Nodejs连接mysql的增、删、改、查操作

一，创建数据库

Source Database       : my_news_test
SET 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 add
connection.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 up
connection.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 query
connection.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';
//ɾ
connection.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();