how to push data to database through wcf?

hi,
Is there a way that we can connect android application with central database server ie MS sql server

see basically i have a database which is accessed by both website and android.....database used is my sql server .Connecting database to website is fine but how it can be done through android app??

i found that this can be done uisng webservices...but i dont know how to push the data out in either JSON format through WCF ...
any help....