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Databases Querying Relational Databases Subqueries Subqueries

Posted by Max Toth
Max Toth
3,777 Points

Subquery in the WHERE clause not detected?

When answering the challenge question and running the query below, I receive a message: "Bummer: The subquery should be in the WHERE clause." I admit it's not the most beautiful thing I've written, but there is indeed a subquery in the first WHERE clause. So a bit confused as to why this is failing?

SELECT m.ModelID, m.ModelName, AVG(c.StickerPrice) AS AvPr FROM Model AS m INNER JOIN Car AS c ON m.ModelID = c.ModelID WHERE c.StickerPrice IN (SELECT StickerPrice FROM Car WHERE StickerPrice > 30000) GROUP BY m.ModelID ORDER BY m.ModelID ;

1 Answer

Bramyn Payne
Bramyn Payne
19,589 Points
Bramyn Payne
Bramyn Payne
19,589 Points

I think you are over-complicating things here. I am assuming that you are stuck on task 1?

If so, start by breaking down what you need to do and solve each step.

Let's get all cars with a StickerPrice greater than 30000 from the Cartable

SELECT * FROM Car WHERE StickerPrice > 30000;

Let's figure out how to connect the two tables (What columns do they share?), and return that column instead of everything.

SELECT ModelID FROM Car WHERE StickerPrice > 30000;

Next, we can write the query for ModelName

SELECT ModelName FROM Model WHERE ???;

Next, we can add the subquery in the WHERE clause, using the shared column.

SELECT ModelName FROM Model WHERE ModelID IN (SELECT ModelID FROM Car WHERE StickerPrice > 30000);

I hope this helps!