Develop Reference

Does android support large database tables

I am working on project that require storing large data in tables in smartphone within the application. I already searched through google about this topic but did not find anything. so I need to know if android smartphone support database of 700 MB and how the response time would be to retrieve the data.

Android contains an SQLite DBMS within itself. You can create and manipulate databases within your android application with SQLite. You can find tutorials for creating and manipulating SQLite android databases: here
They represent internal dadabases in the phone like the contacts manager application that we find in each phone.
Otherwise you can put your database in a remote server and you can manage it using RESTful web services : here

Integrate Augmented Reality app with database

I'm quite new to AR and Unity3D, but I've learnt how to create simple AR app using Vuforia SDK for Unity. Till now I can work with 3D object, image target and export into Android project.
Now, my question is: How can I use database (MySql, Sqlite, etc.) with the AR? For example, I'd like to show some information retrieved from db on my 3D object in Android application.
I am not sure should this be implemented either in Unity or Android solution? I also could not find any relevant tutorial and would appreciate any advice.
Edit:
More on database
It primarily would contain text data, link to images which will be located on the remote server as well as database itself. Preferably, it should be MySql database. On the other hand, I will use RESTful web services.
I know I can use all this in Android project, but how can I access the 3D object within the code?

For the webserver side, you can use php or any other language. The recommended one is php so you have to learn php.
For your main app, you can use Unity, use the [WWW][1] class to connect to the server. When connected to the server, the php script will retrieve information from the database and send it back to Unity. This supports texts, images, audio and many others.
https://stackoverflow.com/a/25200894/3785314
http://www.cs.vu.nl/~eliens/.CREATE/local/essay/09/nm2/klitsie-joost.pdf

What business logic can I share between my Android and iOS apps using Xamarin?

I want to build an app that targets multiple platforms (Android and iOS) using Xamarin. This app consists of retrieving specific datas from MySQL database, store them in an internal database (using SQLite database for Android for example) and make a screen containing a list of products names to make it simple. Doing this, the device running my app can show the list offline. In addition to that, the client using my app (either Android device or iOS device) when it gets online, should be notified of modifications in the mysql database and update the internal database.
Creating this cross-platform Android and iOS app with Xamarin normally involves creating three types of projects:
A portable class library project that contains the shared code
An Android application project containing the Android specific code
An iOS application project containing the iOS specific code
It's fairly easy to notice that the User Interface is the part that I can't share between Android and iOS. But I find it so difficult to find the part that can be shared between them.
Is it possible to share the logic of
Retrieving datas from MySQL database?
Getting notifications when MySQL database is updated?
Storing datas in an internal storage?
Retrieving datas form the internal storage?

Your shared project can (generally) contain anything that isn't platform or UI specific, like:
data access
domain models
service code
view models
utility code
Also note that if you use Xamarin Forms you can also put your UI code in shared project.

creating a database for a website and mobile app

I want to create a database so both my website and mobile app could draw info from there.
I know how to execute queries with a website, but I have little to none experience with mobile applications.
I heard I can't just use any form of database(mysql, mongodb) because they are not compatible or something.
so how do I create my database so it will be compatible with android iOS and PC.
A few guidelines to get me started would be great :)

Sounds like you need to build an API to handle interaction between your mobile applications and your database, in much the same way your website communicates with your database. The primary difference will be that you will be returning JSON/XML to your apps, rather than displaying HTML to a user.
I thoroughly recommend JSON over XML as it is not as verbose and data usage will drop dramatically. However, if you're data structures are quite detailed / complex, go with XML.
To get started with building an API I'll recommend Slim PHP. You'll probably want some form of ORM also, for which I highly recommend idiorm/paris
The documentation for both of these frameworks is great, so have a dig around.

You can create a database with MySQL and draw info from your site with mysql queries. As for your mobile app, you can use some php pages and JSON Parser to draw data from the database. See example

As you say android doesn't support external databases such as MySQL. The easiest thing to do would be to create a MySQL Database that your website and android app can access.
The website would access the MySQL database as normal but the android app instead posts data such as variables to a PHP script, the PHP script can then get the retrieved data and perform the mysql queryies and json_encode the output and print the encoded data. The android app would then receive the outputted json format and the android app can then decode the json and process the data accordingly.
http://www.helloandroid.com/tutorials/connecting-mysql-database has some tutorials on how this can be done

You need to use Service - Oriented Architecture.
You may use REST API methodology for creating interfaces.
See this example
www.hassanpur.com/blog/2010/09/android-development-implementing-a-simple-client-server-model/

which kind of database to use with android app?

I am developing an android program for my university. I am confused about which database to use.
What I want is that when the user is connected to the internet the program will check for any updates in the backend database. If there is any, the program will sync it with Android device.
Let's assume that after while the user opens the program in place with no internet, the program will work just fine because the file is already in his mobile.
I chose Access and created .xml file and by the help of this site: XML resources in android. I learnt how to read it.
Actually this program is my senior project. I dont want the judges to ask me why didn't I use MySQL or SQLite.
Which database system should I use? Is Access the right database system to choose?
I want to do a program that looks just like Univ of Kent program.

Parsing XML could take time, also in XML you have no choice but to load the whole file.
SQLite is fast, simple to use and very dynamic.
Android offers a very simple SQLite API. Androoid SQLite API
If you are interested in reading more about all the data storage types in Android visit this link

It depends upon your requirement. lets say you want to build something which handles and stores the data on your device locally then SQLite is a good option (you can use firebase as well).if you want to do some sort of calculation on you data on a remote server then firebase is a best choice .
by using firebase you can store your data generated by your users and then if you want you can carry out some analytics as well.
i would prefer Firebase .