表空间22

7.8 表空间

--查询表空间

select tablespace_name,

count(*) as extends,

round(sum(bytes) / 1024 / 1024, 2) as MB,

sum(blocks) as blocks from dba_free_space group by tablespace_name;

--查询表空间总容量

select tablespace_name,

sum(bytes) / 1024 / 1024 as MB from dba_data_files group by tablespace_name;

--查询表空间使用率

select total.tablespace_name,

round(total.MB, 2) as Total_MB,

round(total.MB - free.MB, 2) as Used_MB,

round((1 - free.MB / total.MB) * 100, 2) || '%' as Used_Pct from (select tablespace_name,

sum(bytes) / 1024 / 1024 as MB from dba_free_space group by tablespace_name) free,

(select tablespace_name,

sum(bytes) / 1024 / 1024 as MB from dba_data_files group by tablespace_name) total where free.tablespace_name = total.tablespace_name;

--增加表空间

alter tablespace xxxx add datafile '/u01/xxxx' size 1000M;

---查看表空间2

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

查看表空间文件

select * from dba_data_files;

修改表空间

alter database datafile '/opt/oracle/oradata/sdprpt/rsdp_rpt_rpt_user_data_0001.dbf' resize 1024M￡?