Oracle 表空間常用sql

--查詢表空間使用情況
select a.tablespace_name,
       a.bytes / 1024 / 1024 "sum MB",
       (a.bytes - b.bytes) / 1024 / 1024 "used MB",
       b.bytes / 1024 / 1024 "free MB",
       round(((a.bytes - b.bytes) / a.bytes) * 100, 2) "used%"
  from (select tablespace_name, sum(bytes) bytes
          from dba_data_files
         group by tablespace_name) a,
       (select tablespace_name, sum(bytes) bytes, max(bytes) largest
          from dba_free_space
         group by tablespace_name) b
 where a.tablespace_name = b.tablespace_name
 order by ((a.bytes - b.bytes) / a.bytes) desc;
 
 --查看錶空間的名字及文件在哪
select tablespace_name,
       file_id,
       file_name,
       round(bytes / (1024 * 1024), 0) total_space
  from dba_data_files
 order by tablespace_name;
 
 --解決方案
alter tablespace USERS
add datafile '/u01/oracle/oradata/sonar/users02.dbf' size 32700m