ORACLE - CHECK DATABASE SIZE

TO CHECK DATABASE SIZE, USE THIS SQL IN TOAD OR SQLPLUS :



select ROUND( ( a.data_size + b.temp_size +
c.redo_size + d.cf_size +
e.bct_size)
/1024/1024/1024
) "total_GB_size"
from
( select SUM(bytes) data_size from v$datafile) a,
( select NVL(sum(bytes),0) temp_size from v$tempfile) b,
( select SUM(bytes) redo_size from v$log) c,
( select SUM(block_size*file_size_blks) cf_size from v$controlfile) d,
( select NVL(bytes,0) bct_size from v$block_change_tracking) e


 total_GB_size = 215


select a.data_size+b.temp_size+c.redo_size "total_size"
from ( select sum(bytes)/1024/1024 data_size
from dba_data_files )a,
( select nvl(sum(bytes),0)/1024/1024 temp_size
from dba_temp_files ) b,
( select sum(bytes)/1024/1024 redo_size
from sys.v_$log ) c