Using a field value in a dataset result

Let's say for instance you have this Dataset with 2 fields, LookupKey and DealerName.

Screen Shot 2019-03-06 at 10.50.50 AM.png2058x1286 65.5 KB

Link to schema-
https://www.mockaroo.com/347ead20

Now we want to lookup a DealerName using join criteria of the from_dataset() function.
This schema has 2 fields, id and Message. The id is just a formula type with Random(1,1000). We will use this field to lookup a DealerName from the dataset.

Screen Shot 2019-03-06 at 10.59.00 AM.png2058x1286 218 KB

Link to schema-
https://www.mockaroo.com/30949710

Hope this helps you out.
Rich