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Databases

Andrew Federico
Andrew Federico
7,498 Points

Is the EXCEPT Venn Diagram correct in this video?

Re: https://teamtreehouse.com/library/review-and-practice-2

I realize I am new to this, but in the video at 1:05, the way the Venn diagram is shown, implies it will return more than "EXCEPT" should, and the intersecting data of TV Stand should be shaded along with Electronics to show it will all be excluded with only Furniture returned.

2 Answers

Steven Parker
Steven Parker
229,968 Points

Based on the diagram shown for Intersection, the light blue highlighting is being used to indicate records returned, not records omitted. And with that in mind, the diagram for Except is accurate for when the first query returns values for "Electronics".

Note that this differs from the diagram shown for Union, where nothing was highlighted but I would expect that everything would be.

You might want to report this as a bug to Support.