How to Write PostgreSQL Queries for Node.js

How to Write PostgreSQL Queries for Node.js

How to Write PostgreSQL Queries for Node.js. The four basic queries that you can use to create a RESTful api using Node.js and PostgreSQL. Create a simple NodeJs PostgreSQL query example app with the `INSERT` SQL statement.

The four basic queries that you can use to create a RESTful api using Node.js and PostgreSQL

Introduction

If you are writing a RESTful api in Node.js you’ll have to decide between a relational database or a non-relational database. If you decided on the former, you’ll need to know how to write basic CRUD queries so that your api can talk to your database in a meaningful way. In this blog I’m going to go over the four basic queries that you can use to create a RESTful api using Node.js and PostgreSQL. Note: This blog assumes that you already have Node.js, PostgreSQL and pg installed.

Query for Create

Here we are making a route to handle a post request where we insert new data into a table called “todo”. We are making a new todo where our description is equal to the description that our user put in their request. The ‘$1’ acts as a placeholder for a variable, and lets us insert any variable we want into our query. Make sure to write ‘RETURNING *’ as it’s the only way to receive information back from the query. We then send a json response with the data we just updated.

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