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I have a Journey where it does a decision split based on a Data Extension Status field = Planned. I am using the "contact data" evaluation option as the status can change from the time the person is initially injected into the journey.

Eg: Person enters the journey as status = planned however along the way have their status changed to cancelled or rescheduled.

Based on these changes the person will take a different route.

When using contact data i get this message "At least one attribute in this filter criteria could produce multiple matching values. By default, Journey Builder uses the first matching value. You can use attribute-to-attribute comparison to determine the right match"

I have a primary key based on the event ID so this is unique and will only be in the data once, however a person could be in the Data Extension multiple times over the period of a year with different Event ID's.

My Question is when the Journey does a match to check the record is it based on the Data Extension primary key or Subscriber key?

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Contact Data always uses contactkey to lookup to the data extension using the field you linked to contactkey in data designer. If you have a 1:N of contactkey to status, you need to leverage 'Attribute to Attribute comparison', where you use eventid from Journey Data to eventid field in the Contact Data data extension

  • So just to make sure im reading the Attribute to Attribute comparison if i use EventId = EventID and Status = Planned then it should work correctly? – Andyw Aug 15 '19 at 20:27
  • Yeah, its best to think of it like a sql statement where select top 1 status from DE where contactkey = contactkeyin journey and eventid= eventidfromjourney – EazyE Aug 15 '19 at 20:29
  • Great thanks for your help – Andyw Aug 15 '19 at 20:35

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