Nested statements using count(*)

Question

Hi!
I have a problem when trying to select rows in one table which occur more than once in another table.
Like this:
Test1
CARTID ------ CUSTOMER
1-----------------Stan
2-----------------Jenny
3-----------------Robert
4-----------------Allen
5-----------------Sara
Test2
CARTID ------ GOODS
1-----------------Sugar
1-----------------Salt
3-----------------Wheat
4-----------------Pepper
4-----------------Pepper
So, I want to select the Customers who have the same goods more than once in their cart. And also add a count of how many instances of the specific goods that are lying in the cart.
CUSTOMER-----------COUNT
4444----------------------2
I have tried something like this without successful result.
SELECT CUSTOMER FROM Test1
WHERE CARTID IN (SELECT CARTID, COUNT(*) TotalCount
FROM Test2
WHERE GOODSID = 'Pepper'
GROUP BY CARTID
HAVING COUNT(*) > 1
ORDER BY COUNT(*) DESC)
Solution, anyone? =)
/Björn

Answer 1

Something like this?
SQL> with test1 as
  2  (
  3  select 1 cart_id, 'Stan' customer from dual
  4  union all
  5  select 2 cart_id, 'Jenny' customer from dual
  6  union all
  7  select 3 cart_id, 'Robert' customer from dual
  8  union all
  9  select 4 cart_id, 'Allen' customer from dual
10  union all
11  select 5 cart_id, 'Sara' customer from dual
12  )
13  , test2 as
14  (
15  select 1 cart_id, 'Sugar' goods from dual
16  union all
17  select 1 cart_id, 'Salt' goods from dual
18  union all
19  select 3 cart_id, 'Wheat' goods from dual
20  union all
21  select 4 cart_id, 'Pepper' goods from dual
22  union all
23  select 4 cart_id, 'Pepper' goods from dual
24  )
25  , test_join as
26  (select test2.cart_id cart_id,
27          test1.customer customer,
28          test2.goods goods,
29          row_number() over (partition by test2.cart_id,
30                                          test2.goods
31                             order by test2.goods) rn,
32          count(test2.goods) over (partition by test2.cart_id,
33                                                test2.goods) cnt
34  from test1,
35       test2
36  where test1.cart_id = test2.cart_id
37  )
38  select cart_id, customer, goods, cnt
39  from test_join
40  where rn = 1
41  /
   CART_ID CUSTOM GOODS         CNT
         1 Stan   Salt            1
         1 Stan   Sugar           1
         3 Robert Wheat           1
         4 Allen  Pepper          2
SQL> Cheers
sarma.