Creating select statement with seperate columns for different valu

I've been trying to figure out a select statement that would list a seperate
column with the count of a particular value for each value. Basically if I
have a table like this:
number value
-- --
10 good
10 bad
10 bad
12 good
14 bad
16 better
and I want to return all numbers with good or bad values and the totals for
those values, like this:
number good bad
-- -- --
10 1 2
12 1 0
14 0 1
How would I create the query?The best way to query this would be to use:
select num, count(value), value from checkcount
group by num, value
your result would be:
10 2 bad
14 1 bad
16 1 better
10 1 good
12 1 good
then you would want to create a user interface to format your result shown
in your example.
However, if you wanted SQL to bring your result back formatted as your
example, then you would want to inner join your table. hopefully, it is not
a large table. The following query would bring back your desired formatting:
select checkcount.num, isnull( thegood.good ,0) good, isnull( thebad.bad ,0)
bad from checkcount
left join (select num, count(value)as good from checkcount
where value = 'good'
group by num) theGood
on checkcount.num = thegood.num
left join (select num, count(value)as bad from checkcount
where value = 'bad'
group by num) thebad
on checkcount.num = thebad.num
where value in ('good','bad')
group by checkcount.num,thegood.good,thebad.bad
Thanks Kllyj64
"David Tilman" wrote:

> I've been trying to figure out a select statement that would list a sepera
te
> column with the count of a particular value for each value. Basically if I
> have a table like this:
> number value
> -- --
> 10 good
> 10 bad
> 10 bad
> 12 good
> 14 bad
> 16 better
> and I want to return all numbers with good or bad values and the totals fo
r
> those values, like this:
> number good bad
> -- -- --
> 10 1 2
> 12 1 0
> 14 0 1
> How would I create the query?|||If you're lucky enough to have SQL Server 2005, try the new PIVOT operator:
-- DROP TABLE #tmp
CREATE TABLE #tmp ( number INT, xvalue VARCHAR(10) )
SET NOCOUNT ON
INSERT INTO #tmp VALUES ( 10, 'good' )
INSERT INTO #tmp VALUES ( 10, 'bad' )
INSERT INTO #tmp VALUES ( 10, 'bad' )
INSERT INTO #tmp VALUES ( 12, 'good' )
INSERT INTO #tmp VALUES ( 14, 'bad' )
INSERT INTO #tmp VALUES ( 16, 'better' )
SET NOCOUNT OFF
SELECT *
FROM #tmp AS t
PIVOT
(
COUNT(xvalue) FOR xvalue In ( [good], [bad], [better] )
) AS x
That is my first PIVOT query! That's going to be useful!
Let me know how you get on.
Damien
"David Tilman" wrote:

> I've been trying to figure out a select statement that would list a sepera
te
> column with the count of a particular value for each value. Basically if I
> have a table like this:
> number value
> -- --
> 10 good
> 10 bad
> 10 bad
> 12 good
> 14 bad
> 16 better
> and I want to return all numbers with good or bad values and the totals fo
r
> those values, like this:
> number good bad
> -- -- --
> 10 1 2
> 12 1 0
> 14 0 1
> How would I create the query?|||Try,
select
number,
sum(case when value = 'good' then 1 else 0 end) as good,
sum(case when value = 'bad' then 1 else 0 end) as bad
from
t1
group by
number
go
How to rotate a table in SQL Server
http://support.microsoft.com/defaul...574&Product=sql
For SQL Server 2005, see PIVOT operator.
AMB
"David Tilman" wrote:

> I've been trying to figure out a select statement that would list a sepera
te
> column with the count of a particular value for each value. Basically if I
> have a table like this:
> number value
> -- --
> 10 good
> 10 bad
> 10 bad
> 12 good
> 14 bad
> 16 better
> and I want to return all numbers with good or bad values and the totals fo
r
> those values, like this:
> number good bad
> -- -- --
> 10 1 2
> 12 1 0
> 14 0 1
> How would I create the query?