Nodejs简单数据库操作

cnpm i mysql -D
cnpm i co-mysql -D

const mysql = require('mysql');
const co-mysql = require('co-mysql');

let conn = mysql.createPool({host:'localhost',user:'root',password:'root',database:'nodejs'});
let db = co(conn);//包装mysql 

db.query('select * from user',(err,data)=>{
    if(err){
        console.log('错误')
        console.log(err);
    }else{
        //返回数组加对象
        console.log('成功')
        console.log(data)
    }
});

let db = mysql.createPool({
 host:,usr:,passowrod:,database:
})