How to view all of the table spaces for Oracle ____oracle

SQL: Method One: Select Dbf.tablespace_name, Dbf.totalspace "Total (m)", Dbf.totalblocks as Total block number, dfs.freespace "remaining total (m)", Dfs.freebl Ocks "Number of remaining blocks", (dfs.freespace/dbf.totalspace) * 100 "free proportions" from (select T.tablespace_name, sum (t.bytes)/1024/1024 tot Alspace, sum (t.blocks) totalblocks from Dba_data_files T Group by T.tablespace_name) DBF, (select Tt.tablespace_name, SUM (  tt.bytes)/1024/1024 freespace, sum (tt.blocks) freeblocks from Dba_free_space TT GROUP by Tt.tablespace_name) Dfs where Trim (dbf.tablespace_name) = Trim (Dfs.tablespace_name) method two: Select Total.name "tablespace name", Free_space, (Total_spac E-free_space) Used_space, total_space from (select Tablespace_name, sum (bytes/1024/1024) free_space from Sys.dba_free_ Space GROUP by Tablespace_name) free, (select B.name, sum (bytes/1024/1024) Total_space from Sys.v_$datafile A, sys.v_$tab Lespace B where a.ts# = b.ts# GROUP by b.name) Total where free.tablespace_name = Total.name