腾讯云数据库怎么登陆

『壹』 js如何连接和操作腾讯云mysql数据库

首先是登陆腾讯云，登陆之后可以领取新手礼包，如图

1.在实例上上新建一个为nodejs的数据库，然后新建一个为employee的表，新建四个字段 name sex age email除了年龄为int其它的全部为varchar格式
2.新建一个TimLiu的文件夹,打开cmd，cd TimLiu, 初始化项目npm init ,按照它的提示一步一步的操作即可，安装mysql模块，npm insitall mysql, 这个模块的作用主要是连接mysql数据库。
3.新建一个model.js 文件，

• var mysql = require(‘mysql’);


• var connection = mysql.createConnection({


• host:'',


• user:'root',


• password:'123abc',


• database:' nodejs',


• port:6445


• })


• connection.connect();



这里的host为我们在腾讯云上开通的外地址，端口号也是在外网地址里面，注意要把外网地址写分开，用户为默认的管理员用户，密码为我们在云平台上设置的密码，数据库为我们创建的nodejs数据库。
接下来我们对数据库进行增删改查操作

• /**


• * 增加员工


• */function addEmployee(){


• var employeeInsertSql = 'INSERT INTO employee(name,sex,age,email) VALUES(?,?,?,?)';


• var employeeInsertSql_Params = ['Tim','男',22,'[email protected]']


• connection.query(employeeInsertSql,employeeInsertSql_Params,function(err,result){


• if(err) console.log('[INSERT ERR]-',err.message);


• console.log(result);


• }) }addEmployee()


• }


• /**


• * 更新员工


• */


• function insertEmployee(){


• var employeeUpdateSql = "UPDATE employee SET name = ? WHERE age =?";


• var employeeUpdateSql_Params = ['Peter',22];


• connection.query(employeeUpdateSql,employeeUpdateSql_Params,function(err,result){


• if(err) console.log('[UPDATE ERR]-',err.message);


• console.log(result);


• })}




• insertEmployee();


• /**


• *查询员工


• */ function getEmployee(){


• var employeeGetSql = "SELECT * FROM employee";


• connection.query(employeeGetSql,function(err,result){


• if(err) console.log('[SELECT ERR]-',err.message);


• console.log(result);


• })}



getEmployee();

• /**


• *删除员工


• */ function deleteEmployee(){


• var employeeDeleteSql = "DELETE employee WHERE name = ?";


• var employeeDeleteSql_Params = 'Peter';


• connection.query(employeeDeleteSql,employeeDeleteSql_Params,function(err,result){


• if(err) console.log('[DELETE ERR]-',err.message);


• console.log(result);


• })


• }deleteEmployee();



这样我们就可以愉快的操作数据库了

如果大家想把项目更模块化操作，可在model下面新建一个employee_two.js,代码如下

• var mysql = require('mysql');var connection = mysql.createConnection({


• host:'',


• user:'root',


• password:'',


• database:'nodejs',


• port:})connection.connect();/**


• * 增加员工


• * @param {String} employee


• * @param {Function} callback


• */exports.addEmployee=function(employee,callback){


• var employeeInsertSql = 'INSERT INTO employee(name,sex,age,email) VALUES(?,?,?,?)';


• var employeeInsertSql_Params = [employee.name,employee.sex,employee.age,employee.email]


• connection.query(employeeInsertSql,employeeInsertSql_Params,callback)}/**


• * 更新员工


• * @param {String} employee


• * @param {Function} callback


• */exports.updateEmployee = function(name,age){


• var employeeUpdateSql = "UPDATE employee SET name = ? WHERE age =?";


• var employeeUpdateSql_Params = ['Peter',22];


• connection.query(employeeUpdateSql,employeeUpdateSql_Params,function(err,result){


• if(err) console.log('[UPDATE ERR]-',err.message);


• console.log(result);


• })}/**


• * 查询员工


• *


• */exports.getEmployee = function(){


• var employeeGetSql = "SELECT * FROM employee";


• connection.query(employeeGetSql,callback)}/**


• * 删除员工


• * @param {String} name


• */exports.deleteEmployee = function(name){


• var employeeDeleteSql = "DELETE employee WHERE name = ?";


• var employeeDeleteSql_Params = 'Peter';


• connection.query(employeeDeleteSql,employeeDeleteSql_Params,callback)


• }再在根目录下新建index.js,代码如下var db = require('./model/employee_two');//增加员工var employee = {


• name:'lisa',


• age:22,


• sex:"女",


• email:'99533212@qq.com'}db.addEmployee(employee,function(err,result){


• if(err) console.log("[INSERT err]-",err.message)


• console.log(result);})//删除员工db.deleteEmployee('Peter',function(err,result){


• if(err) console.log("[DELETE err]-",err.message)


• console.log(result);})//更新员工db.updateEmployee('Tim',23,function(err,result){


• if(err) console.log("[UPDATE err]-",err.message)


• console.log(result);})//查询员工db.getEmployee(function(err,result){


• if(err) console.log("[GET err]-",err.message)


• console.log(result);})