mysql database & image; why do it?

this is more of a storing images issue but i will ask here…

what is the point of storing an image in an sql database, instead of uploading the file. (at least thats how i understand what was being said.)

also, how do you do this. (besides creating the blob field.

what is the benefit of this, over just storing a http path to the image file

i am looking for pro’s and con’s, and a how to do this, since i have just heard about it here, and want to test it myself