I have used mdb with 4 fields - rollno, name, date & attendance.
I have design a form for data entry by considering above fields.
I have connected it to DAO database object.
Suppose I have saved data with following values
roll = 1 & date = 15/12/2006
now, I want to write code which avoid duplicate entry i.e user could’nt save record with same values ie roll = 1 & date = 15/12/2006.