Creating notification based on table insert in Android

I am new to Android and my requirement is this. I am in need to develop an application that will list all the events (past and upcoming). These event details , I will fetch from tables and that table will have only past events. For the upcoming events, I will be inserting into the table which will create a notification for the same.

My doubts:

1. What is the table I should use (SQLite(inbuilt) or MySql from any hosting services) ?

2. If SQLite, Is there a way from GUI, I can insert data so that it will reach all users having this application?

To be simple, how I can achieve this entire functionality?

Thanks in advance!!!