will client.println( ) print the content in URL Bar directly ?
I don't know what this question means. A "URL bar" is a feature of a web browser, as far as I know. The client.print() function does not communicate with a web browser, so the answer would be no, as I understand what a "URL bar" is.
The client.print() function communicates with a server, and is how a GET request is made.
A browser application takes the information in the "URL Bar", parses it, and makes GET requests, too.
because to store in database my requirement is that it should print variable along with its value in above mentioned format in address bar.
In the above mentioned format, yes. In the address bar, no!