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HomeDatabaseMysql TutorialOracle创建命名空间和新用户

Oracle安装完后,其中有一个缺省的数据库,除了这个缺省的数据库外,我们还可以创建自己的数据库。为了避免麻烦,可以用rsquo;D

Oracle安装完后,其中有一个缺省的数据库,除了这个缺省的数据库外,我们还可以创建自己的数据库。

为了避免麻烦,可以用’Database Configuration Assistant’向导来创建数据库(这步一定要创建好,因为这里没有做好,会在创建表空间时出错—我就在这里花了几个小时,晕)。

创建完数据库后,并不能立即在数据库中建表,必须先创建该数据库的用户,并且为该用户指定表空间。

下面是创建数据库用户的具体过程:

1.假如现在已经建好名为’test’的数据库,此时在d:\oracle\oradata\目录下已经存在test目录(注意:我的Oracle11g安装在d:\oracle下,若你的Oracle安装在别的目录,那么你新建的数据库目录就在*\oradata\目录下)。

2.在创建用户之前,先要创建表空间:

其格式为:格式: create tablespace 表间名 datafile ‘数据文件名’ size 表空间大小;

如:   SQL> create tablespace test_tablespace datafile ‘d:\oracle\oradata\test\test.dbf’ size 100M;

其中’test_tablespace’是你自定义的表空间名称,可以任意取名;

‘d:\oracle\oradata\test\test.dbf’是数据文件的存放位置,’test.dbf’文件名也是任意取;

‘size 100M’是指定该数据文件的大小,也就是表空间的大小。

删除命名空间

 DROP TABLESPACE test INCLUDING CONTENTS AND DATAFILES CASCADE CONSTRAINTS;

3.现在建好了名为’test_tablespace’的表空间,下面就可以创建用户了:

其格式为:格式: create user 用户 名 identified by 密码 default tablespace 表空间表;

如:   SQL> create user testone identified by testone default tablespace test_tablespace;

默认表空间’default tablespace’使用上面创建的表空间。

4.接着授权给新建的用户:

SQL> grant connect,resource to testone; –表示把 connect,resource权限授予testone用户

SQL> grant dba to testone; –表示把 dba权限授予给testone用户   授权成功。

ok! 数据库用户创建完成,现在你就可以使用该用户创建数据表了!

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