zoukankan      html  css  js  c++  java
  • oracle表空间使用情况查询

    1. 查看所有表空间大小

    SQL> select tablespace_name,sum(bytes)/1024/1024 from dba_data_files
    2 group by tablespace_name;

    2. 已经使用的表空间大小
    SQL> select tablespace_name,sum(bytes)/1024/1024 from dba_free_space
    2 group by tablespace_name;

    3. 所以使用空间可以这样计算

    select a.tablespace_name,total,free,total-free used from
    ( select tablespace_name,sum(bytes)/1024/1024 total from dba_data_files
    group by tablespace_name) a,
    ( select tablespace_name,sum(bytes)/1024/1024 free from dba_free_space
    group by tablespace_name) b
    where a.tablespace_name=b.tablespace_name

    搜索

    _name;

    4. 下面这条语句查看所有segment的大小。
    Select Segment_Name,Sum(bytes)/1024/1024 From User_Extents Group By Segment_Name

    5. 还有在命令行情况下如何将结果放到一个文件里。
    SQL> spool out.txt
    SQL> select * from v$database;
    SQL> spool off
  • 相关阅读:
    Spring----Day03
    Spring----Day02
    python
    python
    python
    python
    python
    python
    python
    python
  • 原文地址:https://www.cnblogs.com/moonfans/p/4365039.html
Copyright © 2011-2022 走看看