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!