Node.js操作mysql数据库增删改查
编程学习 2021-07-04 21:04www.dzhlxh.cn编程入门
这篇文章主要介绍使用Node.js操作mysql数据库增删改查的相关资料,需要的朋友可以参考下
关于node.js操作mysql数据库的相关介绍请阅读全文吧。下文介绍的非常详细，具体内容如下所示：
安装mysql模块
npm install mysql
数据库准备
mysql server所在的机器IP地址是192.168.0.108，登录账户就用root@123456
在mysql中创建test数据库
在test数据库中创建一张users表
操作
连接数据库
var mysql=require('mysql');
var connection = mysql.createConnection({
host : '192.168.0.108',
user : 'root',
password : '123456',
database : 'test1',
port:'3306'
});
connection.connect();
插入一个user
var usr={name:'zhangsan',password:'pwdzhangsan',mail:'zhangsan@gmail.com'};
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，带条件
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');
});
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：
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 ?', 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();