Select multiple results from sub query into single row (as array datatype) - sql

Question

I'm trying to solve a small problem with a SQL query in an oracle database. Let's assume I have these tables:
One table that holds information about cars:
tblCars
ID Model Color
--------------------
1 Volvo Red
2 BMW Blue
3 BMW Green
And another one containing information about drivers:
tblDrivers
ID fID_tblCars Name
---------------------------
1 1 George
2 1 Mike
3 2 Jason
4 2 Paul
5 2 William
6 3 Steve
Now, let's pretend that to find out the popularity of the cars, I want to create reports that contain the data about the cars and the people that are driving them (which seems a very reasonable thing one would accomplish with a database).
This "ReportObject" would have a string for the model, a string for the color and an array (or a list) of strings for the drivers.
Currently, I do this with two queries, in the first I select the cars
SELECT ID, Model, Color FROM tblCars
and create a report object for each result.
Then, I would take each result and get the drivers for each specific car
SELECT Name FROM tblDrivers WHERE fID_tblCars = ResultObject.ID
Basically, step one gives me a resulting data set that looks like this:
Result
------------------------------------------
ColumnID ColumnModel ColumnColor
Type Integer Type String Type String
and now, if I will have more cars in the future, I will have to make a lot of additional queries, one for each row in the resulting table.
When I try this:
SELECT Model, Color, (SELECT Name FROM tblDrivers WHERE tblDrivers.fID_tblCars = tblCars.ID) as Name FROM tblCars
I get some error message telling me that one result in the row contains multiple elements (which is what I want!).
I want the result to look like this:
Result
--------------------------------------------------------
ColumnID ColumnModel ColumnColor ColumnName
Type Integer Type String Type String Type Array
So when I build my report object, I could do something like this:
foreach (var Row in Results)
{
ReportObject.Model = Row.Model;
ReportObject.Color = Row.Color;
foreach (string Driver in Row.Name)
{
ReportObject.Drivers.Add(Driver);
}
}
Am I completely missing my basics here or do I have to split this up in multiple queries?
Thanks!

Answer 1

This works in Oracle. In the SQL Fiddle example I couldn't get the IDENTITY or the PRIMARY KEYS to work when creating the table (never used Oracle SQL before)
SELECT c.id,
c.model,
c.color,
LISTAGG(d.name, ',') WITHIN GROUP (ORDER BY d.name) AS "Drivers"
FROM tblCars c
JOIN tblDrivers d
ON c.id = d.fID_TblCars
GROUP BY c.id,
c.model,
c.color
ORDER BY c.Id
SQL Fiddle Example