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Simple JOINs recap
Various kinds of JOINs
Filtering with LEFT JOIN and RIGHT JOIN
Summary
20. Exercise 3

Instruction

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Exercise

Show all information only for those items that weren't auctioned off.

Stuck? Here's a hint!

Type:

SELECT
  *
FROM AuctionItem
LEFT JOIN Bidder
  ON AuctionItem.Id = Bidder.BoughtItemId
WHERE Bidder.BoughtItemId IS NULL