下面是MongoDB的基本增刪改查代碼示例:
const MongoClient = require(‘mongodb’).MongoClient;
const url = ‘mongodb://localhost:27017’;
const dbName = ‘mydatabase’;
MongoClient.connect(url, function(err, client) {
if (err) throw err;
const db = client.db(dbName);
// 在這里執行你的增刪改查操作
client.close();
});
const collection = db.collection(‘mycollection’);
const data = { name: ‘John’, age: 30 };
collection.insertOne(data, function(err, result) {
if (err) throw err;
console.log(‘插入成功’);
});
const collection = db.collection(‘mycollection’);
const query = { name: ‘John’ };
collection.find(query).toArray(function(err, result) {
if (err) throw err;
console.log(‘查詢結果:’, result);
});
const collection = db.collection(‘mycollection’);
const query = { name: ‘John’ };
const update = { $set: { age: 31 } };
collection.updateOne(query, update, function(err, result) {
if (err) throw err;
console.log(‘更新成功’);
});
const collection = db.collection(‘mycollection’);
const query = { name: ‘John’ };
collection.deleteOne(query, function(err, result) {
if (err) throw err;
console.log(‘刪除成功’);
});
請注意,在實際使用中,你需要根據你的數據庫和集合名稱進行相應的調整。此外,還有許多其他操作和選項可用,你可以參考MongoDB的官方文檔以獲取更多詳細信息。