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Databases Querying Relational Databases Subqueries Subqueries

Grant Whiting
Grant Whiting
3,542 Points
Posted by Grant Whiting
Grant Whiting
3,542 Points

Question 4 asks me to get a list of all Female customers but I'm told this query doesn't do it:

SELECT s.* FROM Sale AS s INNER JOIN ( SELECT CustomerID FROM Customer WHERE Gender = 'F' ) AS FemaleCustomer ON FemaleCustomer.CustomerID = s.CustomerID;

1 Answer

Travis Alstrand
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Travis Alstrand
Treehouse Project Reviewer
Travis Alstrand
.a{fill-rule:evenodd;}techdegree seal-36
Travis Alstrand
Treehouse Project Reviewer

Hi Grant Whiting 👋

Your SQL statement definitely looks valid. I think this is another situation where the back end of this challenge is looking for something specific, or is getting mad with extra things added. In this case, I believe the alias added to all the Sales is what's throwing it off.

This worked for me

SELECT * 
FROM Sale 
INNER JOIN (SELECT CustomerID FROM Customer WHERE Gender = 'F') AS FemaleCustomers 
ON Sale.CustomerID = FemaleCustomers.CustomerID;