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Databases Querying Relational Databases Joining Table Data with SQL JOIN Queries

Tadjiev Codes
Tadjiev Codes
9,626 Points
Posted by Tadjiev Codes
Tadjiev Codes
9,626 Points

In a car database there is a Sale table with columns, SaleID, CarID, CustomerID, LocationID, SalesRepID, SaleAmount and

In a car database there is a Sale table with columns, SaleID, CarID, CustomerID, LocationID, SalesRepID, SaleAmount and SaleDate. The database also has a SalesRep table with columns, SalesRepID, FirstName, LastName, SSN, PhoneNumber, StreetAddress, City, State and ZipCode.

Show the First and Last Name of each sales rep along with SaleAmount from both the SalesRep and Sale tables in one result set.

SELECT firstname, lastname, salesrepid, saleamount
FROM sale sa
INNER JOIN salesRep AS sr 
ON saleid = SalesRepID;

It returns ambiguous salesrepid name? What's the problem here?

Tadjiev Codes
Tadjiev Codes
9,626 Points
Tadjiev Codes
Tadjiev Codes
9,626 Points

Actually It shsould be with sa. and sr. But doesn't seem to be correct yet.

SELECT firstname, lastname, salesrepid, saleamount
FROM sale sa
INNER JOIN salesRep AS sr 
ON sa.saleid = sr.SalesRepID;

I takes too long time to load these challenges exactly in this part sometimes gives correct and sometimes wrong. Mailed to Treehouse help to fix it

3 Answers

Steven Parker
Steven Parker
231,269 Points
Steven Parker
Steven Parker
231,269 Points

You're getting close, but the challenge asks for "the First and Last Name of each sales rep along with SaleAmount", it does not ask for the salesrepid.

Also, when you join tables, the ON terms should be something both tables have in common. So here, you'd want to use the SalesRepID in both tables instead of sa.saleid in one of them.

Tadjiev Codes
Tadjiev Codes
9,626 Points
Tadjiev Codes
Tadjiev Codes
9,626 Points

Alright Thanks a lot)

SELECT firstname, lastname, saleamount
FROM sale sa
INNER JOIN salesRep AS sr 
ON sa.SalesRepID = sr.SalesRepID;

This is okay now

Julian Jaramillo
Julian Jaramillo
7,265 Points
Julian Jaramillo
Julian Jaramillo
7,265 Points

Hey there, I'm using this query, but it tells me I'm missing the IN keyword. Could you please tell me what am I missing? Thanks

Steven Parker
Steven Parker
231,269 Points
Steven Parker
Steven Parker
231,269 Points

Start a fresh question and show your exact code in it. You may want to take a look at this video about Posting a Question.

Laura Dumitru
Laura Dumitru
9,818 Points
Laura Dumitru
Laura Dumitru
9,818 Points

SELECT sa.SaleDate, sa.SaleAmount, sr.FirstName, sr.LastName FROM Sale sa LEFT OUTER JOIN SalesRep sr ON sa.SalesRepID = sr.SalesRepID;

Steven Parker
Steven Parker
231,269 Points
Steven Parker
Steven Parker
231,269 Points

:warning: FYI: According to a moderator, explicit answers without any explanation are strongly discouraged by Treehouse and may be subject to redaction.