Morning Olaf,

I may not be understanding exactly what you want, but I'll try:

To get the count or rows for field_name A, B, C ... you would use this:

select field_name,count(*) as kount
from table_name
group by field_name;

This would give something like this for your example:

FIELD_NAME KOUNT
-----------------
A 100
C 30
B 50

To get the field_name where the count is lowest, you would do this:

with whatever as
(select field_name,count(*) as kount
from table_name
group by field_name)
select field_name from whatever
where kount = (select min(kount) from whatever);

The result would be as follows for your example:

FIELD_NAME
----------
C

However, consider this example:

FIELD_NAME KOUNT
-----------------
A 100
C 30
B 50
D 30

The result would now be:

FIELD_NAME
----------
C
D

How would you choose which one is "correct" - both have the same count.


HTH

Cheers,
Norm.

Norman Dunbar
Contract Senior Oracle DBA
Capgemini Database Team (EA)
Internal : 7 28 2051
External : 0113 231 2051


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