Generate and insert data into a Postgres database

This is Workflow 1 in the blog tutorial Database activity monitoring and alerting.

Prerequisites

A Postgres database set up and credentials. Basic knowledge of JavaScript and SQL.

Nodes

Cron node starts the workflow every minute. Function node generates sensor data (sensor id (preset), a randomly generated value, timestamp, and notification (preset as false) ) Postgres node inserts the data into a Postgres database. You can create the database for this workflow with the following SQL statement:

CREATE TABLE n8n (id SERIAL, sensor_id VARCHAR, value INT, time_stamp TIMESTAMP, notification BOOLEAN);