Key field will generate one club values based on delimiter to produce the Autonumber. For Ex:
Load * Inline [
Name, Company, Sales
A, A1,
B, B1
];
And condition as follows to generate key
Name & '|' & Company as Key
Output: A|A1 and B|B1
Where as Below condition will produce
AutoNumber(Name & '|' & Company) as Key
Output: 1 and 2
You can use Key as filter for selection from entire model.
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