Best way to check for duplicate entry

W

wxdqz

New Member
What is the best way to ensure that the data entered into a col isn't already there? For example:

Say I have a column that is identifying a person by number (Cross checked with another table containing their name etc...). I want to make sure that person doesn't get entered in that table twice. Is there a certain function I should be looking for?

Thanks! hope I explained it well enough.

chadT
 
You must log in or register to reply here.
Back
Top