How can produce .gif or .png on server side from the database?

[yangshuo]

I want to create .gif or .png on server side. The
server-side will produce graphs and charts from the
real time database source or releated database (eg.
ms sql server), requiring no additional client-side
controls(eg. ActiveX or Java).
For example ,on client-side, when a user want to
see the history chart from '1998-06-08 16:12:00'
'1998-06-08 21:12:00' , after he submit ,the server
side will produce a image from backend database and
return the image to the browser in JIF or, PNG
formats quickly.
Can you help me?
Thank you .