ScaleOut StateServer (SOSS) was not designed to be a replacement for traditional relational databases—rather, it is designed to be a high-performance, highly-available, distributed key/value store. As such, it does not support full-blown SQL query semantics, and it does not ship JDBC/ODBC/OLEDB data access providers.
The service does support indexing values on your stored objects and performing queries against those indexed values using our NamedCache APIs in Java, .NET, and native C++ (the .NET APIs also provide LINQ support for SQL-like query semantics), but this query support is not complete SQL, and it is intended for relatively infrequent analysis purposes rather than regular object access. You will find that key/value store products like SOSS typically encourage you to access your objects directly by key rather than by performing queries.