npm install mysql 

var mysql=require('mysql');
var connection = mysql.createConnection({
host : '192.168.0.108',
user : 'root',
password : '123456',
database : 'test1',
port:'3306'
});
connection.connect();

var usr={name:'zhangsan',password:'pwdzhangsan',mail:'zhangsan@gmail.com'};
connection.query('insert into users set "htmlcode">

connection.query('update users set password="ddd" where name="zhangsan"', {password:'ppp'}, function(err, result) {
if (err) throw err;
console.log('updated zhangsan\'s password to ddd');
console.log(result);
console.log('\n');
}); 


删除一个user，带条件


connection.query('delete from users where name="zhangsan"', {password:'ppp'}, function(err, result) {
if (err) throw err;
console.log('deleted zhangsan');
console.log(result);
console.log('\n');
});


查询user，所有


connection.query('select * from users', function(err, rows, fields) {
if (err) throw err;
console.log('selected after deleted');
for(var i= 0,usr;usr=rows[i++];){
console.log('user nae='+usr.name + ', password='+usr.password);
}
console.log('\n');
}); 


关闭数据库连接
connection.end(); 


基本的CRUD完成
mysql模块的完整功能说明参见官方：


https://www.npmjs.com/package/mysql


https://github.com/felixge/node-mysql


全部demo代码


var mysql=require('mysql');
var connection = mysql.createConnection({
host : '192.168.0.108',
user : 'root',
password : '123456',
database : 'test1',
port:'3306'
});
connection.connect();
var usr={name:'zhangsan',password:'pwdzhangsan',mail:'zhangsan@gmail.com'};
connection.query('insert into users set "ddd" where name="zhangsan"', {password:'ppp'}, function(err, result) {
if (err) throw err;
console.log('updated zhangsan\'s password to ddd');
console.log(result);
console.log('\n');
});
connection.query('select * from users', function(err, rows, fields) {
if (err) throw err;
console.log('selected after updated');
for(var i= 0,usr;usr=rows[i++];){
console.log('user nae='+usr.name + ', password='+usr.password);
}
console.log('\n');
});
connection.query('delete from users where name="zhangsan"', {password:'ppp'}, function(err, result) {
if (err) throw err;
console.log('deleted zhangsan');
console.log(result);
console.log('\n');
});
connection.query('select * from users', function(err, rows, fields) {
if (err) throw err;
console.log('selected after deleted');
for(var i= 0,usr;usr=rows[i++];){
console.log('user nae='+usr.name + ', password='+usr.password);
}
console.log('\n');
});
connection.end();