如何实现“mysql连接 多个参数”

流程图

flowchart TD
    A[新建数据库连接] --> B[设置连接参数]
    B --> C[连接数据库]
    C --> D[执行SQL操作]
    D --> E[关闭数据库连接]

步骤说明

步骤 操作 代码示例
1 新建数据库连接 const mysql = require('mysql');
2 设置连接参数 const connection = mysql.createConnection({ host: 'localhost', user: 'root', password: 'password', database: 'dbname' });
3 连接数据库 connection.connect((err) => { if (err) throw err; console.log('Connected to MySQL!'); });
4 执行SQL操作 connection.query('SELECT * FROM table', (err, results) => { if (err) throw err; console.log(results); });
5 关闭数据库连接 connection.end();

代码示例

```javascript
const mysql = require('mysql');

const connection = mysql.createConnection({
    host: 'localhost',
    user: 'root',
    password: 'password',
    database: 'dbname'
});

connection.connect((err) => {
    if (err) throw err;
    console.log('Connected to MySQL!');
});

connection.query('SELECT * FROM table', (err, results) => {
    if (err) throw err;
    console.log(results);
});

connection.end();

### 饼状图

```mermaid
pie
    title 数据库连接参数分布
    "host" : 30
    "user" : 25
    "password" : 20
    "database" : 25

通过以上步骤,你可以成功实现“mysql连接 多个参数”。祝你学习顺利!