SQL result into 3 bucket by count - sql

Question

=============================
Itemnumber| Check_ind| year
=============================
123 |Y | 2011
456 |Y | 2011
123 |Y | 2012
456 |Y | 2011
456 |Y | 2011
I want to result to be
=====================
1| 2-3| 4
=====================
123| 456 |
I want to count total time that each itemnumber appear in the table and where year=2011, then put it into bucket. my itnitial think was something like :
SELECT case when count(Itemnumber)>=0 and <=1 then '1'
case when count(Itemnumber)>=2 and <=3 then '2-3'
else '4' end
from table where year = '2011'

Answer 1

My guess is maybe there is a better solution using pivot.
While someone find that, here is my solution:
You could handle null with a case to show space if that is a problem.
Sql Fiddle Demo
I include a few more data in the sample, let me know if that is ok.
Have to use FULL JOIN because I don't know what group will have the most items.
.
with item_count AS (
SELECT itemnumber, count(*) as total
FROM item
WHERE year = '2011'
GROUP BY itemnumber
), t_01 AS (
SELECT itemnumber, ROW_NUMBER() OVER(ORDER BY itemnumber) AS row_id
FROM item_count
WHERE total between 0 and 1
), t_02 AS (
SELECT itemnumber, ROW_NUMBER() OVER(ORDER BY itemnumber) AS row_id
FROM item_count
WHERE total between 2 and 3
), t_03 AS (
SELECT itemnumber, ROW_NUMBER() OVER(ORDER BY itemnumber) AS row_id
FROM item_count
WHERE total = 4
)
SELECT t_01.itemnumber as '0-1', t_02.itemnumber as '2-3', t_03.itemnumber as '4'
from
t_01
full join t_02
on t_01.row_id = t_02.row_id
full join t_03
on t_01.row_id = t_03.row_id
I add item 789 and 999 to the data sample

Answer 2

I think this is what you need -
DECLARE #T TABLE ( ItemNumber VARCHAR(5)
,Check_Ind CHAR(1)
,YEAR varchar(4)
)
INSERT INTO #T VALUES ('123','Y','2011')
,('456','Y','2011')
,('123','Y','2012')
,('456','Y','2011')
,('456','Y','2011')
SELECT * FROM #t
SELECT CASE WHEN Count(ItemNumber) < 2 THEN ItemNumber ELSE '' END [0-1]
,CASE WHEN Count(ItemNumber) BETWEEN 2 AND 3 THEN ItemNumber ELSE '' END [2-3]
,CASE WHEN Count(ItemNumber) > 3 THEN ItemNumber ELSE '' END [4]
FROM #T
WHERE YEAR = '2011'
GROUP BY ItemNumber

Answer 3

This question is not well defined so I am somewhat making a guess here. Notice I also am posting ddl and sample data in a consumable format. This makes things a lot easier for the people trying to help.
create table #Something
(
Itemnumber int,
Check_ind char(1),
MyYear int
)
insert #Something
select 123, 'Y', 2011 union all
select 456, 'Y', 2011 union all
select 123, 'Y', 2012 union all
select 456, 'Y', 2011 union all
select 456, 'Y', 2011
--Now add another group for the "2-3" bucket
insert #Something
select 12, 'Y', 2011 union all
select 12, 'Y', 2011;
with GroupSubtotals as
(
select case when COUNT(ItemNumber) < 2 then 1 end as [0-1]
, case when COUNT(ItemNumber) > 1 and COUNT(ItemNumber) < 4 then 1 end as [2-3]
, case when COUNT(ItemNumber) > 3 then 1 end as [4]
from #Something s
where s.MyYear = 2011
group by ItemNumber
)
select SUM([0-1]) as [0-1]
, SUM([2-3]) as [2-3]
, SUM([4]) as [4]
from GroupSubtotals