Hi,
Is it possible to connect to the SQL database of an CRM 2011 online version? With an on-premises version it is not a problem.
But I don't know if it is support for the online version?
No it is not possible to connect DIRECTLY to the SQL database.
You can use the CRM web services though to perform operations like create, update, select, delete, etc....
Here is a link to the SDK for more help on that.
http://www.microsoft.com/download/en/details.aspx?id=24004