Oracle check TBS usage

select d.tablespace_name,

space||'M' "SUM_SPACE(M")",

blocks "SUM_BLOCKS",

space - nvl(free_space, 0) || ‘M’ “USED_SPACE(M)",

round((1-nvl(free_space, 0)/space) * 100 , 2)|| '%'

"USED_RATE(%)",

free_space || 'M' "FREE_SPACE(M)"

from (select tablespace_name,

round(sum(bytes)/(1024*1024),2) space,

sum(blocks) blocks

from dba_data_files

group by tablespace_name) d,

(select tablespace_name, round(sum(bytes)/(1024*1024),2) free_space

from dba_free_space

group by tablespace_name) f

where d.tablespace_name=f.tablespace_name(+);