oracle数据库表空间扩展

//查看表空间情况

SELECT Upper(F.TABLESPACE_NAME) "表空间名",D.TOT_GROOTTE_MB "表空间大小(M)",D.TOT_GROOTTE_MB - F.TOTAL_BYTES "已使用空间(M)",To_char(Round(( D.TOT_GROOTTE_MB - F.TOTAL_BYTES ) / D.TOT_GROOTTE_MB * 100, 2), '990.99')|| '%' "使用比",F.TOTAL_BYTES "空闲空间(M)",F.MAX_BYTES "最大块(M)"FROM (SELECT TABLESPACE_NAME,Round(Sum(BYTES) / ( 1024 * 1024 ), 2) TOTAL_BYTES,Round(Max(BYTES) / ( 1024 * 1024 ), 2) MAX_BYTESFROM SYS.DBA_FREE_SPACEGROUP BY TABLESPACE_NAME) F,(SELECT DD.TABLESPACE_NAME,Round(Sum(DD.BYTES) / ( 1024 * 1024 ), 2) TOT_GROOTTE_MBFROM SYS.DBA_DATA_FILES DDGROUP BY DD.TABLESPACE_NAME) DWHERE D.TABLESPACE_NAME = F.TABLESPACE_NAMEORDER BY 1

//查询表空间文件存放位置

select tablespace_name, file_id, file_name,round(bytes/(1024*1024),0) total_space from dba_data_files order by tablespace_name

//增加表空间的语句

ALTER TABLESPACE  表空间名 ADD DATAFILE
'+DATADG/orcl/datafile/SP07_05.dbf' SIZE 30720M;

--- 表空间 的文件路径'+DATADG/orcl/datafile/SP07_05.dbf'              

创建新表空间和新用户实例：

create TABLESPACE  ssdev  DATAFILE
'E:\APP\WUJJ\ORADATA\ORCL\SSDEV.DBF' SIZE 100M;

create user ssdev identified by wujingjun default tablespace ssdev;

grant connect,resource to ssdev;
grant create session to ssdev;