1：查看所有表空間及表空間大小： select tablespace_name ,sum(bytes) / 1024 / 1024 as MB from dba_data_files group by tablespace_name; 2：查看所有表空間對(duì)應(yīng)的數(shù)據(jù)文件大小： select tablespace_name,file_name from dba_data_files;