如何用nodejs操作MySql數據呢，其實寫法還是簡單的，

1.開始在你的node項目中 npm install mysql --save

2.在你的新建項目中 引入代碼

//引入數據庫
var mysql=require(‘mysql‘);

//實現本地鏈接
var connection = mysql.createConnection({
    host: ‘localhost‘,
    user: ‘yf‘,
    password: ‘123456‘,
    database: ‘yf‘
})

最好不好是用root 會產生沖突

3. 之後就是增刪改查啦，附上代碼

查詢

// 查找
function select() {
    connection.connect(function (err) {
        if (err) {
            console.error(‘error connecting:‘ + err.stack)
        }
        console.log(‘connected as id ‘ + connection.threadId);
    })

    connection.query(‘SELECT * FROM demo‘, function (error, results, fields) {
        
 
if (error) throw error;
        console.log(‘The solution is:‘, results);
    });
    connection.end();
}

添加

//添加
function add() {
    let post = {
        id: 1,
        name: ‘Hello MySql‘,
        age: 20,
        time: Date.now(),
        temp: ‘deom‘
    };
    let query = connection.query("INSERT INTO demo SET ?", post, function
 
 (error, results, fields) {
        if (error) throw error;
    })
    console.log(query.sql); //INSERT INTO posts ‘id‘=1, ‘title‘=‘Hello MySQL‘
}

修改

//修改
function updeate() {
    connection.connect(function (err) {
        if (err) {
            console.error(‘error connecting:‘ + err.stack);
        }
        console.log(‘connected as id ‘ + connection.threadId);
    });

    connection.query(‘UPDATE demo SET name=?where id?‘, [‘update‘, 1], function (error, results, fields) {
        if (error) throw error;
        console.log(‘changed:‘ + results.changeRows + ‘rows‘);
    });

    connection.end();

}

刪除

//刪除
function deletes() {
    connection.connect(function (err) {
        if (err) {
            console.error(‘error connecting:‘ + err.stack);
            return;
        }
        connection.query(‘DELETE FROM demo SET where id=?‘, [ 1], function (error, results, fields) {
            if (error) throw error;
            console.log(‘deleted:‘ + results.affectedRows + ‘rows‘);
        });
        console.log(‘connected as id ‘ + connection.threadId);
        connection.end();

    });

}

是不是很簡單啊 只要在你需要的地方添加方法名和對應的參數 ，就可以了

Nodejs操作MySQL數據庫