// 引入 MySQL 模块constmysql=require('mysql');// 创建连接constconnection=mysql.createConnection({host:'localhost',user:'root',password:'password',database:'my_database'});// 连接数据库connection.connect(function(err){if(err){console.error('Error connecting to database: '+err.stack);return;...
然后,我们可以使用connection.connect()方法来连接数据库: connection.connect(function(err){if(err){console.error('Error connecting to database: '+err.stack);return;}console.log('Connected to database as id '+connection.threadId);}); 1. 2. 3. 4. 5. 6. 7. 在成功连接到数据库后,我们就可...
window.indexedDB是一个IDBFactory对象,调用对象open方法返回的是一个IDBOpenDBRequest请求,监听success事件,e.target.result指向一个名为IDBDatabase的对象,该对象就是连接到数据库的唯一 API。需要注意的是IDBDatabase对象有 close、createObjectStore、deleteObjectStore、transaction 方法和 name、version 等常用属性: 下面...
1.0-SNAPSHOT (build 11761) www.orientechnologies.com Type 'help' to display all the commands supported. Connecting to database [remote:localhost/demo] with user 'admin'...OK ---+---+---+---+---+--- #| RID |name |password |status |roles ---+---+---+---+---+-...
console.error("Error connecting to Oracle Database", err); }); 请替换yourusername、yourpassword和yourconnectionstring为您的实际数据库信息。 使用连接池 为了更高效地管理数据库连接,建议使用连接池,以下是如何创建一个连接池并使用它来连接到数据库的示例: ...
connection=mysql.createConnection({host:process.env.DB_HOST,user:process.env.DB_USER,password:process.env.DB_PASS});// Connect to the databaseconnection.connect((err)=>{if(err){console.error('Error connecting to the database: '+err.stack);return;}console.log('Connected to the database!'...
on('connect', (err) => { if (err) { console.log('error connecting', err); } else { console.log('connection successful'); } }); 但是,使用应该是等效的 Sequelize 代码,我收到连接超时错误。 const Sequelize = require('sequelize'); const sequelize = new Sequelize('[DBNAME]', '[USER...
error('Error connecting to Access database:', err); return; } const query = 'SELECT * FROM your_table_name'; connection.query(query, (err, results) => { if (err) { console.error('Error executing query:', err); return; } console.log('Results:', results); }); }); 请确保将...
connect(cfg); // now connected to custom Database Connecting to another database By default, the Instant.connect() method will assign your initial database connection the alias "main". You can access your Database object directly via: const db = Instant.database(); const mainDb = Instant...
Link the back end, front end, and database using environment variables Start by connecting the back-end service to the database. Run the following command to update the environment variables for the back-endurlshortener-backservice:...