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Databases Querying Relational Databases Set Operations Review and Practice

Posted by Terry Zhong
Terry Zhong
4,058 Points

Possible error in video - EXCEPT venn diagram min 1:09

I think the Venn diagramm for EXCEPT is wrong in this video (minute 01:09) from Review and Practice.

In light blue should be only the left table - "Furniture" but minus "TV Stand". Maybe I am getting it wrong, but I cross-checked it with e.g. this source (https://www.techonthenet.com/postgresql/except.php).

Minor stuff: For consistency, the title of the slide could be "EXCEPT" in uppercase.

For UNION it is correct: all is light blue.

For INTERSECT it is correct: only "TV stand" is light blue. For consistency, the title of this slide could be "INTERSECT" instead of "Intersection".

1 Answer

Mark Sebeck
MOD
Mark Sebeck
Treehouse Moderator 38,304 Points
Mark Sebeck
Mark Sebeck
Treehouse Moderator 38,304 Points

Good catch Tarek. Steve Parker actually answered a similar question here