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Databases

Alain De La Cuadra
Alain De La Cuadra
21,890 Points
Posted by Alain De La Cuadra
Alain De La Cuadra
21,890 Points

In a car database there is a Model table with columns, ModelID, MakeID and ModelName and a Car table with columns, CarID

cant get the VIN nr

2 Answers

Don Ricardo JR
Don Ricardo JR
9,000 Points

I got this to work:

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

I have a hard time understanding how it works as it seems I'm selecting VIN from MODEL, though... must be because of the left outer join. from the cheatsheet: "LEFT OUTER JOIN - JOINs all matching data and all non-matching rows from the left table in the query."

Ex. SELECT <columns> FROM <left table> LEFT OUTER JOIN <right right> ON <left table>.<column> = <right table>.<column>;

https://github.com/treehouse/cheatsheets/blob/master/querying_relational_databases/cheatsheet.md