Min except for zero

We have a complex query with many aggregate functions.
For one column where we return MIN, we would like to return the minimum
non-zero value.
I don't think using HAVING is going to work, because we don't want to
exclude any rows from the result set.
We're thinking of doing something like MIN(case...) but haven't found
something
that works.
An example:
TAB1
NUM1 NUM2
3 0
5 1
7 2
We want to select MAX(NUM1) and MIN(NUM2) and get 7 and 1 as the result.Try
MIN(CASE WHEN NUM2 <> 0 THEN NUM2 END)
or
MIN(NULLIF(NUM2,0))
Steve Kass
Drew University
jhcorey@.yahoo.com wrote:

>We have a complex query with many aggregate functions.
>For one column where we return MIN, we would like to return the minimum
>non-zero value.
>I don't think using HAVING is going to work, because we don't want to
>exclude any rows from the result set.
>We're thinking of doing something like MIN(case...) but haven't found
>something
>that works.
>An example:
>TAB1
>NUM1 NUM2
>3 0
>5 1
>7 2
>
>We want to select MAX(NUM1) and MIN(NUM2) and get 7 and 1 as the result.
>
>|||One way is to use CASE to convert the 0s to NULL:
SELECT MAX(a), MIN(CASE b WHEN 0 THEN NULL ELSE b END) AS b
FROM
(
SELECT 3 AS a, 0 AS b
UNION
SELECT 5, 1
UNION
SELECT 7, 2
) AS i
Tibor Karaszi, SQL Server MVP
http://www.karaszi.com/sqlserver/default.asp
http://www.solidqualitylearning.com/
<jhcorey@.yahoo.com> wrote in message news:1108483393.537431.133510@.c13g2000cwb.googlegroups
.com...
> We have a complex query with many aggregate functions.
> For one column where we return MIN, we would like to return the minimum
> non-zero value.
> I don't think using HAVING is going to work, because we don't want to
> exclude any rows from the result set.
> We're thinking of doing something like MIN(case...) but haven't found
> something
> that works.
> An example:
> TAB1
> NUM1 NUM2
> 3 0
> 5 1
> 7 2
>
> We want to select MAX(NUM1) and MIN(NUM2) and get 7 and 1 as the result.
>|||Correction,
select max(num1), min(case when num2 > 0 then num2 else null end) from tab1
go
AMB
"Alejandro Mesa" wrote:
> You are in the correct path. Try:
> select max(num1), min(case when num2 > 2 then num2 else null end) from tab
1
> go
>
> AMB
> "jhcorey@.yahoo.com" wrote:
>|||You are in the correct path. Try:
select max(num1), min(case when num2 > 2 then num2 else null end) from tab1
go
AMB
"jhcorey@.yahoo.com" wrote:

> We have a complex query with many aggregate functions.
> For one column where we return MIN, we would like to return the minimum
> non-zero value.
> I don't think using HAVING is going to work, because we don't want to
> exclude any rows from the result set.
> We're thinking of doing something like MIN(case...) but haven't found
> something
> that works.
> An example:
> TAB1
> NUM1 NUM2
> 3 0
> 5 1
> 7 2
>
> We want to select MAX(NUM1) and MIN(NUM2) and get 7 and 1 as the result.
>|||Hi
WHERE (Num1 > 0 OR Num2 > 0)
Regards
Mike
"jhcorey@.yahoo.com" wrote:

> We have a complex query with many aggregate functions.
> For one column where we return MIN, we would like to return the minimum
> non-zero value.
> I don't think using HAVING is going to work, because we don't want to
> exclude any rows from the result set.
> We're thinking of doing something like MIN(case...) but haven't found
> something
> that works.
> An example:
> TAB1
> NUM1 NUM2
> 3 0
> 5 1
> 7 2
>
> We want to select MAX(NUM1) and MIN(NUM2) and get 7 and 1 as the result.
>|||MIN(NULLIF(num2,0))
David Portas
SQL Server MVP
--|||Whew, that was quick!
Thanks to all.
As a note, I was trying this in the Northwind database and
having some difficulty (all values are decimals between 0 and 1):
select max(discount),min(discount),min(case when discount = 0 then null
else discount end) from [order details]
Jim