = c.tablespace_name; 

查看数据文件位置

Select * FROM DBA_DATA_FILES;

添加表空间：

ALTER TABLESPACE "USERS" ADD DATAFILE '/u02/app/ora11g/users03.dbf' SIZE 8G;