I don't see a problem here, it's quite simple.
First, read this:  
http://www.webtoolkit.eu/wt/doc/tutorial/dbo/tutorial.html
While you read the tutorial, read the documentation about Wt::Dbo::Session
and Wt::Dbo::Transaction (at least, also take a look at the other classes).
This isn't very hard, because Wt offers a pretty good documentation, so
give it a try:  
http://www.webtoolkit.eu/wt/doc/reference/html/namespaceWt_1_1Dbo.html

Next, you need to get the internal path, the  
WApplication::internalPathChanged
Signal is the way to go (This is the hardest part, depending on your needs  
it will
be straight forward or the complete opposite).

And now read, read and .. read the documentation and play around with it.
I did so and already implemented a simple Blog and User Management by using
Wt::DBo (Btw, thanks for this great thing), it was overall pretty straight
forward.

> Hello Everyone
> Can you tell me how to access the value from database through url or
> path in witty. which function is used and how to give url.

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