Nodejs连接mysql的增、删、改、查操作

一，创建数据库

Source Database       : my_news_testSET FOREIGN_KEY_CHECKS=0; -- ------------------------------ Table structure for node_user-- ----------------------------DROP TABLE IF EXISTS `node_user`;CREATE TABLE `node_user` (  `id` int(11) NOT NULL AUTO_INCREMENT,  `name` varchar(30) DEFAULT NULL,  `age` int(8) DEFAULT NULL,  PRIMARY KEY (`id`)) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=utf8; -- ------------------------------ Records of node_user-- ----------------------------INSERT INTO `node_user` VALUES ('1', 'admin', '32');INSERT INTO `node_user` VALUES ('2', 'dans88', '45');INSERT INTO `node_user` VALUES ('3', '张三', '35');INSERT INTO `node_user` VALUES ('4', 'ABCDEF', '88');INSERT INTO `node_user` VALUES ('5', '李小二', '65');

二，连接

var connection = mysql.createConnection({  host     : '127.0.0.1',  user     : 'root',  password : 'root123',  port: '3306',  database: 'my_news_test',});

三，简单查询

注意要记得安装node_mysql,直接使用npm install mysql

//mysql.js//首先需要安装nodejs 的mysql包//npm install mysql//编写nodejs与mysql交互的代码 var mysql = require('mysql'); var TEST_DATABASE = 'my_news_test'; var TEST_TABLE = 'node_user'; //创建连接 var client = mysql.createConnection({   host:'127.0.0.1',   user: 'root',   password: 'root123',  database: 'my_news_test',});client.connect();client.query("use " + TEST_DATABASE);client.query(   'SELECT * FROM '+TEST_TABLE,   function selectCb(err, results, fields) {     if (err) {       throw err;     }        if(results)      {          for(var i = 0; i < results.length; i++)          {              console.log("%d\t%s\t%s", results[i].id, results[i].name, results[i].age);          }      }       client.end();   } );  

四、Node.js结合MySQL的增、删、改、查操作

1、增var mysql  = require('mysql'); var connection = mysql.createConnection({      host     : '127.0.0.1',        user     : 'root',               password : 'root123',        port: '3306',                    database: 'my_news_test',}); connection.connect(); var  userAddSql = 'INSERT INTO node_user(id,name,age) VALUES(0,?,?)';var  userAddSql_Params = ['Wilson', 55];//增 addconnection.query(userAddSql,userAddSql_Params,function (err, result) {        if(err){         console.log('[INSERT ERROR] - ',err.message);         return;        }              console.log('-------INSERT----------');       //console.log('INSERT ID:',result.insertId);              console.log('INSERT ID:',result);              console.log('#######################'); });connection.end();

2、改var mysql  = require('mysql');  var connection = mysql.createConnection({      host     : '127.0.0.1',        user     : 'root',               password : 'root123',        port: '3306',                    database: 'my_news_test',}); connection.connect(); var userModSql = 'UPDATE node_user SET name = ?,age = ? WHERE id = ?';var userModSql_Params = ['Hello World',99,7];//改 upconnection.query(userModSql,userModSql_Params,function (err, result) {   if(err){         console.log('[UPDATE ERROR] - ',err.message);         return;   }         console.log('----------UPDATE-------------');  console.log('UPDATE affectedRows',result.affectedRows);  console.log('******************************');}); connection.end();

3、查操作var mysql  = require('mysql');  var connection = mysql.createConnection({      host     : '127.0.0.1',        user     : 'root',               password : 'root123',        port: '3306',                    database: 'my_news_test',}); connection.connect(); var  userGetSql = 'SELECT * FROM node_user';//查 queryconnection.query(userGetSql,function (err, result) {        if(err){          console.log('[SELECT ERROR] - ',err.message);          return;        }               console.log('---------------SELECT----------------');       console.log(result);              console.log('&&&&&&&&&&&&&&&&&&&&&&&&&&&&&'); }); connection.end();

4、删除操作var mysql  = require('mysql');  var connection = mysql.createConnection({      host     : '127.0.0.1',        user     : 'root',               password : 'root123',        port: '3306',                    database: 'my_news_test',}); connection.connect(); var  userDelSql = 'DELETE FROM node_user WHERE id = 7';//ɾconnection.query(userDelSql,function (err, result) {        if(err){          console.log('[DELETE ERROR] - ',err.message);          return;        }               console.log('-------------DELETE--------------');       console.log('DELETE affectedRows',result.affectedRows);       console.log('&&&&&&&&&&&&&&&&&'); }); connection.end();