Can't GROUP BY correctly (SQL) - sql

Question

I have an SQL query that currently displays all the people in table HOTEL that booked a hotel between $260 and $350. I'm using ORACLE
SELECT guest.guest_name "GUEST NAME",
Count(guest.guest_no),
guest.guest_no "GUEST NUMBER",
room.r_price "ROOM PRICE"
FROM room,
guest,
booking
WHERE r_price >= 260
AND r_price <= 350
AND guest.guest_no = booking.guest_no
GROUP BY guest.guest_no,
guest.guest_name,
room.room_price
ORDER BY guest.guest_name;
I thought that I could group by just GUEST.GUEST_NAME (so it puts all of the count under the one name rather than doubling up on the guest names).
EDIT: The current results of the query look like this:
GUEST NAME COUNT GUEST_NO R_PRICE
Jenny Freeman 2 G003 260
Jenny Freeman 2 G003 295
Jenny Freeman 2 G003 310
Martin Ferguson 3 G006 260
Martin Ferguson 3 G006 295
Martin Ferguson 3 G006 310
Paul Happy 3 G002 260
Paul Happy 3 G002 295
Paul Happy 3 G002 310
Steve Kirkwood 3 G005 260
Steve Kirkwood 3 G005 295
Steve Kirkwood 3 G005 310
Tina Duncan 2 G001 260
Tina Duncan 2 G001 295
Tina Duncan 2 G001 310
Vanessa Horton 1 G007 260
Vanessa Horton 1 G007 295
Vanessa Horton 1 G007 310
But I'm expecting something like this:
GUEST NAME COUNT GUEST_NO R_PRICE
Jenny Freeman 6 G003 260
Martin Ferguson 9 G006 310
Paul Happy 9 G002 310
Steve Kirkwood 9 G005 260
Tina Duncan 6 G001 310
Vanessa Horton 3 G007 260

Answer 1

Well, I think you just have to change in group by statement rest looks OK to me. Just don't include Room price in Group By statement, i think that is creating problem for you if i am getting your question right...
GROUP BY GUEST.GUEST_NO,
GUEST.GUEST_NAME
and
MAX(R_PRICE)

Answer 2

May be you forgot to join ROOM with BOOKING by ROOM_NO (or other field)?
I've removed ROOM PRICE from group by, query now will will return unique guests and number of rooms they booked with price in given range, and max price for each guest.
SELECT
GUEST.GUEST_NAME "GUEST NAME",
GUEST.GUEST_NO "GUEST NUMBER",
COUNT(*) "CNT",
MAX(R.R_PRICE) "ROOM PRICE"
FROM BOOKING B
inner join ROOM R on R.ROOM_NO = B.ROOM_NO
inner join GUEST G on G.GUEST_NO = B.GUEST_NO
WHERE R.R_PRICE>=260 and R.R_PRICE<=350
GROUP BY G.GUEST_NO, G.GUEST_NAME
ORDER BY G.GUEST_NAME;

Answer 3

You can try the below sql query:
SELECT GUEST.GUEST_NAME "GUEST NAME", COUNT(GUEST.GUEST_NO), GUEST.GUEST_NO "GUEST NUMBER", ROOM.R_PRICE "ROOM PRICE"
FROM ROOM, GUEST,BOOKING
WHERE ROOM.R_PRICE>=260
AND ROOM.R_PRICE<=350
AND GUEST.GUEST_NO = BOOKING.GUEST_NO
GROUP BY GUEST.GUEST_NAME
ORDER BY GUEST.GUEST_NAME;