What technologies to choose for building a client-server?

Question

MySQL

Good!
I want to build a client-server application, or whatever you call it, the question is choosing SQL and programming language

Well, the client is android / ios, I'll start with android, there is a SQLite base. The question is, I need a server on which the database will hang to update the databases of client applications. There will be two databases on the server, the client database will be updated from one, the second should store what the client entered (probably you can get by with one). Next Admin, here I want to scribble a program that will connect to both databases and present all the information in a digestible format, tk. there are more than 10 parameters for each database element. From the database where it is stored, what the client entered, you need to load the admin for verification, if everything is fine, then he redirects to the server to the second database, and of course he can create new elements in the second database

If everything is more or less clear with the client, then what to do with the server and the admin, i.e. what language and database to choose to make it easier (python?). The admin sits at our PC, so we need to build another application where it will be convenient to make changes to the database, ideally in a graphical representation. So, advise how and what is better to choose
C database and server has never worked before

Answer 1

Well, the client is android / ios, I'll start with android, there is a SQLite base

ios has it too, but it's not fundamental
you're right, it's better to have one
the admin will have enough of the usual web muzzle
, don’t complicate your life, read about the rest api (no need to be afraid of the words in bourgeois, so that you don’t come up with the rest yourself)
take any language that you know better on the server, the same python is perfect, but best of all is which you know better

Answer 2

The only advice that can be given to you is that you should choose the language and database that you know best.

Answer 3

Take a bunch of PHP + MySQL under the framework. There are plenty of docks and specialists, everything has been tested and stabilized for a long time.