Avatar of Fritz Paul
Fritz Paul
Flag for South Africa asked on

How to define combination of fields as a non duplicate combination.

I have a table with some fields. Two of them are Nr (string) and Anno (integer). Each of these two may exist as duplicates, but the combination of any two may only exist once. Is there a way to define the table to ensure that?
(The reason is that Nr refers to a customer and Anno refers to a year and each customer may only occur once each year.)
SShot of table design
Microsoft Access

Avatar of undefined
Last Comment
crystal (strive4peace) - Microsoft MVP, Access

8/22/2022 - Mon
crystal (strive4peace) - Microsoft MVP, Access

Log in or sign up to see answer
Become an EE member today7-DAY FREE TRIAL
Members can start a 7-Day Free trial then enjoy unlimited access to the platform
Sign up - Free for 7 days
Learn why we charge membership fees
We get it - no one likes a content blocker. Take one extra minute and find out why we block content.
Not exactly the question you had in mind?
Sign up for an EE membership and get your own personalized solution. With an EE membership, you can ask unlimited troubleshooting, research, or opinion questions.
ask a question
Fritz Paul

Thanks. That was so quick and sooo helpful
crystal (strive4peace) - Microsoft MVP, Access

you're welcome ~ happy to help
Your help has saved me hundreds of hours of internet surfing.