oracle常用经典SQL查询Oracle认证考试
文章作者 100test 发表时间 2010:03:08 17:18:18
来源 100Test.Com百考试题网
常用SQL查询:
1、查看表空间的名称及大小
0select 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
0select 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
0select 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$rollstat v
Where r.segment_id = v.usn( )
order by segment_name.
4、查看控制文件
0select name from v$controlfile.
5、查看日志文件
0select member from v$logfile.
6、查看表空间的使用情况
0select sum(bytes)/(1024*1024) as free_space,tablespace_name
from dba_free_space
group by tablespace_name.
SELECT A.TABLESPACE_NAME,A.BYTES TOTAL,B.BYTES USED, C.BYTES FREE,
(B.BYTES*100)/A.BYTES "% USED",(C.BYTES*100)/A.BYTES "% FREE"
FROM SYS.SM$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
0select 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$Database.
10、捕捉运行很久的SQL
column username format a12
column opname format a16
column progress format a8
0select username,sid,opname,
round(sofar*100 / totalwork,0) || % as progress,
time_remaining,sql_text
from v$session_longops , v$sql
where time_remaining