node.js操作mysql數據庫之增刪改查

安裝mysql模塊

npm install mysql

 

數據庫准備

mysql server所在的機器IP地址是192.168.0.108，登錄賬戶就用root@123456

在mysql中創建test數據庫

在test數據庫中創建一張users表

 

操作

連接數據庫

var mysql=require('mysql');

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

connection.connect();

 

插入一個user

var usr={name:'zhangsan',password:'pwdzhangsan',mail:'[e-mail]'};
connection.query('insert into users set ?', usr, function(err, result) {
    if (err) throw err;

    console.log('inserted zhangsan');
    console.log(result);
    console.log('\n');
});

 

更新user，帶條件

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');
});

 

刪除一個user，帶條件

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');
});

 

查詢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');

});

 

關閉數據庫連接

connection.end();

 

基本的CRUD完成

mysql模塊的完整功能說明參見官方：

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

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

 

全部demo代碼

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:'[e-mail]'};
connection.query('insert into users set ?', usr, function(err, result) {
    if (err) throw err;

    console.log('inserted zhangsan');
    console.log(result);
    console.log('\n');
});

connection.query('select * from users', function(err, rows, fields) {
    if (err) throw err;

    console.log('selected after inserted');
    for(var i= 0,usr;usr=rows[i++];){
        console.log('user nae='+usr.name + ', password='+usr.password);
    }

    console.log('\n');
});

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');
});

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();