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#ask-questions
Title
# ask-questions
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prehistoric-waitress-6977

05/20/2022, 3:19 PM
Hi GB team, how to define a target group of users with simple rule? I’m looking for a list of user uuids with OR relationship but it seems only AND relationship is offered. Do I have to use mongo query syntax in this case?
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future-teacher-7046

05/20/2022, 3:20 PM
There is an operator
is in the list
where you can specify a comma-separated list of ids
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prehistoric-waitress-6977

05/20/2022, 3:21 PM
oh cool, thanks Jeremy
@future-teacher-7046 I could also use multiple overriding rules to achieve the same, right?
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future-teacher-7046

05/20/2022, 5:01 PM
Yes, that works too
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prehistoric-waitress-6977

05/20/2022, 5:18 PM
What would be the difference between the two options?
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future-teacher-7046

05/20/2022, 5:29 PM
Using a comma-separated list is easier since there's only one rule to deal with. Using separate rules is more flexible since you could have completely different targeting conditions or experiment settings.
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