--看錶空間大小 select a.a1 表空間名稱, c.c2 類型, c.c3 區管理, b.b2/1024/1024 表空間大小M, (b.b2-a.a2)/1024/1024 已使用M, substr((b.b2-a.a2)/b.b2*100,1,5) 利用率 from (select tablespace_name a1, sum(nvl(bytes,0)) a2 from dba_free_space group by tablespace_name) a, (select tablespace_name b1,sum(bytes) b2 from dba_data_files group by tablespace_name) b, (select tablespace_name c1,contents c2,extent_management c3 from dba_tablespaces) c where a.a1=b.b1 and c.c1=b.b1; ---查看錶空間名稱 select tablespace_name,table_name from INFO_USER_BASIC where table_name='USERS' ---查詢表空間名的表空間文件存放位置 select * from dba_data_files where tablespace_name='USERS'; ---礦展表空間 alter tablespace users add datafile 'D:\APP\ADMINISTRATOR\ORADATA\ORCL\USERS03.DBF' size 10240m autoextend on;