I am not sure about this but i am giving small hint to u try like this
step 1) first create a object for particular database server.
step 2) next load the XML file into dataset
using
Dataset ds=new Dataset();
ds.WriteXml("your xml file path");
then these object will assigned to database object.
Note: which fields(tags) u have in Xml file same columns fields in your sequel database.
.......I am not sure........my ...idea