Where Can I Find A Simple, Yet Complete Sample C++ SQL Web Application?

I am somewhat new to C++, and have looked high and low for a simple C++ Web based SQL database application with source code. An example might be an address book application with CRUD plus browse. I learn best by dissecting sample applications. It also gives me a jump start so I can get something productive done fast. What I am looking for:

1) Full running application written in C++. 2) Cross-platform. 3) SQL database data storage. 4) Web based front end. 5) Open source libraries.

I have found bits and pieces but not a full running sample application. Any help would be appreciated.

Michael