Executing SQL Queries

As a senior Java backend engineer with experience in MySQL, you are likely familiar with executing SQL queries. The same concept applies when working with databases in frontend development.

To execute SQL queries from a frontend application, you will need to use a database connectivity library or an Object-Relational Mapping (ORM) tool. These tools provide methods and abstractions for interacting with the database and executing SQL queries without writing raw SQL statements.

Here's an example of how you can execute an SQL query using a database connectivity library like MySQL in a JavaScript frontend application:

1// Replace with JavaScript code that demonstrates executing an SQL query
2const mysql = require('mysql');
3
4const connection = mysql.createConnection({
5  host: 'localhost',
6  user: 'root',
7  password: 'password',
8  database: 'mydatabase'
9});
10
11connection.connect((err) => {
12  if (err) throw err;
13  console.log('Connected to the database');
14
15  // Execute SQL query
16  connection.query('SELECT * FROM users', (error, results) => {
17    if (error) throw error;
18    console.log(results);
19  });
20});

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const mysql = require('mysql');

​

const connection = mysql.createConnection({

  host: 'localhost',

  user: 'root',

  password: 'password',

  database: 'mydatabase'

});

​

connection.connect((err) => {

  if (err) throw err;

  console.log('Connected to the database');

​

  // Execute SQL query

  connection.query('SELECT * FROM users', (error, results) => {

    if (error) throw error;

    console.log(results);

  });

});