[belajar-access] cara mendeteksi record yang double???

bagaimana cara mendeteksi record yang double pada saat input record? thx..

__._,_.___

SPAM IS PROHIBITED

Your email settings: Individual Email|Traditional
Change settings via the Web (Yahoo! ID required)
Change settings via email: Switch delivery to Daily Digest | Switch to Fully Featured
Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe

__,_._,___