You can do that by adding an IF statement to show a blank value if the database field is empty or null. If you send a copy of the code currently used to display the value on the page I can show you how to adjust it.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.