查看数据库的版本
Select version FROM Product_component_version
Where SUBSTR(PRODUCT,1,6)='Oracle';
如何远程判断Oracle数据库的安装平台
select * from v$version;
查看数据库的创建日期和归档方式
Select Created, Log_Mode, Log_Mode From V$Database;
查看数据库库对象
select owner, object_type, status, count(*) count# from all_objects group by owner, object_type, status;
查看日志文件
select member from v$logfile;
查看表空间物理文件的名称及大小
select tablespace_name,
file_id,
file_name,
round(bytes / (1024 * 1024), 0) total_space
from dba_data_files
order by tablespace_name;
查看表空间的使用情况
SELECT A.TABLESPACE_NAME,
A.BYTES TOTAL,
B.BYTES USED,
C.BYTES FREE,
(B.BYTES * 100) / A.BYTES "% USED",
(C.BYTES * 100) / A.BYTES "% FREE"
FROM SYS.SM$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;
耗资源的进程（top session）
select s.schemaname schema_name,
decode(sign(48 - command),
1,
to_char(command),
'Action Code #' || to_char(command)) action,
status session_status,
s.osuser os_user_name,
s.sid,
p.spid,
s.serial# serial_num,
nvl(s.username, '[Oracle process]') user_name,
s.terminal terminal,
s.program program,
st.value criteria_value
from v$sesstat st, v$session s, v$process p
where st.sid = s.sid
and st.statistic# = to_number('38')
and ('ALL' = 'ALL' or s.status = 'ALL')
and p.addr = s.paddr
order by st.value desc, p.spid asc, s.username asc, s.osuser asc
根据sid查是哪台电脑的链接
select osuser,machine,username,sid,serial# from v$session where sid='128';
根据sid查对应的sql
select SID,SQL_TEXT from v$open_cursor where SID='128';