如何查看oracle表空间已使用大小

如何查看oracle表空间已使用大小

1. 查看所有表空间大小

select tablespace_name,sum(bytes)/1024/1024 from dba_data_files
roup by tablespace_name;

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

 

2. 未使用的表空间大小 

select tablespace_name,sum(bytes)/1024/1024 from dba_free_space
 group by tablespace_name;

select tablespace_name,sum(bytes)/1024/1024 from dba_free_space 
 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;

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; 

 


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

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

SQL> spool out.txt 
SQL> select * from v$database; 
SQL> spool off

 

6.如何查看oracle临时表空间当前使用了多少空间的大小？
不是占用量，是当前正在使用的临时表空间大小

 

SELECT SE.USERNAME,
       SE.SID,
       SU.EXTENTS,
       SU.BLOCKS * TO_NUMBER(RTRIM(P.VALUE)) AS SPACE,
       TABLESPACE,
       SEGTYPE,
       SQL_TEXT
  FROM V$SORT_USAGE SU, V$PARAMETER P, V$SESSION SE, V$SQL S
 WHERE P.NAME = 'db_block_size'
   AND SU.SESSION_ADDR = SE.SADDR
   AND S.HASH_VALUE = SU.SQLHASH
   AND S.ADDRESS = SU.SQLADDR
 ORDER BY SE.USERNAME, SE.SID;

SELECT SE.USERNAME,
       SE.SID,
       SU.EXTENTS,
       SU.BLOCKS * TO_NUMBER(RTRIM(P.VALUE)) AS SPACE,
       TABLESPACE,
       SEGTYPE,
       SQL_TEXT
  FROM V$SORT_USAGE SU, V$PARAMETER P, V$SESSION SE, V$SQL S
 WHERE P.NAME = 'db_block_size'
   AND SU.SESSION_ADDR = SE.SADDR
   AND S.HASH_VALUE = SU.SQLHASH
   AND S.ADDRESS = SU.SQLADDR
 ORDER BY SE.USERNAME, SE.SID;

 

 

查询所有的表空间

 

select tablespace_name from dba_tablespaces

select tablespace_name from dba_tablespaces

 

 查看表空间中分布的用户信息

select tablespace_name, owner,sum(bytes) from dba_segments
group by tablespace_name, owner

select tablespace_name, owner,sum(bytes) from dba_segments
group by tablespace_name, owner