Having trouble with query

Question

I am trying to query for a report to list aircraft by manufacturer, model name, aircraft number, destinations flown, miler per charter and the total revenue per charter, as well as total amount of revenue generated and total number of mile flown for each aircraft. This is what I have so far, I keep getting stumped when I try to sum I get error that certain lines is not single-group group function.
-----DATA
3 tables:
Aircraft {PK} ac_number
{FK} mod_code
ac_ttaf
ac_ttel
ac_tter
Model {PK} mod_code
mod_manufacturer
mod_name
mod_seats
mod_chg_mile
Charter {PK} char_trip
char_date
{FK2} ac_number
char_destination
char_hours_flown
char_hours_wait
char_fuel_gallons
char_oil_qts
FK1} cus_code
---code written so far--
--program Unit 5 Q4 Reprot of Aircraft By Renvue                         
--author Barbara Forget                                                  
--date February 24.2008                                                  
--purpose to list aircraft by revenue, model, manufacturer and number    
SELECT m.mod_manufacturer "MANUFACTURER",
m.mod_name "A/C NAME",
a.ac_number "A/C #",
c.destination "AIRPORT",
c.char_distance "TOTALMILEAGE"
FROM hartmar.model m,
hartmar.aircraft a,
hartmar.charter c
WHERE m.mod_code = a.mod_code (+)
AND a.ac_number = c.ac_number (+)
ORDER BY m.mod_name
Can someone give me a little input as to how to accomplish this, I get the report as such
MANUFACTURER A/C NAME A/C # AIR TOTALMILEAGE
Piper Axtec 1484P BNA 352
Piper Axtec 1484P STL 508
Piper Axtec 1484P TYS 644
Piper Axtec 1484P STL 472
Piper Axtec 1484P STL 508
Piper Axtec 1484P TYS 644
Piper Axtec 1484P BNA 352
Piper Axtec 1484P STL 472
Piper Axtec 1484P STL 508
Cessna Citation Mustang 1234C
Cessna Citation Sovereign 2345C
MANUFACTURER A/C NAME A/C # AIR TOTALMILEAGE
Beechcraft KingAir 2289L GNV 1645
Beechcraft KingAir 2289L ATL 1023
Beechcraft KingAir 2289L GNV 1645
Beechcraft KingAir 2289L GNV 1574
Beechcraft KingAir 2289L ATL 936
Beechcraft KingAir 2289L ATL 936
Beechcraft KingAir 2289L GNV 1574
Beechcraft KingAir 2289L ATL 1023
Beechcraft KingAir 2289L GNV 1574
Beechcraft KingAir 2289L GNV 1574
Piper Navajo Chieftain 2278V GNV 1574
MANUFACTURER A/C NAME A/C # AIR TOTALMILEAGE
Piper Navajo Chieftain 4278Y TYS 644
Piper Navajo Chieftain 2278V BNA 320
Piper Navajo Chieftain 4278Y GNV 1574
Piper Navajo Chieftain 4278Y GNV 1574
Piper Navajo Chieftain 4278Y STL 472
Piper Navajo Chieftain 2278V GNV 1574
Piper Navajo Chieftain 2278V BNA 320
Piper Navajo Chieftain 4278Y ATL 998
Piper Navajo Chieftain 4278Y TYS 644
Piper Navajo Chieftain 2278V MOB 884
Piper Navajo Chieftain 4278Y TYS 646
MANUFACTURER A/C NAME A/C # AIR TOTALMILEAGE
Piper Navajo Chieftain 4278Y ATL 936
Piper Navajo Chieftain 2278V MQY 312
Piper Navajo Chieftain 2278V MQY 312
Piper Navajo Chieftain 4278Y ATL 936
Piper Navajo Chieftain 4278Y TYS 646
Piper Navajo Chieftain 2278V MOB 884
Piper Navajo Chieftain 4278Y ATL 998
Piper Navajo Chieftain 4278Y STL 472
Piper Navajo Chieftain 4278Y ATL 998
Piper Navajo Chieftain 4278Y GNV 1574
Piper Navajo Chieftain 2278V BNA 320
MANUFACTURER A/C NAME A/C # AIR TOTALMILEAGE
Piper Navajo Chieftain 4278Y TYS 644
Piper Navajo Chieftain 4278Y ATL 936
Piper Navajo Chieftain 4278Y TYS 646
47 rows selected.
but, I need each a/c to be listed once with charter number total miles flown and total revenue generated.
Any suggestions?

