1、查看表空间的名称及大小select t.tablespace_name, round(sum(bytes/(1024*1024)),0) ts_size
from dba_tablespaces t, dba_data_files d
where t.tablespace_name = d.tablespace_name
group by t.tablespace_name; 2、查看表空间物理文件的名称及大小select tablespace_name, file_id, file_name,
round(bytes/(1024*1024),0) total_space
from dba_data_files
order by tablespace_name;3、查看回滚段名称及大小select segment_name, tablespace_name, r.status,
(initial_extent/1024) InitialExtent,(next_extent/1024) NextExtent,
max_extents, v.curext CurExtent
From dba_rollback_segs r, v$rollstat v
Where r.segment_id = v.usn(+)
order by segment_name ;4、查看控制文件select name from v$controlfile;5、查看日志文件select member from v$logfile;6、查看表空间的使用情况select sum(bytes)/(1024*1024) as free_space,tablespace_name
from dba_free_space
group by tablespace_name;SELECT A.TABLESPACE_NAME,A.BYTES TOTAL,B.BYTES USED, C.BYTES FREE,
(B.BYTES*100)/A.BYTES "% USED",(C.BYTES*100)/A.BYTES "% FREE"
FROM SYS.SM$TS_AVAIL A,SYS.SM$TS_USED B,SYS.SM$TS_FREE C
WHERE A.TABLESPACE_NAME=B.TABLESPACE_NAME AND A.TABLESPACE_NAME=C.TABLESPACE_NAME; 7、查看数据库库对象select owner, object_type, status, count(*) count# from all_objects group by owner, object_type, status;8、查看数据库的版本 Select version FROM PRodUCt_component_version
Where SUBSTR(PRODUCT,1,6)='Oracle';9、查看数据库的创建日期和归档方式Select Created, Log_Mode, Log_Mode From V$Database;
