node.js与mysql数据库的交互

var mysql  = require(‘mysql‘);  //导入mysql包模块
 
var connection = mysql.createConnection({     
  host     : ‘localhost‘,       
  user     : ‘root‘,              
  password : ‘123456‘,       
  port: ‘3306‘,                   
  database: ‘reji‘ 
}); 
 
//创建一个connection
connection.connect(function(err){

    if(err){       

        console.log(‘[query] - :‘+err);

        return;

    }

    console.log(‘[connection connect]  succeed!‘);

});


 
var  sql = ‘SELECT * FROM start_levels‘;
//查
connection.query(sql,function (err, result) {
        if(err){
          console.log(‘[SELECT ERROR] - ‘,err.message);
          return;
        }
 
       console.log(‘--------------------------SELECT----------------------------‘);
       console.log(result);
       console.log(‘------------------------------------------------------------\n\n‘);  
});
 
//关闭connection
connection.end(function(err){

    if(err){       

        return;

    }

    console.log(‘[connection end] succeed!‘);

});