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Databases Querying Relational Databases Subqueries Subqueries

Tommy Gebru
Tommy Gebru
30,164 Points
Posted by Tommy Gebru
Tommy Gebru
30,164 Points

Challenge Task 4 of 4 Bummer: SQL Error: near "SELECT": syntax error

This is the last challenge task 4 of 4, I couldnt get to an answer or even get a different error message for a while, so I thought to share it here with the community

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

2 Answers

Gabriel Plackey
Gabriel Plackey
11,064 Points
Gabriel Plackey
Gabriel Plackey
11,064 Points

Okay, making progress. With your inner join, you don’t need the table name “customer”. You’re joining a sub query, not a table. So it would be inner join (subquery) as alias on whatever. I think that should do it. But let me know.

Tommy Gebru
Tommy Gebru
30,164 Points
Tommy Gebru
Tommy Gebru
30,164 Points

Oh wow that did it - i removed the table name 

SELECT *
FROM Sale
INNER JOIN
(SELECT CustomerID
FROM Customer
WHERE Gender = 'F'
) AS "isFemale"
ON Sale.CustomerID = isFemale.CustomerID;
Gabriel Plackey
Gabriel Plackey
11,064 Points
Gabriel Plackey
Gabriel Plackey
11,064 Points

What is you current answer to the challenge? Going blindly on this but based on your error and what I believe the correct answer is, you may need to alias your query join, as something like 'c' then do c.customerID

Tommy Gebru
Tommy Gebru
30,164 Points
Tommy Gebru
Tommy Gebru
30,164 Points

I went ahead and shared my code above in the description. I created an ALIAS and provided it as the JOIN criteria at the end of the code

BTW: I got a new error message so treat this as a new question too :eyes: