标签：function mys OLE name data str npm 添加 delete
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
标签：function mys OLE name data str npm 添加 delete
原文地址：https://www.cnblogs.com/sexintercourse/p/11669029.html
