Where and how to store data in a SilverLight application?

Question

Microsoft Silverlight

Actually, SL cannot work directly with the SL file system, and to connect with a database like MS SQL Server, you need to create a service.
As an option, there are still different NoSQL databases, but again, it's a matter of convenience ...
Actually, which database will be most convenient to work with? Interested not only in the possibility of obtaining various kinds of complex queries, but also data entry by means of the database itself, and not programmatically (that is, without a bunch of code for creating tables, making records, etc.). Those. Interested in something like MS SQL Server, but without writing services, if there is one of course.

Answer 1

The best option is of course to create a web service and connect it to the application. I don’t know why it’s inconvenient for you, maybe you just don’t know how to cook it?
But there are a couple more options:
.NET RIA Services
Sterling (for NoSQL lovers)
There is also Silverdb
Clarifications from the comments:
A good article about web services for Silverlight
Silverlight was intended to run in a browser, which is why it can only work with data through web / RIA services , well, either through internal databases like Sterling and Silverdb, but they will have to be filled through the application itself, that is, writing code. The third is not given as far as I know.