node js crud with mysql intergration

Javascript_RESTAPI/index.js

@@ -0,0 +1,94 @@
+const express = require('express');
+const app = express();
+const PORT = 3000;
+
+const mysql = require('mysql2');
+
+const db = mysql.createConnection({
+    host: 'localhost',
+    user: 'root',     
+    password: '1234',   
+    database: 'testnode'      
+});
+
+db.connect(err => {
+    if (err) {
+        console.error('Error connecting to the database:', err.stack);
+        return;
+    }
+    console.log('Connected to MySQL database.');
+});
+
+
+app.use(express.json()); // Middleware to parse JSON bodies
+
+app.get('/', (req, res) => {
+    res.send('Hello, World!');
+});
+
+app.listen(PORT, () => {
+    console.log(`Server is running on http://localhost:${PORT}`);
+});
+
+// CREATE: POST /items
+app.post('/items', (req, res) => {
+  const { name } = req.body;
+  const query = 'INSERT INTO items (name) VALUES (?)';
+
+  db.query(query, [name], (err, results) => {
+      if (err) {
+          return res.status(500).json({ error: err.message });
+      }
+      res.status(201).json({ id: results.insertId, name });
+  });
+});
+
+// READ: GET /items
+app.get('/items', (req, res) => {
+  const query = 'SELECT * FROM items';
+  db.query(query, (err, results) => {
+      if (err) {
+          return res.status(500).json({ error: err.message });
+      }
+      res.json(results);
+  });
+});
+
+// READ (Single): GET /items/:id
+app.get('/items/:id', (req, res) => {
+  const query = 'SELECT * FROM items WHERE id = ?';
+  db.query(query, [req.params.id], (err, results) => {
+      if (err) {
+          return res.status(500).json({ error: err.message });
+      }
+      if (results.length === 0) return res.status(404).send('Item not found');
+      res.json(results[0]);
+  });
+});
+
+// UPDATE: PUT /items/:id
+app.put('/items/:id', (req, res) => {
+  const { name } = req.body;
+  const query = 'UPDATE items SET name = ? WHERE id = ?';
+
+  db.query(query, [name, req.params.id], (err, results) => {
+      if (err) {
+          return res.status(500).json({ error: err.message });
+      }
+      if (results.affectedRows === 0) return res.status(404).send('Item not found');
+      res.json({ id: req.params.id, name });
+  });
+});
+
+// DELETE: DELETE /items/:id
+app.delete('/items/:id', (req, res) => {
+  const query = 'DELETE FROM items WHERE id = ?';
+
+  db.query(query, [req.params.id], (err, results) => {
+      if (err) {
+          return res.status(500).json({ error: err.message });
+      }
+      if (results.affectedRows === 0) return res.status(404).send('Item not found');
+      res.status(204).send(); // No content to send back
+  });
+});