Cause i want my app to connect in my server database in sqlite expert hehe
Of couse there's more (depending of what you need or what kind of server you have):
Using PHP with MySql (this ist the most common way how to have "an online app")
All of the cheap hosted servers support that solution. See my examples how to do that and visit
https://www.w3schools.com/php/php_mysql_intro.asp
RDC just supports database operations, with php you can do all things a language usually supports (like sending emails from your server or calling other functions like sending FCM messages from your server (= Push notifications). In B4x you use OKHttpUtils to call your php script very easy.
There are other ways, too (like if you need to call a script from another one's server which might be asp .net or similar). Then the OkHttpUtils call is a bit different,