之前现场反馈一个数据更新的问题，查看感觉是因为表空间满了导致的（错误在之前的博客随笔中写过），因此远程对服务器进行查看。个人平常都是通过Oracle客户端的Entreprise Manager Console进行查看的，但是发现服务器上只安装了Oracle服务端并且不能正常进行网页登录查看。
因此到网上查了一下查看Oracle表空间使用情况的查询语句，通过PLSQL进行查询查看，在这里记录一下，另外附几个常用的Oracle以及SDE命令。
查看表空间的使用情况（解决此次问题使用）
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$TS_FREE C
WHERE A.TABLESPACE_NAME=B.TABLESPACE_NAME AND A.TABLESPACE_NAME=C.TABLESPACE_NAME;
解决这个问题通过修改表空间为自增长即可（自增长的幅度要大一点，通过本地存放文件来设置）
ALTER DATABASE DATAFILE 'D:\ORACLE\PRODUCT\10.2.0\ORADATA\ORCL\BUSINESS.DBF' AUTOEXTEND ON NEXT 100M MAXSIZE UNLIMITED
上面的语句为把'D:\ORACLE\PRODUCT\10.2.0\ORADATA\ORCL\BUSINESS.DBF' 这个文件的自增长设置为100M
附：
Oracle维护常用SQL （经过PLSQL中测试）
1、查看表空间的名称及大小
select t.tablespace_name, round(sum(bytes/(1024*1024)),0) ts_size
from dba_tablespaces t, dba_data_files d
where t.tablespace_name = d.tablespace_name
group by t.tablespace_name;
2、查看表空间物理文件的名称及大小
select tablespace_name, file_id, file_name,round(bytes/(1024*1024),0) total_space
from dba_data_files
order by tablespace_name;
3、查看回滚段名称及大小
select segment_name, tablespace_name, r.status,
(initial_extent/1024) InitialExtent,(next_extent/1024) NextExtent,
max_extents, v.curext CurExtent
From dba_rollback_segs r, v$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、查看数据库库对象
select owner, object_type, status, count(*) count# from all_objects group by owner, object_type, status;
7、查看数据库的版本
Select version FROM Product_component_version
Where SUBSTR(PRODUCT,1,6)='Oracle';
8、查看数据库的创建日期和归档方式
Select Created, Log_Mode, Log_Mode From V$Database;
9、如何远程判断Oracle数据库的安装平台
select * from v$version;
10、查看数据表的参数信息
SELECT partition_name, high_value, high_value_length, tablespace_name,
pct_free, pct_used, ini_trans, max_trans, initial_extent,
next_extent, min_extent, max_extent, pct_increase, FREELISTS,
freelist_groups, LOGGING, BUFFER_POOL, num_rows, blocks,
empty_blocks, avg_space, chain_cnt, avg_row_len, sample_size,
last_analyzed
FROM dba_tab_partitions
--WHERE table_name = :tname AND table_owner = :towner
ORDER BY partition_position
11、查看还没提交的事务
select * from v$locked_object;
select * from v$transaction;
12、回滚段查看
select rownum, sys.dba_rollback_segs.segment_name Name, v$rollstat.extents
Extents, v$rollstat.rssize Size_in_Bytes, v$rollstat.xacts XActs,
v$rollstat.gets Gets, v$rollstat.waits Waits, v$rollstat.writes Writes,
sys.dba_rollback_segs.status status from v$rollstat, sys.dba_rollback_segs,
v$rollname where v$rollname.name(+) = sys.dba_rollback_segs.segment_name and
v$rollstat.usn (+) = v$rollname.usn order by rownum
13、捕捉运行很久的SQL
select username,sid,opname,
round(sofar*100 / totalwork,0) || '%' as progress, time_remaining,sql_text
from v$session_longops , v$sql
where sql_address = address
and sql_hash_value = hash_value
14、查看数据表的参数信息
SELECT partition_name, high_value, high_value_length, tablespace_name,
pct_free, pct_used, ini_trans, max_trans, initial_extent,
next_extent, min_extent, max_extent, pct_increase, FREELISTS,
freelist_groups, LOGGING, BUFFER_POOL, num_rows, blocks,
empty_blocks, avg_space, chain_cnt, avg_row_len, sample_size,
last_analyzed
FROM dba_tab_partitions
--WHERE table_name = :tname AND table_owner = :towner
ORDER BY partition_position
15、查找object为哪些进程所用
select p.spid,s.sid,s.serial# serial_num,s.username user_name,a.type object_type,s.oSUSEr os_user_name,a.owner,
a.object object_name,decode(sign(48 - command),1,to_char(command), 'Action Code #' || to_char(command) ) action,
p.program oracle_process,s.terminal terminal,s.program program,s.status session_status
from v$session s, v$access a, v$process p
where s.paddr = p.addr and s.type = 'USER' and a.sid = s.sid and a.object='SUBSCRIBER_ATTR'
order by s.username, s.osuser
16、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$process p
where st.sid = s.sid and st.statistic# = to_number('38') and ('ALL' = 'ALL'
or s.status = 'ALL') and p.addr = s.paddr order by st.value desc, p.spid asc, s.username asc, s.osuser asc
17、查看锁（lock）情况
select /*+ RULE */ ls.osuser os_user_name, ls.username user_name,decode(ls.type, 'RW', 'Row wait enqueue lock', 'TM', 'DML enqueue lock', 'TX','Transaction enqueue lock', 'UL', 'User supplied lock') lock_type,o.object_name object, decode(ls.lmode, 1, null, 2, 'Row Share', 3,'Row Exclusive', 4, 'Share', 5, 'Share Row Exclusive', 6, 'Exclusive', null)
lock_mode, o.owner, ls.sid, ls.serial# serial_num, ls.id1, ls.id2
from sys.dba_objects o, ( select s.osuser, s.username, l.type, l.lmode, s.sid, s.serial#, l.id1, l.id2 from v$session s,
v$lock l where s.sid = l.sid ) ls where o.object_id = ls.id1