导读:1建站知识本文将介绍Oracle 表空间查询与操作方法，需要了解跟多的朋友可以参考下网seo优化趋势网站seo优化培训。

一。查询篇 1.查询oracle表空间的使用情况 select b.file_id　　文件ID, 　　b.tablespace_name　　表空间, 　　b.file_name　　　　　物理文件名, 　　b.bytes　　　　　　　总字节数, 　　(b.bytes-sum(nvl(a.bytes,0)))　　　已使用, 　　sum(nvl(a.bytes,0))　　　　　　　　剩余, 　　sum(nvl(a.bytes,0))/(b.bytes)*100　剩余百分比 　　from dba_free_space a,dba_data_files b 　　where a.file_id=b.file_id 　　group by b.tablespace_name,b.file_name,b.file_id,b.bytes 　　order by b.tablespace_name 2.查询oracle系统用户的默认表空间和临时表空间 select default_tablespace,temporary_tablespace from dba_users 3.查询单张表的使用情况 select segment_name,bytes from dba_segments where segment_name = 'RE_STDEVT_FACT_DAY' and owner = USER RE_STDEVT_FACT_DAY是您要查询的表名称 4.查询所有用户表使用大小的前三十名 select * from (select segment_name,bytes from dba_segments where owner = USER order by bytes desc ) where rownum <= 30 5.查询当前用户默认表空间的使用情况 select tablespacename,sum(totalContent),sum(usecontent),sum(sparecontent),avg(sparepercent) from ( SELECT b.file_id as id,b.tablespace_name as tablespacename,b.bytes as totalContent,(b.bytes-sum(nvl(a.bytes,0))) as usecontent,sum(nvl(a.bytes,0)) as sparecontent,sum(nvl(a.bytes,0))/(b.bytes)*100 as sparepercent FROM dba_free_space a,dba_data_files b WHERE a.file_id=b.file_id and b.tablespace_name = (select default_tablespace from dba_users where username = user) group by b.tablespace_name,b.file_name,b.file_id,b.bytes ) GROUP BY tablespacename 6.查询用户表空间的表 select * from user_tables ================================================================================== 一、建立表空间 CREATE TABLESPACE test DATAFILE 'c:/oracle/oradata/db/test01.dbf' SIZE 50M UNIFORM SIZE 1M; #指定区尺寸为128k,如不指定，区尺寸默认为64k 或 CREATE TABLESPACE test DATAFILE 'c:/oracle/oradata/db/test01.dbf' SIZE 50M MINIMUM EXTENT 50K EXTENT MANAGEMENT LOCAL DEFAULT STORAGE (INITIAL 50K NEXT 50K MAXEXTENTS 100 PCTINCREASE 0); 可从dba_tablespaces中查看刚创建的表空间的信息 二、建立UNDO表空间 CREATE UNDO TABLESPACE test_undo DATAFILE 'c:/oracle/oradata/db/test_undo.dbf' SIZE 50M UNDO表空间的EXTENT是由本地管理的，而且在创建时的SQL语句中只能使用DATAFILE和EXTENT MANAGEMENT子句。 ORACLE规定在任何时刻只能将一个还原表空间赋予数据库，即在一个实例中可以有多个还原表空间存在，但只能有一个为活动的。可以使用ALTER SYSTEM命令进行还原表空间的切换。 SQL> ALTER SYSTEM SET UNDO_TABLESPACE = test_undo; 三、建立临时表空间 CREATE TEMPORARY TABLESPACE test_temp TEMPFILE '/oracle/oradata/db/test_temp.dbf' SIZE 50M 查看系统当前默认的临时表空间 select * from dba_properties where property_name like 'DEFAULT%' 改变系统默认临时表空间 alter database default temporary tablespace test_temp; 四、改变表空间状态 1.使表空间脱机 ALTER TABLESPACE test OFFLINE; 如果是意外删除了数据文件，则必须带有RECOVER选项 ALTER TABLESPACE game test FOR RECOVER; 2.使表空间联机 ALTER TABLESPACE test 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 test READ ONLY; 6.使表空间可读写 ALTER TABLESPACE test READ WRITE; 五、删除表空间 DROP TABLESPACE test INCL ING CONTENTS AND DATAFILES CASCADE CONSTRAINTS; DROP TABLESPACE　表空间名 [INCL ING CONTENTS [AND DATAFILES] [CASCADE CONSTRAINTS]] 1. INCL 个业网站建设公司ING CONTENTS　子句用来删除段 2. AND DATAFILES　子句用来删除数据文件 3. CASCADE CONSTRAINTS　子句用来删除所有的引用完整性约束 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 test ADD DATAFILE '/oracle/oradata/db/test02.dbf' SIZE 1000M; 2.手动增加数据文件尺寸 ALTER DATABASE DATAFILE 'c:/oracle/oradata/db/test01.dbf' RESIZE 100M; 3.设定数据文件自动扩展 ALTER DATABASE DATAFILE 'c:/oracle/oradata/db/test01.dbf' AUTOEXTEND ON NEXT 100M MAXSIZE 200M; 设定后可从dba_tablespace中查看表空间信息，从v$datafile中查看对应的数据文件信息 ================================================================================== create tablespace scgl datafile 'E:\ORACLE\PROD T\10.1.0\ORADATA\ORCL\scgl2.dbf' size 50m autoextend on next 50m maxsizseo网站优化培训e 20480m extent management local; create tablespace test_data logging datafile 'E:\ORACLE\PROD T\10.1.0\ORADATA\ORCL\user_data.dbf' size 50m autoextend on next 50m maxsize 20480m extent managseo网站优化ement local; create user scgl identified by qwer1234 default tablespace scgl temporary tablespace scgl_temp; tempfile 'E:\ORACLE\PROD T\10.1.0\ORADATA\ORCL\user_temp.dbf' create temporary tablespace scgl_temp tempfile 'E:\ORACLE\PROD T\10.1.0\ORADATA\ORCL\scgl_temp.dbf' size 50m autoextend on next 50m maxsize 20480m extent management local; grant connect,resource, dba to scgl; oracle创建表空间 SYS用户在CMD下以DBA身份登陆： 在CMD中打sqlplus /nolog 然后再 conn / as sysdba //创建临时表空间 create temporary tablespace user_temp tempfile 'D:\oracle\oradata\Oracle9i\user_temp.dbf' size 50m autoextend on next 50m maxsize 20480m extent management local; //创建数据表空间 create tablespace test_data logging datafile 'D:\oracle\oradata\Oracle9i\user_data.dbf' size 50m autoextend on next 50m maxsize 20480m extent management local; //创建用户并指定表空间 create user username identified by password default tablespace user_data temporary tablespace user_temp; 查询表空间使用情况 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_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 1 查询表空间的free space 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; --查询表空间的总容量 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; ----------------------------------------------------------------------------------------------------------------------------- 1.