Node.js操作mysql数据库之增删改查
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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:
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 ?\', 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();
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