Answer / ashok

select sum(bytes/1024/1024) from dba_data_file;
it is the size of totaldatafiles

Answer / karthickumar pillaiyarsamy

select sum(a.blocks)+sum(b.blocks) from dba_data_files a,
v$log b;

Answer / pvenkiroyal

here is the exact answer for the size of oracle databaase...

select (select sum(bytes/1024/1024/1024) from
dba_data_files)+(select sum(bytes/1024/1024/1024) from
dba_temp_files)+(select sum(bytes/1024/1024/1024) from
v$log)"size in GB" from dual;

Answer / suman

please clear.....
how we check the size of database. In above answer we check only the database data file size.

But database also contain temporary datafile also.
we check database size--datafile+temp datafiles.

if we use dba_data_file-- it show only datafile size no temp datafile which also include with database size. kindly clear ----

Answer / vani bhargavi

In general the size of the database is defined as total
size of the physical datafiles.

The following query will help you for the space management
of your database.

Code:

clear breaks
clear computes
clear columns
set pagesize 50
set linesize 120
set heading on
column tablespace_name heading 'Tablespace' justify left
format a20 truncated
column tbsize heading 'Size|(Mb) ' justify left format
9,999,999.99
column tbused heading 'Used|(Mb) ' justify right format
9,999,999.99
column tbfree heading 'Free|(Mb) ' justify right format
9,999,999.99
column tbusedpct heading 'Used % ' justify left format a8
column tbfreepct heading 'Free % ' justify left format a8
break on report
compute sum label 'Totals:' of tbsize tbused tbfree on
report
select t.tablespace_name, round(a.bytes,2) tbsize,
nvl(round(c.bytes,2),'0') tbfree,
nvl(round(b.bytes,2),'0') tbused,
to_char(round(100 * (nvl(b.bytes,0)/nvl(a.bytes,1)),2))
|| '%' tbusedpct,
to_char(round(100 * (nvl(c.bytes,0)/nvl(a.bytes,1)),2))
|| '%' tbfreepct
from dba_tablespaces t,
(select tablespace_name, round(sum(bytes)/1024/1024,2)
bytes
from dba_data_files
group by tablespace_name
union
select tablespace_name, round(sum(bytes)/1024/1024,2) bytes
from dba_temp_files
group by tablespace_name ) a,
(select e.tablespace_name, round(sum(e.bytes)/1024/1024,2)
bytes
from dba_segments e
group by e.tablespace_name
union
select tablespace_name, sum(max_size) bytes
from v$sort_segment
group by tablespace_name) b,
(select f.tablespace_name, round(sum(f.bytes)/1024/1024,2)
bytes
from dba_free_space f
group by f.tablespace_name
union
select tmp.tablespace_name, (sum(bytes/1024/1024) - sum
(max_size)) bytes
from dba_temp_files tmp, v$sort_segment sort
where tmp.tablespace_name = sort.tablespace_name
group by tmp.tablespace_name) c
where
t.tablespace_name = a.tablespace_name (+)
and t.tablespace_name = b.tablespace_name (+)
and t.tablespace_name = c.tablespace_name (+)
order by t.tablespace_name
/

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