oracle中创建表空间，用户，授权，表结构的例子

-- 创建表空间
CREATE TABLESPACE blog
DATAFILE 'F:/oracledata/blog01.dbf' size 200M
EXTENT MANAGEMENT local;

-- 创建用户
CREATE USER blog IDENTIFIED BY blog
DEFAULT TABLESPACE blog;

-- 授予权限
GRANT connect, resource TO blog;

-- 使用blog用户连接数据库
CONNECT blog/blog;

-- 创建博客信息表
CREATE TABLE userinfo (
 id  VARCHAR2(32) NOT NULL,
 name  VARCHAR2(32) NOT NULL,
 password VARCHAR2(32) NOT NULL,
 CONSTRAINT userinfo_pk PRIMARY KEY (id),
 CONSTRAINT userinfo_unique_name UNIQUE ( name )
);

-- 创建网络日志表
CREATE TABLE message (
 id   VARCHAR2(32) NOT NULL,
 title   VARCHAR2(32) NOT NULL,
 content  VARCHAR2(2000),
 user_id  VARCHAR2(32),
 CONSTRAINT message_pk PRIMARY KEY (id),
 CONSTRAINT message_user FOREIGN KEY (user_id) REFERENCES userinfo(id)
);

-- 创建读者评论信息表
CREATE TABLE replymessage (
 id   VARCHAR2(32) NOT NULL,
 username VARCHAR2(64) NOT NULL,
 title  VARCHAR2(32) NOT NULL,
 content  VARCHAR2(2000),
 message_id VARCHAR2(32) NOT NULL,
 CONSTRAINT replymessage_pk PRIMARY KEY (id),
 CONSTRAINT replymessage_message FOREIGN KEY (message_id) REFERENCES message(id)
);