David, Can you post those two data sets? I couldn't find them on Tableau learning portal.
Attached are the sample datasets supplied by Tableau as part of the "Getting Started" tutorial.
.csv file seems to be zipped as I uploaded it for this reply, but I attached a non-zipped version (tried twice.)
I've also attached the workbook.
Thank you for your prompt answer. Sorry for my delay (I've been out of town...)
I see what you are saying and agree.
So, I am left with a lingering question. I wonder if there's a way to make this information more explicit/highly available in the Data Source panel.
Maybe I'm just an oddball exception, but the discrepancy between what I saw in the tutorial video and my results was disorienting, and I didn't know I'd have to go to another panel and do something non-intuitive to get some sort of join outcome verification.
Wouldn't it be important to summarize join outcomes at the point of the join action?
You can partially do it in the data source panel. On the right side, Tableau lets user input the number of records he/she wants to see for a sample. And if you input say, 1 million records, Tableau only shows the 1079 rows of data for inner join and 25728 rows of data for Left join.
It isn't completely satisfies what you're asking for but helps little bit.
Thank you again.
Am hoping, then, for a data summary dashboard to provide a visual analytic overview of the data sources and the results of join actions.