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);