Hi Noobie and Welcome here,
In order for any one of us to attempt to assist you, you need to do a few basic things first please.
1. When setting up your question use descriptive sentences like "Help Connecting to a MS SQL Database"
2. In your actual question, please give us more information to work with like, "I have a situation where I need to connect my B4A App to a MS SQL Database running on a remote server".
3. If you can, then please also post some code to show us that you have already attempted to solve the issue - This way we can help much quicker.
4. This is a very powerful, content rich forum and it's search functionality is excellent and will return a host of information.
Try this:
https://www.b4x.com/android/forum/pages/results/?query=connect+to+SQL - this was easy to get. In the top right of the forum is a search bar.
In there I entered "connect to MSSQL" and pressed enter - The link above is the information that was returned. It's quiet easy actually.
Now if the question is more specific, like "Connect to MS SQL Database Tutorial" then this is returned:
https://www.b4x.com/android/forum/threads/connect-android-to-ms-sql-server-tutorial.13166/#content
And one last suggestion. Please read the Beginners Guide and other documentation - you will get into the B4X platform much quicker if you do this and it will be to your own advantage.
Enjoy your exciting journey in the B4X brotherhood !!