node.js 开发指南 – Node.js 连接 MySQL 并进行数据库操作

$ npm install mysql 

CREATE TABLE `NodeSample`.`MyTable` ( 
`id` INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY , 
`firstname` VARCHAR( 20 ) NOT NULL , 
`lastname` VARCHAR( 20 ) NOT NULL , 
`message` TEXT NOT NULL 
) ENGINE = MYISAM ; 

var sys = require('sys'); 
 
var Client = require('mysql').Client; 
var client = new Client(); 
 
client.user = 'someuser'; 
client.password = 'password'; 
 
client.connect(function(error, results) { 
if(error) { 
console.log('Connection Error: ' + error.message); 
return; 
} 
console.log('Connected to MySQL'); 
}); 

ClientConnectionReady = function(client) 
{ 
client.query('USE NodeSample', function(error, results) { 
if(error) { 
console.log('ClientConnectionReady Error: ' + error.message); 
client.end(); 
return; 
} 
}); 
}; 

var sys = require('sys'); 
 
var Client = require('mysql').Client; 
var client = new Client(); 
 
client.user = 'someuser'; 
client.password = 'password'; 
 
console.log('Connecting to MySQL...'); 
 
client.connect(function(error, results) { 
if(error) { 
console.log('Connection Error: ' + error.message); 
return; 
} 
console.log('Connected to MySQL'); 
ClientConnectionReady(client); 
}); 
 
ClientConnectionReady = function(client) 
{ 
client.query('USE NodeSample', function(error, results) { 
if(error) { 
console.log('ClientConnectionReady Error: ' + error.message); 
client.end(); 
return; 
} 
ClientReady(client); 
}); 
}; 
 
ClientReady = function(client) 
{ 
var values = ['Chad', 'Lung', 'Hello World']; 
client.query('INSERT INTO MyTable SET firstname = ?, lastname = ? , message = ?', values, 
function(error, results) { 
if(error) { 
console.log("ClientReady Error: " + error.message); 
client.end(); 
return; 
} 
console.log('Inserted: ' + results.affectedRows + ' row.'); 
console.log('Id inserted: ' + results.insertId); 
} 
); 
GetData(client); 
} 
 
GetData = function(client) 
{ 
client.query( 
'SELECT * FROM MyTable', 
function selectCb(error, results, fields) { 
if (error) { 
console.log('GetData Error: ' + error.message); 
client.end(); 
return; 
} 
// Uncomment these if you want lots of feedback 
//console.log('Results:'); 
//console.log(results); 
//console.log('Field metadata:'); 
//console.log(fields); 
//console.log(sys.inspect(results)); 
 
if(results.length > 0) 
{ 
var firstResult = results[0]; 
console.log('First Name: ' + firstResult['firstname']); 
console.log('Last Name: ' + firstResult['lastname']); 
console.log('Message: ' + firstResult['message']); 
} 
}); 
 
client.end(); 
console.log('Connection closed'); 
};