建立表空间:create tablespace test datafile '/u01/test.dbf' size 10M uniform size 128k #指定区尺寸为128k ,块大小为默认8K #大文件表空间 create bigfile tablespace big_tbs datafile '/u01/big_tbs.dbf ' size 100G 2.建非标准表show parameter db alter system set db_2k_cache_size=10M create tablespace test datafile '/u01/test.dbf' size 10M blocksize 2K uniform size 128k #常见错误 SQL> alter system set db_2k_cache_size=2M; alter system set db_2k_cache_size=2M ERROR at line 1: ORA-02097: parameter cannot be modified because specified value is invalid ORA-00384: Insufficient memory to grow cache #解决 SQL> alter system set sga_max_size=400M scope=spfile; SQL> shutdown immediate; SQL> startup SQL> alter system set db_2k_cache_size=10M; System altered. 3.查看区大小与块大小#区大小 conn y / 123 create table t(i number) tablespace test; Insert into t values(10) select bytes/1024 from user_segments where segment_name=upper('t'); #块大小 Show parameter block(默认64K) #非标准表空间的blocksize SQL> select * from v$dbfile; SQL> select name,block_size,status from v$datafile; SQL> select block_size from v$datafile where file#=14; 4.删除表空间drop tablespace test including contents and datafiles 5.查表空间:#查数据文件 select * from v$dbfile; #所有表空间 select * from v$tablespace; #表空间的数据文件 select file_name,tablespace_name from dba_data_files; 6.建立undo表空间create undo tablespace undotbs01 datafile '/u01/undotbs01.dbf' size 5M; #切换到新建的undo表空间 alter system set undo_tablespace=undotbs01; 7.建立临时表空间create temporary tablespace temp_data tempfile '/u01/temp.db' size 5M; create bigfile temporary tablespace bigtem tempfile '/u01/bigtemp.db' size 5M; 8.改变表空间状态 (0.)查看状态 #表空间状态 select tablespace_name,block_size,status from dba_tablespaces; #数据文件状态 select name,block_size,status from v$datafile; (1.)表空间脱机alter tablespace test offline #如果意外删除了数据文件 alter tablespace test offline for recover (2.)表空间联机alter tablespace test online (3.)数据文件脱机select * from v$dbfile; alter database datafile 3 offline (4.)数据文件联机recover datafile 3; alter database datafile 3 online; (5.)使表空间只读alter tablespace test read only (6.)使表空间可读写alter tablespace test read write; 9.扩展表空间#首先查看表空间的名字和所属文件及空间 select tablespace_name, file_id, file_name,round(bytes/(1024*1024),0) total_space from dba_data_files order by tablespace_name; #三种扩展方法 1.alter tablespace test add datafile '/u01/test02.dbf' size 10M(自动加一个datafile) 2.alter database datafile '/u01/test.dbf' resize 20M; 3.alter database datafile '/u01/test.dbf' autoextend on next 10M maxsize 1G; #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$ts_free c where a.tablespace_name=b.tablespace_name and a.tablespace_name=c.tablespace_name; 10.移动表空间的数据文件 #先确定数据文件据在表空间 SQL>select tablespace_name,file_name from dba_data_files where file_name='/u01/test.dbf'; #open状态 SQL>alter tablespace test offline; SQL>host move /u01/test.dbf /u01/oracle/test.dbf; SQL>alter tablespace test rename datafile '/u01/test.dbf' to '/u01/oracle/test.dbf'; SQL>alter tablespace test offline; #mount状态 SQL>shutdown immediate; SQL>startup mount SQL>host move /u01/test.dbf /u01/oracle/test.dbf; SQL>alter database rename file '/u01/test.dbf' to '/u01/oracle/test.dbf'; 11.表空间和数据文件常用的数据字典与动态性能视图v$dbfile v$datafile dba_segments user_segments dba_data_files v$tablespace dba_tablespaces user_tablespaces --查询表空间使用情况 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_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 1 --查询表空间的free space 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; --查询表空间的总容量 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; //给用户授予权限 grant connect,resource to username; //以后以该用户登录，创建的任何数据库对象都属于user_temp 和user_data表空间， 这就不用在每创建一个对象给其指定表空间了 撤权： revoke 权限... from 用户名; 删除用户命令 drop user user_name cascade; 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 INCL ING 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 INCL ING 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.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相关网seo优化趋势网站seo优化培训。

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