NodeJS is a JavaScript-based server programming language. you can use NodeJS to write any application.
Databases play an important role in any application. Postgres is a relational database used to store your application’s data so that you can use it later on.
You need to understand the details of how you can connect a Postgres database from your NodeJS application and then perform the below operations on the database
- Write new data to the Postgres database
- Update the existing data in the Postgres database
- Read the existing data from the Postgres database.
Many NPM modules will help you connect and perform operations on a Postgres Database using Nodejs. we are going to list down some of the popular NPM modules
Sequelize
Sequelize is an easy-to-use and promise-based Node.js ORM tool for Postgres, MySQL, MariaDB, SQLite, DB2, Microsoft SQL Server, Snowflake, Oracle DB, and Db2 for IBM i. It features solid transaction support, relations, eager and lazy loading, read replication, and more.
Postgres.js
Postgres.js – The Fastest full-featured PostgreSQL client for Node.js, Deno, Bun and CloudFlare
Observation
- Postgres.js utilizes Tagged template functions to process query parameters before interpolation.
- writing queries is a little bit difficult and there is a learning curve.
Knex
Knex.js (pronounced /kəˈnɛks/) is a “batteries included” SQL query builder for PostgreSQL, CockroachDB, MSSQL, MySQL, MariaDB, SQLite3, Better-SQLite3, Oracle, and Amazon Redshift designed to be flexible, portable, and fun to use.
It features both traditional node-style callbacks as well as a promise interface for cleaner async flow control, a stream interface, full-featured query, and schema builders, transaction support (with savepoints), connection pooling, and standardized responses between different query clients and dialects.
Node-Postgres
Non-blocking PostgreSQL client for Node.js. Pure JavaScript and optional native libpq bindings.
This repo is a mono repo containing the core pg module and a handful of related modules.
You can use the above NPM Postgres Modules to connect your NodeJS application to Postgres.
Next: Web Frameworks in NodeJS
Raj Ranjan