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建立 表空间 CREATE TABLESPACE data01 DATAFILE ‘/oracle/oradata/db/DATA01.dbf‘ SIZE 500M UNIFORM. SIZE 128k; #指定区尺寸为128k,如不指定，区尺寸默认为64k 删除表空间 DROP TABLESPACE data01 INCLUDING CONTENTS AND DATAFILES; 一、建立表空间 CREATE TABLESPACE data01 DATAFILE ‘/oracle/oradata/db/DATA01.dbf‘ SIZE 500M UNIFORM. SIZE 128k; #指定区尺寸为128k,如不指定，区尺寸默认为64k 二、建立UNDO表空间 CREATE UNDO TABLESPACE UNDOTBS02 DATAFILE ‘/oracle/oradata/db/UNDOTBS02.dbf‘ SIZE 50M #注意：在OPEN状态下某些时刻只能用一个UNDO表空间，如果要用新建的表空间，必须切换到该表空间: ALTER SYSTEM SET undo_tablespace=UNDOTBS02; 三、建立临时表空间 CREATE TEMPORARY TABLESPACE temp_data TEMPFILE ‘/oracle/oradata/db/TEMP_DATA.dbf‘ SIZE 50M 四、改变表空间状态 1.使表空间脱机 ALTER TABLESPACE game OFFLINE; 如果是意外删除了数据文件，则必须带有RECOVER选项 ALTER TABLESPACE game OFFLINE FOR RECOVER; 2.使表空间联机 ALTER TABLESPACE game ONLINE; 3.使数据文件脱机 ALTER DATABASE DATAFILE 3 OFFLINE; 4.使数据文件联机 ALTER DATABASE DATAFILE 3 ONLINE; 5.使表空间只读 ALTER TABLESPACE game READ ONLY; 6.使表空间可读写 ALTER TABLESPACE game READ WRITE; 五、删除表空间 DROP TABLESPACE data01 INCLUDING CONTENTS AND DATAFILES; 六、扩展表空间 首先查看表空间的名字和所属文件 select tablespace_name, file_id, file_name, round(bytes/(1024*1024),0) total_space from dba_data_files order by tablespace_name; 1.增加数据文件 ALTER TABLESPACE game ADD DATAFILE ‘/oracle/oradata/db/GAME02.dbf‘ SIZE 1000M; 2.手动增加数据文件尺寸 ALTER DATABASE DATAFILE ‘/oracle/oradata/db/GAME.dbf‘ RESIZE 4000M; 3.删除表空间的一个数据文件 alter tablspace XXXX offline; alter database datafile '......' drop including datafile; alter tablespace xxx online; 4.设定数据文件自动扩展 ALTER DATABASE DATAFILE ‘/oracle/oradata/db/GAME.dbf AUTOEXTEND ON NEXT 100M MAXSIZE 10000M; 设定后查看表空间信息 SELECT A.TABLESPACE_NAME,A.BYTES TOTAL,B.BYTES USED, C.BYTES FREE, (B.BYTES*100)/A.BYTES "% USED",(C.BYTES*100)/A.BYTES "% FREE" FROM SYS.SM$TS_AVAIL A,SYS.SM$TS_USED B,SYS.SM$TS_FREE C WHERE A.TABLESPACE_NAME=B.TABLESPACE_NAME AND A.TABLESPACE_NAME=C.TABLESPACE_NAME; 查询表空间相关信息的 SQL: 1.查看表空间及文件大小（含undo表空间） set linesize 300 set pagesize 500 col file_name format a80 col TABLESPACE_NAME for a30 select tablespace_name,file_id,status,bytes/1024/1024 FileSizeM,file_name from dba_data_files order by tablespace_name; 2.查看表空间大小及利用率 set linesize 200 set pages 2000 col TABLESPACENAME for a30 select substr(a.TABLESPACE_NAME,1,15) TablespaceName, sum(a.bytes/1024/1024) as "Totle_size(M)", sum(nvl(b.free_space1/1024/1024,0)) as "Free_space(M)", sum(a.bytes/1024/1024)-sum(nvl(b.free_space1/1024/1024,0)) as "Used_space(M)", round((sum(a.bytes/1024/1024)-sum(nvl(b.free_space1/1024/1024,0))) *100/sum(a.bytes/1024/1024),2) as "Used_percent%" from dba_data_files a, (select sum(nvl(bytes,0)) free_space1,file_id from dba_free_space group by file_id) b where a.file_id = b.file_id(+) group by a.TABLESPACE_NAME order by "Used_percent%"; 3.查看临时表空间对应的文件名和大小 col file_name for a50 col TABLESPACE_NAME for a20 select FILE_NAME,TABLESPACE_NAME,BYTES,USER_BYTES from dba_temp_files; 4.查看临时表空间对应的文件名和大小 4-1 set lines 200 set pages 2000 SELECT D.TABLESPACE_NAME,SPACE "SUM_SPACE(M)",BLOCKS SUM_BLOCKS, USED_SPACE "USED_SPACE(M)",ROUND(NVL(USED_SPACE,0)/SPACE*100,2) "USED_RATE(%)", NVL(FREE_SPACE,0) "FREE_SPACE(M)" FROM (SELECT TABLESPACE_NAME,ROUND(SUM(BYTES)/(1024*1024),2) SPACE,SUM(BLOCKS) BLOCKS FROM DBA_TEMP_FILES GROUP BY TABLESPACE_NAME) D, (SELECT TABLESPACE_NAME,ROUND(SUM(BYTES_USED)/(1024*1024),2) USED_SPACE,ROUND(SUM(BYTES_FREE)/(1024*1024),2) FREE_SPACE FROM V$TEMP_SPACE_HEADER GROUP BY TABLESPACE_NAME) F WHERE D.TABLESPACE_NAME = F.TABLESPACE_NAME(+); 4-2 set lines 200 set pages 2000 select tablespace_name, file_id, bytes_used, bytes_free from v$temp_space_header ; 5.查看用户所使用的临时表空间 select username,default_tablespace,temporary_tablespace from dba_users; 6，system表空间扩充 alter database datafile'/opt/app/oracle/oradata/eomshn/system01.dbf'autoextend on; alter database datafile'/opt/app/oracle/oradata/eomshn/system01.dbf'resize 1024M;
