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Detailed introduction to the sample code sharing of nodejs operating mysql to implement addition, deletion, modification and query

黄舟
Release: 2017-05-28 10:33:39
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The following editor will bring you an example of nodejsoperationmysql to implement addition, deletion, modification and query. The editor thinks it’s pretty good, so I’ll share it with you now and give it as a reference. Let’s follow the editor and take a look.

First you need toinstallmysql module: npm install mysql --save

Then create the user data table:

#Then use nodejs to add, delete, modify and check the database:

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nodejs操作mysql实现增删改查 .
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首先需要安装mysql模块:npm install mysql --save

然后创建user数据表:




接着使用nodejs对数据库进行增删改查:


//引入mysql模块
var mysql = require('mysql');
//链接数据库
var connection = mysql.createConnection({
  host:'localhost',
  user:'root',
  password:'root',
  database:'node',
})
connection.connect();
//查询数据
var sql = 'SELECT * FROM user';
connection.query(sql,function (err,result) {
  if(err){
    console.log('error');
    return;
  }
  console.log('-----------------查询----------------');
  console.log(result);
  console.log('-----------------查询结束----------------');
})

//增加数据
var addsql = 'INSERT INTO user(name,age,sex) VALUES(?,?,?)';
var addsqlparams = ['汪丹萍','24','女'];
connection.query(addsql,addsqlparams,function (err,result) {
  if(err){
    console.log('error');
    return;
  }
  console.log('-----------------新增成功----------------');
  console.log(result);
  console.log('-----------------结束----------------');
})

//修改数据
var modsql = 'UPDATE user SET name = ?,age = ? WHERE id = ?';
var modsqlparams = ['吕雪源love','26','1'];
connection.query(modsql,modsqlparams,function (err,result) {
  if(err){
    console.log('err');
    return;
  }
  console.log('--------------------------------');
  console.log(result);
  console.log('--------------------------------');
})

//删除数据
var delsql = 'DELETE FROM user where id = 2';
connection.query(delsql,function (err,result) {
  if(err){
    console.log('err');
    return;
  }
  console.log('----------删除-------------');
  console.log(result);
})


connection.end();
Copy after login

Finally run js:

#All additions, deletions, modifications and checks have been executed successfully.

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