http://blog.csdn.net/fangke/archive/2004/09/23/114714.ASPx常用的查看數據庫的SQL查看數據庫的SQL 1、查看表空間的名稱及大小 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、查看表空間物理文件的名稱及大小 select tablespace_name, file_id, file_name, round(bytes/(1024*1024),0) total_space from dba_data_files order by tablespace_name; 3、查看回滾段名稱及大小 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$logfile; 6、查看表空間的使用情況 select sum(bytes)/(1024*1024) as free_space,tablespace_name from dba_free_space group by tablespace_name; SELECT A.TABLESPACE_NAME,A.BYTES TOTAL,B.BYTES USED, C.BYTES FREE, (B.BYTES*100)/A.BYTES '% USED',(C.BYTES*100)/A.BYTES '% FREE' FROM SYS.SM$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、查看數據庫庫對象 select owner, object_type, status, count(*) count# from all_objects group by owner, object_type, status; 8、查看數據庫的版本　 Select version FROM ProdUCt_component_version Where SUBSTR(PRODUCT,1,6)='OracleƏ、查看數據庫的創建日期和歸檔方式 Select Created, Log_Mode, Log_Mode From V$Database;