How to retrieve the blob image from oracle database.

Question

Hi,
     I have a emp table with emp_id,ename,empimg as fields.I stored the empimg as blob in oracle database.I would like to know how to retrieve the blob image from database.I found so many online articles but everywhere they are having a separate table for image and retrieving the image based on image id.

    How to retrieve the image with emp_id.Is it really necessary to have a separate table for images?


Sita.