Oracle表空间常用操作
1. 查看Oracle创建过哪些用户
>select username from all_users;
2. 查看Oracle创建过哪些表空间,表空间的名字和大小
>select t.tablespace_name, round(sum(bytes/(1024*1024)),0) ts_size
from dba_tablespaces t, dba_data_files d
where t.tablespace_name = d.tablespace_name
group by t.tablespace_name;
3. 查看表空间物理文件的名称及大小
>select tablespace_name,file_id,file_name,round(bytes/(1024*1024),0)
total_space from dba_data_files order by tablespace_name;
4. 查看表空间的使用情况
>select sum(bytes)/(1024*1024) as free_space,tablespace_name
from dba_free_space
group by tablespace_name;
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$TS_FREE C
WHERE A.TABLESPACE_NAME=B.TABLESPACE_NAME AND
A.TABLESPACE_NAME=C.TABLESPACE_NAME;
5. 增加表空间的的大小
A. >alter tablespace SYSAUX add datafile
'/opt/oracle/oradata/testdb/sysaux02.dbf' size 100M autoextend on;
B. >alter tablespace SYSAUX add datafile
'/opt/oracle/oradata/testdb/sysaux02.dbf' size 100M;
C. >alter database datafile '/opt/oracle/oradata/testdb/sysaux02.dbf'
resize 1000M;
6. 查看Oracle RAC上剩余的表空间
#export ORACLE_SID=+ASM1
#sqlplus / as sysdba
#select NAME,TOTAL_MB,FREE_MB from V$ASM_DISKGROUP;
&nb
相关文档:
建立ssh信任,rac的安装要用ssh和scp来拷贝安装文件。
在所有的节点上运行:
mkdir ~/.ssh
chmod 700 ~/.ssh
ssh-keygen -t rsa
ssh-keygen -t dsa
在rdb1节点上执行:
ssh rdb1 cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
ssh rdb1 cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys
ssh rdb2 ......
1. 创建普通用户
>create user username identified by username;
>grant create tablespace, resource ,connect to username;
2. 创建表空间和用户
2.1 创建临时表空间
>create temporary tablespace DB_TEMP
tempfile '/opt/oracle/oradata/mydb/t ......
一个使用ibatis对数据库增删改查的例子:
这里用的开发环境是:Eclipse3.2+mysql5.0.20,ibatis包是ibatis-common-2.jar,
ibatis-dao-2.jar,ibatis-sqlmap-2.jar,mysql包是mysql-connector-java-5.0.3-bin.jar.
步骤:
1.创建数据库:
create database itcast;
use itcast;
创建表:
create table stu ......
虽然这是我找到最详细的配置描述,但是尝试还是没有成功。
1.下载Oracle Client Package
.
从
http://www.oracle.com/technology/software/tech/oci/instantclient/htdocs/winsoft.html
下载
Instant
Client Package – Basic
包
(
标注
:All files
required to run OCI, OCCI, and JDBC-OC ......
虽然这是我找到最详细的配置描述,但是尝试还是没有成功。
1.下载Oracle Client Package
.
从
http://www.oracle.com/technology/software/tech/oci/instantclient/htdocs/winsoft.html
下载
Instant
Client Package – Basic
包
(
标注
:All files
required to run OCI, OCCI, and JDBC-OC ......