Update Data with Node.js & PostgreSQL | UPDATE Query, PUT API & Affected Rows

Pubblicato il: 19 luglio 2026
sul canale di: Array Blog

In this Video of this PostgreSQL + Node.js series, you'll learn how to build an Update API using Express.js and PostgreSQL.

We'll write an SQL UPDATE query, modify existing records, and check the number of affected rows to determine whether the update was successful. You'll also learn how to return meaningful responses when a record doesn't exist.

📚 What You'll Learn
Build a PUT/UPDATE API with Express.js
Write SQL UPDATE queries
Update records in PostgreSQL
Pass route parameters and request body data
Check the number of affected rows (rowCount)
Handle "Record Not Found" scenarios
Return proper HTTP status codes
Test the API using Postman or another API client

🛠 Topics Covered
Node.js
Express.js
PostgreSQL
UPDATE Query
PUT API
SQL
REST API
CRUD Operations
Route Parameters
rowCount
Error Handling
Backend Development

By the end of this tutorial, you'll be able to update existing records in PostgreSQL safely and verify whether the operation succeeded before sending a response.

👍 If you found this tutorial helpful, Like the video, Share it with others, and Subscribe for the next lesson where we'll build the Delete API and complete CRUD operations.

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#NodeJS #PostgreSQL #ExpressJS #RESTAPI #JavaScript #BackendDevelopment #SQL #CRUD #Database #WebDevelopment #Programming #Coding #API #LearnCoding #Tutorial

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