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Patrik Horváth
11,110 PointsSQL Select SUBQUERIES
https://teamtreehouse.com/library/querying-relational-databases/subqueries/subqueries
Tank 4 Of 4 : In a car database there is a Sale table with columns, SaleID, CarID, CustomerID, LocationID, SalesRepID, SaleAmount and SaleDate and a Customer table with columns, CustomerID, FirstName, LastName, Gender and SSN. Use a subquery as a derived table to show all sales to female ('F') customers. Select all columns from the Sale table only.
My QUERY with Error : Bummer! The subquery didn't return all CustomerIDs for people who identify as female (F).
SELECT * FROM Sale INNER JOIN (SELECT * FROM Customer WHERE Gender LIKE "F") AS c ON Sale.CustomerID = c.CustomerID;
but i think i have selected them ALL :/
1 Answer
Steven Parker
231,128 PointsYou have indeed created a solution that would return the correct rows. 
You might also try prefixing that first asterisk with "Sale.". But if that doesn't work, you might want to report it as a bug to Support.
Patrik Horváth
11,110 PointsPatrik Horváth
11,110 Pointsbut if i change * to Sale.CustomerID it is not let me pass this chalange =\
Steven Parker
231,128 PointsSteven Parker
231,128 PointsBut the table in the sub-query is "Customer", not "Sale". Plus you don't need to prefix the field at all inside the sub-query, since there is only one source.
And to facilitate the most accurate answers, always provide a link to the course page you are working with.
Patrik Horváth
11,110 PointsPatrik Horváth
11,110 Pointsafter getting : fd7e0c01-7ddb-460c-81c2-c11f3d124e64.rb:35:in
eval': undefined methodshift' for "SQL Error: no such column: Customer":String (NoMethodError) from fd7e0c01-7ddb-460c-81c2-c11f3d124e64.rb:35:in `eval' from fd7e0c01-7ddb-460c-81c2-c11f3d124e64.rb:35:init worked :D, Thanks :)