Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Databases Querying Relational Databases Subqueries Subqueries

Posted by Sam Speaks
Sam Speaks
6,013 Points

What is this supposedly outputting? (Subqueries)

The question asks for the Make Name, but the error at the end says something about not outputting all of the Make ID's.

I have tried both starting with SELECT MakeID and SELECT ModelID.

Is there something i'm obviously missing here?

Challenge Task 1 of 4 In a car database there is a Model table with columns, ModelID, MakeID and ModelName and a Car table with columns, CarID, ModelID, VIN, ModelYear and StickerPrice.

Use a subquery along with IN to list all the Model Names with a Sticker Price greater than $30000

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

1 Answer

Steven Parker
Steven Parker
231,236 Points
Steven Parker
Steven Parker
231,236 Points

There are a few issues:

  • the instructions ask for Model Names but ModelID is being selected
  • the (main) filter condition uses StickerPrice but that column does not exist in the Model table
  • the subquery should select only the column being compared by the WHERE...IN clause
  • the main filter should use a column that is common to both tables