Extract Numbers and count their times

Question

Oracle 10.2.0.1
Windows xp
Table1 is having below data :
Region  Region_Name   Sales_Allowed (This is also codes of region)
01      R1            26,19,30,04,10,20
02      R2            15,18,01,34,30,10,26,50
03      R3            45,80,12,02,01,48,77
04      R4            11,22,50,26,19,06,45
05      R5
80      R80           12,13,14,15,77Total 80 regions and maximum sales_allowed is 20 regions; i mean there can not be more than 20 regions in a region where sales is allowed.
My requirements :
1.Which region is having highest Sales_allowed. In the above example 02 is having maximum
regions in it.
2.If i wish to know that how many times RegionN is coming in the table as sales_allowed, something like in the above example 26 is coming 3 times (in 01,02 and in 04), may be other region is coming 10 times in different rows; so i want something like :
Output based on above example please:
Region    Times
01        0
02        1
03        0
04        1
05        0
06        1
26        3
..        <N>I am sure, this question is in the forum, but not finding the exact/near solution....
Thank you.

Answer 1

Or is it more like this?
SQL> ed
Wrote file afiedt.buf
  1  with t as (select '01' as Region, 'R1' as Region_Name, '26,19,30,04,10,20' as Sales_Allowed from dual union all
  2             select '02', 'R2', '15,18,01,34,30,10,26,50' from dual union all
  3             select '03', 'R3', '45,80,12,02,01,48,77' from dual union all
  4             select '04', 'R4', '11,22,50,26,19,06,45' from dual union all
  5             select '80', 'R80', '12,13,14,15,77' from dual)
  6  --
  7  -- END OF TEST DATA
  8  --
  9  select x.rn as region, nvl(y.cnt,0) as cnt
10  from   (select rownum rn from dual connect by rownum <= 80) x
11         left outer join
12         (select regexp_substr(sales_allowed,'[^,]+',1,rn) as region, count(*) as cnt
13          from   t cross join (select rownum rn from dual connect by rownum <= 20)
14          where regexp_substr(sales_allowed,'[^,]+',1,rn) is not null
15          group by regexp_substr(sales_allowed,'[^,]+',1,rn)
16         ) y
17         on (x.rn = to_number(y.region))
18* order by 1
SQL> /
    REGION        CNT
         1          2
         2          1
         3          0
         4          1
         5          0
         6          1
         7          0
         8          0
         9          0
        10          2
        11          1
        12          2
        13          1
        14          1
        15          2
        16          0
        17          0
        18          1
        19          2
        20          1
        21          0
        22          1
        23          0
        24          0
        25          0
        26          3
        27          0
        28          0
        29          0
        30          2
        31          0
        32          0
        33          0
        34          1
        35          0
        36          0
        37          0
        38          0
        39          0
        40          0
        41          0
        42          0
        43          0
        44          0
        45          2
        46          0
        47          0
        48          1
        49          0
        50          2
        51          0
        52          0
        53          0
        54          0
        55          0
        56          0
        57          0
        58          0
        59          0
        60          0
        61          0
        62          0
        63          0
        64          0
        65          0
        66          0
        67          0
        68          0
        69          0
        70          0
        71          0
        72          0
        73          0
        74          0
        75          0
        76          0
        77          2
        78          0
        79          0
        80          1
80 rows selected.
SQL>