how do I trigger a server function if any document in table changed?

I want to trigger a function every time there is any change in the db how do I do that?

for example lets say I have a blog and a user commented, I want to trigger a server function

TL;DR

To trigger a server function whenever there is any change in the database, you can use events in Appwrite. First, deploy your function, then go to the Appwrite console, navigate to your function, and go to the settings section. Under events, you can define the event you want to trigger your function. For example, if you want to trigger the function when a new document is created in the users collection, you can define that from the function settings in the console. You can learn more about events in the documentation here: [link to docs].

you can trigger it by defining it from function settings from console

for example here I'm triggering one of my cloud function when new document is created in users collection

you can define the event in function settings. first of all deploy your function then goto appwrite console >functions >your-function > settings then find Events. and add event.