查看数据库所有表空间

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

查看具体表单所占空间

Select Segment_Name,Sum(bytes)/1024/1024 proportion From User_Extents Group By Segment_Name

查看所有表空间占用率

SELECT 
c.ts#, c.name,  
d.contents, d.extent_management, 
e.file_bytes, c.used,
SUBSTR (c.used / e.file_bytes * 100, 1, 5) proportion --占比
FROM (SELECT name, ts#, SUM(used) used
          FROM (SELECT a.allocated_space * (SELECT value  -- 查询db_block_size当前值
                                              FROM v$parameter
                                             WHERE name = 'db_block_size') / 1024/ 1024 used,
                        b.ts#, b.name
                  FROM v$filespace_usage a, v$tablespace b
         WHERE a.tablespace_id = b.ts#)
         GROUP BY name, ts#
) c,dba_tablespaces d,
(SELECT ts#, SUM(bytes) / 1024/ 1024 file_bytes FROM v$datafile GROUP BY ts#) e      
WHERE c.name = d.tablespace_name
   AND e.ts# = c.ts#
ORDER BY ts#

查询临时表空间大小

select c.tablespace_name "表空间",
       Round(c.bytes/1024/1024,2)  "表空间大小(M)",
       Round((c.bytes-d.bytes_used)/1024/1024,2)  "空闲空间(M)",
       Round(d.bytes_used/1024/1024,2)  "已使用空间(M)",
       Round(d.bytes_used*100/c.bytes,2) || '%' "使用率"
from
(select tablespace_name,sum(bytes) bytes
from dba_temp_files Group by tablespace_name) c,
(select tablespace_name,sum(bytes_cached) bytes_used
from v$temp_extent_pool Group by tablespace_name) d
where c.tablespace_name = d.tablespace_name

查询单个session所占用的临时表

SELECT S.sid || ',' || S.serial# sid_serial, S.username, S.osuser, P.spid,
       S.module, P.program, SUM(T.blocks) * TBS.block_size / 1024 / 1024 mb_used,
       T.tablespace, COUNT(*) statements
  FROM v$sort_usage T, v$session S, dba_tablespaces TBS, v$process P
 WHERE T.session_addr = S.saddr
   AND S.paddr = P.addr
   AND T.tablespace = TBS.tablespace_name
 GROUP BY S.sid, S.serial#, S.username, S.osuser, P.spid,
          S.module, P.program, TBS.block_size, T.tablespace
 ORDER BY mb_used desc;

查询每个sql占用的临时表

SELECT S.sid || ',' || S.serial# sid_serial, S.username, Q.hash_value, Q.sql_text,
       T.blocks * TBS.block_size / 1024 / 1024 mb_used, T.tablespace
  FROM v$sort_usage T, v$session S, v$sqlarea Q, dba_tablespaces TBS
 WHERE T.session_addr = S.saddr AND T.sqladdr = Q.address AND T.tablespace = TBS.tablespace_name
 ORDER BY mb_used desc;

查看具体dbf表空间占用率

select b.file_id,/*文件ID*/
　　b.tablespace_name,/*表空间*/
　　b.file_name,/*物理文件名*/
　　b.bytes,/*总字节数*/
　　(b.bytes-sum(nvl(a.bytes,0))) Used,/*已使用*/
　　sum(nvl(a.bytes,0)) surplus,/*剩余*/
　　sum(nvl(a.bytes,0))/(b.bytes)*100　proportion/*剩余百分比*/
from dba_free_space a,dba_data_files b
where a.file_id=b.file_id
group by b.tablespace_name,b.file_name,b.file_id,b.bytes
order by b.tablespace_name

检查数据文件路径

Select * From dba_data_files t where t.TABLESPACE_NAME = 'CREAMMINT';

追加数据文件

Alter Tablespace CREAMMINT Add Datafile '/data3/oradata/creammint/creammint001.dbf' SIZE 20G;

扩容原数据文件

alter database datafile '/ssddata/oradata/creammint/creammint001.dbf' RESIZE 20G;

缩小临时表

alter database tempfile 'D:\ORACLE\PRODUCT\10.2.0\ORADATA\TELEMT\TEMP01.DBF' resize 100M;