Size of my database ??

Question

How can i find the complete size of my database. Do we have any query that can find the size or is there any other way to do it.

Answer 1

select sum(bytes)/1024/1024/1024 "Your database size in gb' from dba_data_files ;
select sum(bytes)/1024/1024/1024 " Free Space" from dba_free_space;This will result, how much space is allocated to all of the segments.
select sum(bytes)/1024/1024/1024  from dba_data_files ;
minus
select sum(bytes)/1024/1024/1024  from dba_free_space;This will reveal, what is used and allocated space to all of the tablespace sitting in datatbase.
set pagesize 100                                                                                 
set linesize 200                                                                                     
break on report                                                                                      
compute sum of free_mb on report                                                                     
compute sum of act_size on report                                                                    
compute sum of used_mb on report                                                                     
col %used format 999.99                                                                              
col %Free format 999.99                                                                              
col act_size format 99,99,999.99                                                                     
col free_mb format 99,99,999.99                                                                      
col used_mb format 99,99,999.99                                                                      
col file_name for a60                                                                                
col largest_extent_MB format 99,99,999.99                                                            
col tablespace for a25                                                                               
select SUBSTR(a.tablespace_name,1,20) "TABLESPACE",act_size,free_mb,                                 
free_mb*100/act_size "%FREE",                                                                        
act_size-free_mb used_MB,((act_size-free_mb)*100)/act_size "%USED",largest_extent_MB                 
from (SELECT TABLESPACE_NAME,SUM(BYTES)/1024/1024 FREE_MB,                                           
max(bytes)/1024/1024 largest_extent_MB                                                               
FROM DBA_FREE_SPACE group by tablespace_name) a,                                                     
(SELECT TABLESPACE_NAME,SUM(BYTES)/1024/1024 ACT_SIZE FROM                                           
DBA_DATA_FILES group by tablespace_name) b                                                           
where a.tablespace_name(+)=b.tablespace_name                                                         
order by 1hare krishna
Edited by: Alok Kumar on Aug 2, 2010 11:14 AM