如何用nodejs操作MySql数据呢,其实写法还是简单的,
1.开始在你的node项目中 npm install mysql --save
2.在你的新建项目中 引入代码
//引入数据库 var mysql=require(‘mysql‘); //实现本地链接 var connection = mysql.createConnection({ host: ‘localhost‘, user: ‘yf‘, password: ‘123456‘, database: ‘yf‘ })
最好不好是用root 会产生冲突
3. 之后就是增删改查啦,附上代码
查询
// 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(); }
删除
//删除 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(); }); }
是不是很简单啊 只要在你需要的地方添加方法名和对应的参数 ,就可以了
原文地址:https://www.cnblogs.com/yf-html/p/8733837.html
时间: 2024-11-10 13:30:16