java – Does complex sql queries should happen in Backend or its safe to do in android mobile-ThrowExceptions

Exception or error:

Is it ok to do complex sql queries in mobile? I am using ionic with android (java) and have two databases with Room DB. which contains 9600 entries each. I want to perform some complex queries like get ‘firstname’ which contain char ‘demo’, having age more then ’70’ and and and.

So my questions are:

  1. does this kinda queries make mobile slow even they async?
  2. should it better to send request to backend and let it do the calculation (backend have same DB).
  3. old mobiles with less RAM might not work?? right


How to solve:

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