I gone through but i didn’t get clearly as their examples are very few. I am completely new to this. So if someone helps for first time then i will catch it. Still i am going through few
The basic issue is that if you’re looping through a structure 2 levels deep, you’re exposing yourself to a problem. You can end up having to load something huge in order to get at one data point. Take a look at how they suggest storing chat messages, to keep the storage flat. Your budget categories are like the chat messages.
I gone through few videos and tutorials… But not getting how to improve my database structure and how to retrieve those. If you guide me it will be helpful to go to next task
Don’t do this. There’s a lot of third-tier information out there. It’s not surprising you didn’t get anywhere. Start with the official docs, and go deep into them. The docs are good for both Firebase and Angular. (Ionic is only about B+ level I’d say, but that’s a different issue.)