i以CMD运行Oracle 9i，不失中英文双语效果（cmd运行oracle9）
如何通过CMD运行Oracle 9i
How to Run Oracle 9i through CMD
Oracle 9i是一款强大的数据库管理系统，经常用于企业级应用程序的开发和部署。虽然Oracle 9i具有友好的图形用户界面，但使用命令行接口也是一种实用的方式。本文将介绍如何通过CMD运行Oracle 9i。
Oracle 9i is a powerful database management system that is often used for developing and deploying enterprise-level applications. While Oracle 9i has a user-friendly graphical interface, using the command-line interface is also a practical way. This article will introduce how to run Oracle 9i through CMD.
步骤1：设置环境变量
Step 1: Set Environment Variables
在CMD中运行Oracle 9i需要设置环境变量。首先需要创建一个ORACLE_HOME环境变量，该变量指向Oracle 9i安装目录。在CMD中输入以下命令：
Running Oracle 9i in CMD requires setting environment variables. First, create an ORACLE_HOME environment variable that points to the Oracle 9i installation directory. Enter the following command in CMD:
set ORACLE_HOME=C:\oracle\product\9.2.0
请根据自己的安装路径修改命令中的路径。
Please modify the path in the command according to your installation path.
接着，需要将Oracle 9i的可执行文件路径添加到PATH环境变量中。输入以下命令：
Then, add the path of the Oracle 9i executable file to the PATH environment variable. Enter the following command:
set PATH=%PATH%;%ORACLE_HOME%\bin
现在可以在CMD中运行Oracle 9i的命令了。
Now you can run Oracle 9i commands in CMD.
步骤2：连接数据库
Step 2: Connect to Database
要连接Oracle 9i数据库，可以使用SQL*Plus命令行工具。输入以下命令：
To connect to an Oracle 9i database, you can use the SQL*Plus command-line tool. Enter the following command:
sqlplus username/password@//hostname:port/service_name
其中，username和password是连接Oracle数据库的用户名和密码，hostname是Oracle服务器主机名，port是端口号，service_name是数据库服务名。
其中，username and password are the username and password used to connect to the Oracle database, hostname is the Oracle server hostname, port is the port number, and service_name is the database service name.
例如，连接本地数据库可以输入以下命令：
For example, to connect to a local database, enter the following command:
sqlplus system/oracle@//localhost:1521/orcl
这将连接到本地数据库的system用户（默认密码是oracle），端口号为1521，服务名为orcl。
This will connect to the system user of the local database (default password is oracle), with port number 1521 and service name orcl.
步骤3：执行SQL语句
Step 3: Execute SQL Statements
成功连接到数据库后，可以使用SQL语句进行操作。以下是一些SQL语句的例子：
After successfully connecting to the database, you can use SQL statements to perform operations. Here are some examples of SQL statements:
创建表：
Create a table:
CREATE TABLE employees (
id NUMBER(5), name VARCHAR2(50),
age NUMBER(3));
插入数据：
Insert data:
INSERT INTO employees (id, name, age) VALUES (1, 'John', 25);
查询数据：
Query data:
SELECT * FROM employees;
删除数据：
Delete data:
DELETE FROM employees WHERE name = 'John';
更新数据：
Update data:
UPDATE employees SET age = 28 WHERE name = 'John';
通过以上步骤，您已经学会了如何在CMD中运行Oracle 9i，以及如何在命令行界面下进行一些操作。在实际工作中，可以将这些操作封装成脚本并定时执行，以提高工作效率。
By following these steps, you have learned how to run Oracle 9i in CMD and how to perform some operations in the command-line interface. In practical work, these operations can be encapsulated into scripts and executed on a regular basis to improve work efficiency.
