ORACEL 常用命令

ORACLE EBS操作某一个FORM界面，或者后台数据库操作某一个表时发现一直出于"假死"状态，可能是该表被某一用户锁定，导致其他用户无法继续操作 代码如下:

 --锁表查询SQL：
  SELECT object_name, machine, s.sid, s.serial#
 FROM gv$locked_object l, dba_objects o, gv$session s
 WHERE l.object_id　= o.object_id
 AND l.session_id = s.sid; 

找到被锁定的表，解锁代码如下:

--释放SESSION SQL:
--alter system kill session 'sid, serial#';
ALTER system kill session '23, 1647'; 

--、查看表空间的名称及大小
SELECT t.tablespace_name, round(SUM(bytes / ( * )), ) ts_size
FROM dba_tablespaces t, dba_data_files d
WHERE t.tablespace_name = d.tablespace_name
GROUP BY t.tablespace_name;
--、查看表空间物理文件的名称及大小
SELECT tablespace_name,
file_id,
file_name,
round(bytes / ( * ), ) total_space
FROM dba_data_files
ORDER BY tablespace_name;
--、查看回滚段名称及大小
SELECT segment_name,
tablespace_name,
r.status,
(initial_extent / ) initialextent,
(next_extent / ) nextextent,
max_extents,
v.curext curextent
FROM dba_rollback_segs r, v$rollstat v
WHERE r.segment_id = v.usn(+)
ORDER BY segment_name;
--、查看控制文件
SELECT NAME FROM v$controlfile;
--、查看日志文件
SELECT MEMBER FROM v$logfile;
--、查看表空间的使用情况
SELECT SUM(bytes) / ( * ) AS free_space, tablespace_name
FROM dba_free_space
GROUP BY tablespace_name;
SELECT a.tablespace_name,
a.bytes total,
b.bytes used,
c.bytes free,
(b.bytes * ) / a.bytes "% USED ",
(c.bytes * ) / a.bytes "% FREE "
FROM sys.sm$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;
--、查看数据库库对象
SELECT owner, object_type, status, COUNT(*) count#
FROM all_objects
GROUP BY owner, object_type, status;
--、查看数据库的版本　
SELECT version
FROM product_component_version
WHERE substr(product, , ) = 'Oracle';
--、查看数据库的创建日期和归档方式
SELECT created, log_mode, log_mode FROM v$database; 

 --1G=1024MB
 --1M=1024KB
 --1K=1024Bytes
 --1M=11048576Bytes
 --1G=*11048576Bytes=11313741824Bytes
 SELECT a.tablespace_name "表空间名",
 total "表空间大小",
 free "表空间剩余大小",
 (total - free) "表空间使用大小",
 total / ( *  * ) "表空间大小(G)",
 free / ( *  * ) "表空间剩余大小(G)",
 (total - free) / ( *  * ) "表空间使用大小(G)",
 round((total - free) / total, ) *  "使用率 %"
 FROM (SELECT tablespace_name, SUM(bytes) free
 FROM dba_free_space
 GROUP BY tablespace_name) a,
 (SELECT tablespace_name, SUM(bytes) total
 FROM dba_data_files
 GROUP BY tablespace_name) b
 WHERE a.tablespace_name = b.tablespace_name