Mariadb JavaScript

Introduction

Mariadb is an open-source relational database management system that is widely used for web applications. It is a fork of the MySQL database system, with additional features and improvements. JavaScript is a programming language commonly used for client-side web development. In this article, we will explore the use of Mariadb with JavaScript, including how to connect to a Mariadb database, perform CRUD operations, and handle errors.

Connecting to Mariadb Database

The first step in working with Mariadb and JavaScript is to establish a connection to the database. This requires a driver that can interact with the database system. There are several Mariadb drivers available for JavaScript, including mariadb, mysql2, and sequelize. The following code snippets demonstrate how to establish a connection using the mariadb driver:

const mariadb = require('mariadb');
const pool = mariadb.createPool({
    host: 'hostname',
    user: 'username',
    password: 'password',
    database: 'database_name'
});

````javascript
const mariadb = require('mariadb');
const pool = mariadb.createPool({
    host: 'hostname',
    user: 'username',
    password: 'password',
    database: 'database_name'
});

## Performing CRUD Operations

Once the connection to the Mariadb database is established, we can perform CRUD (Create, Read, Update, Delete) operations on the data. The examples below show how to execute various SQL queries using the mariadb driver:

### Select Query

```javascript
pool.query('SELECT * FROM users')
    .then(rows => {
        console.log(rows);
    })
    .catch(err => {
        console.error(err);
    });

```javascript
pool.query('SELECT * FROM users')
    .then(rows => {
        console.log(rows);
    })
    .catch(err => {
        console.error(err);
    });

### Insert Query

```javascript
pool.query('INSERT INTO users (name, email) VALUES (?, ?)', ['John Doe', 'john@doe.com'])
    .then(res => {
        console.log(res);
    })
    .catch(err => {
        console.error(err);
    });

```javascript
pool.query('INSERT INTO users (name, email) VALUES (?, ?)', ['John Doe', 'john@doe.com'])
    .then(res => {
        console.log(res);
    })
    .catch(err => {
        console.error(err);
    });

### Update Query

```javascript
pool.query('UPDATE users SET email = ? WHERE name = ?', ['jane@doe.com', 'Jane Doe'])
    .then(res => {
        console.log(res);
    })
    .catch(err => {
        console.error(err);
    });

```javascript
pool.query('UPDATE users SET email = ? WHERE name = ?', ['jane@doe.com', 'Jane Doe'])
    .then(res => {
        console.log(res);
    })
    .catch(err => {
        console.error(err);
    });

### Delete Query

```javascript
pool.query('DELETE FROM users WHERE email = ?', ['john@doe.com'])
    .then(res => {
        console.log(res);
    })
    .catch(err => {
        console.error(err);
    });

```javascript
pool.query('DELETE FROM users WHERE email = ?', ['john@doe.com'])
    .then(res => {
        console.log(res);
    })
    .catch(err => {
        console.error(err);
    });

## Handling Errors

It is important to handle errors that may occur when working with Mariadb and JavaScript. The mariadb driver provides the ability to catch and handle errors in a JavaScript catch block. The following example shows how to catch and handle errors when executing a SQL query:

```javascript
pool.query('SELECT * FROM invalid_table')
    .then(rows => {
        console.log(rows);
    })
    .catch(err => {
        console.error(err);
    });

```javascript
pool.query('SELECT * FROM invalid_table')
    .then(rows => {
        console.log(rows);
    })
    .catch(err => {
        console.error(err);
    });

## Conclusion

In this article, we have learned how to use Mariadb with JavaScript. We have seen how to connect to a Mariadb database, perform CRUD operations, and handle errors. Mariadb is a powerful and reliable database system that is well-suited for web applications, and JavaScript provides a flexible and versatile language for client-side web development. By combining these two technologies, developers can create robust and efficient web applications that can scale to meet the needs of modern businesses.