Question

I’m having a few problems creating a SQL Query.

I have the following tables:

**Tour**
tourID
tourName

**Schedule**
scheduleID
tourID

**Ticket**
scheduleID
customerID

And what I want to select is the tourname and the number of tickets sold per tour. I know how to select the number of tickets sold by schedule but I’m stuck getting it linked to the tour.

Number of tickets per schedule:

SELECT t.scheduleID, COUNT(t.scheduleID) AS numTickets
FROM Ticket t
GROUP BY t.scheduleID

Appreciate the help

Answer 1

Try this:

Select t.tourname, COUNT(tc.scheduleID) AS numTickets
From Tour t 
inner join Schedule s on t.tourID = s.tourID
inner join Ticket   tc on s.scheduleID = tc.scheduleID
group by t.tourID, t.tourname