如何查看oracle所有的資料表空間____oracle

SQL:方法一：select dbf.tablespace_name,dbf.totalspace "總量(M)",dbf.totalblocks as 總塊數,dfs.freespace "剩餘總量(M)",dfs.freeblocks "剩餘塊數",(dfs.freespace / dbf.totalspace) * 100 "空閑比例" from (select t.tablespace_name,sum(t.bytes) / 1024 / 1024 totalspace,sum(t.blocks) totalblocksfrom dba_data_files tgroup by t.tablespace_name) dbf,(select tt.tablespace_name,sum(tt.bytes) / 1024 / 1024 freespace,sum(tt.blocks) freeblocksfrom dba_free_space ttgroup by tt.tablespace_name) dfswhere trim(dbf.tablespace_name) = trim(dfs.tablespace_name)方法二：SELECT Total.name "Tablespace Name",Free_space, (total_space-Free_space) Used_space, total_spaceFROM(select tablespace_name, sum(bytes/1024/1024) Free_Spacefrom sys.dba_free_spacegroup by tablespace_name) Free,(select b.name, sum(bytes/1024/1024) TOTAL_SPACEfrom sys.v_$datafile a, sys.v_$tablespace Bwhere a.ts# = b.ts#group by b.name) TotalWHERE Free.Tablespace_name = Total.name