I use wysiwyg editor but it only allow embed image by link
Use fileupload plugin, set permissions in dashboard.
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I do not know what are you asking but i know about how to upload images to a mySQL db .
normally files are stored in a server's folder. The DB only keeps the path to the image.
DB's are designed to store a high number of entries, they're not good to store huge records, like images.
docs about uploading a file via PHP can be found under:http://www.php.net/manual/en/function.move-uploaded-file.php
hope that helped a little.
Software Development India