Display Image from Database in Master Page of ASP.Net Website

hi friends...

I hv a master page with image field which displays the profile pic of the user. now i want to display this image to the image field  on the master page as and when the user logs in (like in fb) i hv used http handler to display the image from db. i m able to imsert and display image from db.

but how can i write a select query to display the users image.

m using sql server 2008 and asp.net vb