Tablespaces
From dbawiki
User quotas on all tablespaces
col quota format a10
select username
, tablespace_name
, decode ( max_bytes
, -1, 'unlimited'
, ceil(max_bytes / 1024 / 1024)||'M'
) quota
from dba_ts_quotas
where 1=1
and tablespace_name not in ('TEMP');