Answer 1

Here's what I could fathom:
test@ORA10G>
test@ORA10G> with model as (
  2    select 1 as mod_code, 'Cessna' as mod_manufacturer, 'Citation Mustang' as mod_name, 0.1 as mod_chg_mile from dual union all
  3    select 2,'Piper',     'Axtec',             0.2 from dual union all
  4    select 3,'Piper',     'Navajo Chieftain',  0.3 from dual union all
  5    select 4,'Beechcraft','KingAir',           0.1 from dual union all
  6    select 5,'Cessna',    'Citation Sovereign',0.5 from dual),
  7  aircraft as (
  8    select '1234C' as ac_number, 1 as mod_code from dual union all
  9    select '1484P', 2 from dual union all
10    select '2278V', 3 from dual union all
11    select '2289L', 4 from dual union all
12    select '2345C', 5 from dual union all
13    select '4278Y', 3 from dual),
14  charter as (
15    select 1 as char_trip, '1234C' as ac_number, null as destination, null as char_distance from dual union all
16    select 2, '1484P', 'BNA', 10     from dual union all
17    select 3, '1484P', 'STL', 10     from dual union all
18    select 4, '1484P', 'STL', 20     from dual union all
19    select 5, '1484P', 'TYS', 100    from dual union all
20    select 6, '2278V', 'BNA', 20     from dual union all
21    select 7, '2278V', 'GNV', 30     from dual union all
22    select 8, '2278V', 'MOB', 40     from dual union all
23    select 9, '2278V', 'MQY', 50     from dual union all
24    select 10, '2289L', 'ATL', 10    from dual union all
25    select 11, '2289L', 'ATL', 20    from dual union all
26    select 12, '2289L', 'GNV', 15    from dual union all
27    select 13, '2289L', 'GNV', 25    from dual union all
28    select 14, '2345C',  null, null  from dual union all
29 select 15, '4278Y', 'ATL', 10 from dual union all
30 select 16, '4278Y', 'ATL', 25 from dual union all
31    select 17, '4278Y', 'GNV', 35    from dual union all
32    select 18, '4278Y', 'STL', 20    from dual union all
33    select 19, '4278Y', 'TYS', 40    from dual union all
34    select 20, '4278Y', 'TYS', 50    from dual)
35  --
36  SELECT
37    m.mod_manufacturer as manufacturer,
38    m.mod_name as ac_name,
39    a.ac_number as ac_num,
40    c.destination as airport,
41    sum(c.char_distance) as total_mileage,
42    to_char(sum(c.char_distance*m.mod_chg_mile*0.035),'$99,990.99') as trip_charge
43  FROM
44    model m,
45    aircraft a,
46    charter c
47  WHERE m.mod_code = a.mod_code(+)
48  AND a.ac_number = c.ac_number(+)
49  GROUP BY m.mod_manufacturer,
50           m.mod_name,
51           a.ac_number,
52           c.destination;
MANUFACTUR AC_NAME            AC_NU AIR TOTAL_MILEAGE TRIP_CHARGE
Piper      Axtec              1484P BNA            10       $0.07
Piper      Navajo Chieftain   2278V BNA            20       $0.21
Piper      Navajo Chieftain   2278V MQY            50       $0.53
Piper      Navajo Chieftain   4278Y TYS            90       $0.95
Piper      Navajo Chieftain   4278Y GNV            35       $0.37
Cessna     Citation Mustang   1234C
Piper      Navajo Chieftain   2278V MOB            40       $0.42
Piper      Axtec              1484P STL            30       $0.21
Piper      Axtec              1484P TYS           100       $0.70
Piper      Navajo Chieftain   4278Y STL            20       $0.21
Piper      Navajo Chieftain   2278V GNV            30       $0.32
Beechcraft KingAir            2289L ATL            30       $0.11
Cessna     Citation Sovereign 2345C
Beechcraft KingAir            2289L GNV            40       $0.14
Piper Navajo Chieftain 4278Y ATL 35 $0.37
15 rows selected.
test@ORA10G>
test@ORA10G>Notes:
(1) Lines 29 and 30 (in bold) show that '4278Y', which corresponds to mod_code = 3 i.e. "Piper Navajo Chieftain", flew to ATL twice traveling 10 and 20 miles respectively.
(2) The last line of the resultset (in bold) shows the total miles for "Piper Navajo Chieftain" i.e. 35 miles.
The trip charge, consequently, is 35 miles * 0.3 * 0.035 = 0.3675
where 0.3 is the mod_chg_mile for "Piper Navajo Chieftain".
(3) Note the change in the columns that constitute the GROUP BY clause. What it does is - for every combination of:
    (i)    m.mod_manufacturer
    (ii)   m.mod_name
    (iii)  a.ac_number
    (iv)   c.destinationit sums up the c.char_distance and multiplies it with the product of m.mod_chg_mile and 0.035.
(4) Also note that you can use aggregate functions (sum, in this case) more than once in the SELECT <column_list> part of the query. You need to include the rest of the columns (the 4 above) in the GROUP BY clause.
Hope that helps.
cheers,
pratz