js如何连接和操作腾讯云mysql数据库

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
进入云产品->数据库->CDB for MYSQL->立即选购，选购最低配的可用礼包抵扣使用一个月，购买完成
主页->右上角产品管理->使用中的数据库,这时我们会看见一个实例，首先我们进入管理页面对实例进行一些基本的设置实例名可以随意更改，外网地址必须开启，否则我们就不能在自己的项目中和本地访问云数据库。进入账号管理页面修改自己的root密码，然后点击右上角的登录数据库
登陆完成之后如下图这个和本地客户端操作基本相同，我就不详细阐述了
二、使用一个demo来说明如何操作云mysql数据库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,'18818216454@163.com'] 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);})2018-06-13