WCF Services - Exam 70-487
http://www.slideshare.net/dkaps6/01-wcf-services
OLE DB Tutorial
http://msdn.microsoft.com/en-us/library/aa288452%28v=vs.71%29.aspx
Connecting to an OLE DB Data Source Using ADO.NET
http://msdn.microsoft.com/en-us/library/aa719763%28v=vs.71%29.aspx
creating a WCF Data service
https://msdn.microsoft.com/en-us/library/vstudio/cc668184.aspx
Sample database
https://msdn.microsoft.com/en-us/library/dd264901.aspx
powershell : invoke-webrequest
Postman
List web services
http://www.programmableweb.com/apis/directory