Comparing Values within list by ID and Assigning Flag

[The_Alternator]

My data is like this:

ID | Region

1A | Upper Midwest

1A | Upper Midwest

1A | Pacific

2B | East Coast

2B | East Coast

3C | Pacific

3C | Pacific

3C | Northwest

3C | Northeast

What I want to do is classify, by ID, whether there are multiple regions for the same ID or whether they're all the same. So for 1A, I would want a field saying "Multiple" as a value for each record with 1A as the ID. So like this:

ID | Region | Classification

1A | Upper Midwest | Multiple

1A | Upper Midwest | Multiple

1A | Pacific | Multiple

2B | East Coast | Same

2B | East Coast | Same

3C | Pacific | Multiple

3C | Pacific | Multiple

3C | Northwest | Multiple

3C | Northeast | Multiple

Thanks

[Luke_C · Accepted solution]

Hi @The_Alternator 

One approach you could use is to use the summarize tool to count the distinct regions within each ID. Then use an if statement to classify based on if that count is >1.