how to show the image from the database
use the program
...but seriously, you'll probably have to be quite a bit more specific
in order to receive any sort of assistance. Are you building a web
app? What database are you using? Provide some specifics and perhaps
you'll get a useful answer.
And you also have to choose the right list … which you didn’t, because this list (rubyonrails-core) is not for support questions.