Oracle基础 01 表空间 tablespace

--查看表空间

select * from dba_tablespaces; 
select * from v$tablespace;

select * from dba_data_files; --查看数据文件
select * from v$datafile;

select * from dba_temp_files; --查看临时文件
select * from v$tempfile;

--查默认表空间和临时表空间

select * from database_properties
where property_name like '%TABLESPACE';

alter user scott default tablespace emp;    --修改soctt默认表空间为emp
grant unlimited tablespace to scott;        --授予scott表空间操纵权限

--创建表空间emp

create tablespace emp                     
datafile '/u01/app/oracle/db/emp01.dbf' size 50m autoextend on next 10m maxsize unlimited;

--表空间组

select * from dba_tablespace_groups;             --查看表空间组

alter tablespace tmp01 tablespace group group1;  --将临时表空间tmp01添加到表空间组group1
alter tablespace tmp02 tablespace group '';      --将临时表空间tmp02从表空间组group1中删除

--表空间离线、在线

alter tablespace emp offline normal;         --表空间归档模式离线
alter tablespace emp offline normal for drop;   --表空间非归档模式离线（慎用）

alter tablespace emp online;           --表空间在线

--重命名表空间

alter tablespace tsname1 rename to tsname2;    --表空间重命名tsname1 成tsname2

--删除表空间

drop tablespace emp including contents and datafiles;   --删除表空间和数据文件

--数据文件的移动

alter tablespace emp offline normal;                                               --先将表空间离线

mv /u01/app/oracle/oradata/dbtest/emp_data.dbf /u01/app/oracle/datafile/           --再移动数据文件到指定目录(linux下)

alter tablespace emp rename datafile'/u01/app/oracle/oradata/dbtest/emp_data.dbf'   
to '/u01/app/oracle/datafile/yd03_data.dbf';                                       --修改控制文件信息                                  
alter tablespace emp online;                                                       --再将表空间上线

--增加数据文件

alter tablespace emp add datafile '/u01/app/oracle/oradata/emp02.dbf'
size 10m;

--增大数据文件

alter database datafile '/u01/app/oracle/oradata/emp01.dbf' resize 50m;

--删除数据文件

alter tablespace emp drop datafile '/u01/app/oracle/emp02.dbf';

--关闭数据文件自动扩展

alter database datafile '/u01/app/oracle/emp01.dbf' autoextend off;

--查看表空间使用情况语句

select upper(f.tablespace_name) "ts-name",
       d.tot_grootte_mb "ts-bytes(m)",
       d.tot_grootte_mb - f.total_bytes "ts-used (m)",
       f.total_bytes "ts-free(m)",
       to_char(round((d.tot_grootte_mb - f.total_bytes) / d.tot_grootte_mb * 100,
                     2),
               '990.99') "ts-per"
         from (select tablespace_name,
               round(sum(bytes) / (1024 * 1024), 2) total_bytes,
               round(max(bytes) / (1024 * 1024), 2) max_bytes
          from sys.dba_free_space
         group by tablespace_name) f,
       (select dd.tablespace_name,
               round(sum(dd.bytes) / (1024 * 1024), 2) tot_grootte_mb
          from sys.dba_data_files dd
         group by dd.tablespace_name) d
where d.tablespace_name = f.tablespace_name
order by 5 desc;

SYS@ test11g> select tablespace_name,sum(bytes)/1024/1024 free_m
  2  from dba_free_space
  3  group by tablespace_name;

TABLESPACE_NAME      FREE_M
---------------- ----------
SYSAUX               35.125
UNDOTBS1                 82
USERS                  .875
SYSTEM               9.8125
EXAMPLE               21.25