oracle tablespace usage
-- Size and usage of tablespaces SELECT T1.TABLESPACE_NAME, T1.BYTES / 1024 / 1024 as "bytes_used (Mb)", T2.BYTES / 1024 / 1024 as "bytes_free (Mb)", T2.largest / 1024 / 1024 as "largest (Mb)", round(((T1.BYTES - T2.BYTES) / T1.BYTES) * 100, 2) percent_used FROM ( select TABLESPACE_NAME, sum(BYTES) BYTES from dba_data_files group by TABLESPACE_NAME ) T1, ( select TABLESPACE_NAME, sum(BYTES) BYTES, max(BYTES) largest from dba_free_space group by TABLESPACE_NAME ) T2 where T1.TABLESPACE_NAME = T2.TABLESPACE_NAME order by ((T1.BYTES - T2.BYTES) / T1.BYTES) desc;