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Databases

Posted by Charlie Harcourt
Charlie Harcourt
8,046 Points

Why does this code work in SQL?

Select Model.ModelName, Car.VIN from Model left outer join Car on Car.Modelid = Model.ModelID left outer join Make on Model.MakeID = Make.MakeID;

This code works but I am wondering if anyone can explain why it works and where does the Make come into this

Here is a link to the question: https://teamtreehouse.com/library/querying-relational-databases/joining-table-data-with-sql/join-queries

It is challenge 4.

1 Answer

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

Most likely, the database used to test the tasks is the same, even if some questions don't need all of the tables.

Clearly this question could have been answered with a single join, but the extra one did not affect the output so it still passed the challenge.