hhey any body knows how to upload a file or image in database and retrieve it,i know i have to use file column and rmagcik but dont know how to apply them,can anybody tell me step by step implementation.

thanx in advance,

This tutorial explains how (I presume you're using rails and not radicore or something else)

If I were you I'd only store the location of the file in the database and store teh actual file on the filesystem - it will help your database performance.