I have created custom shape files that work and load successfully.  I now want to link additional business data from a sql source.  Are there any examples or advice on how to accomplish this?

Basic idea: hover over or click a shape and see additional information about what that shape represents, but is not included in the shape file.  I assume I can find out that is shape 1, can I? then can I look at my sql data set and grab additional information I asociate with shape 1?