Division by Zero Error

I am getting a division by zero error from the SQL below, I believe I need to utilize Cast because it could be a negative number and I need to be able to view 8 positions to the right of the dec. (0000.00000000). Any help would be greatly appreciated.

SELECT FromDate AS MonthOneDate,State,Description,SUM(Flowthru) AS CELCSumFT,SUM(TotalCount) AS CELCsumCNT,
(SUM(Flowthru)/SUM(TotalCount)) * 100 AS CELCFtPct,
RetailNum AS ARZSumFT,RetailDen AS
ARZSumCnt,(RetailNum/RetailDen) * 100 AS ARZFtPct,
((RetailNum/RetailDen) - SUM(Flowthru) /SUM(TotalCount)) / SQRT(((SUM(Flowthru) + RetailNum) / (SUM(TotalCount) +RetailDen)) * (1-(SUM(Flowthru)+RetailNum)/(SUM(TotalCount) + RetailDen)) * (1 / SUM(TotalCount)+1/RetailDen)) AS ZScoreMonth1
FROM pmMidwest33_BlueRed WHERE TotalCount <> 0 AND CLEC <>
'' AND Acna NOT IN ('TRE','TRD') AND STATE IN ('IL','IZ','TR','MI','RE')
AND MONTH(FromDate) = MONTH(DATEADD(m,-2,GETDATE()))
AND YEAR(FROMDATE) = YEAR(DATEADD(m,-2,GETDATE()))
GROUP BY FromDate,State,Description,RetailNum,RetailDenDid you figure what part of your SQL query returns a divide by zero ? It could be :

sum(TotalCount),
RetailDen,
SQRT(((SUM(Flowthru) + RetailNum)
...

Before casting anything, I would look for the origin of the problem.|||for example you have

select (SUM(Flowthru)/SUM(TotalCount)) * 100 AS CELCFtPct from table

select CELCFtPct = case when SUM(TotalCount)) = 0 then 0
else (SUM(Flowthru)/SUM(TotalCount)) * 100 end
from table

You can do that for all your divisions so you do not get division by zero error. Not sure what field you needed this on but its a good ideal to do this anytime that you are dividing because at some point you are bound to divide by zero.

Hope that helps

KG|||Thank you for your help.. I figured out that my data types needed to be changed to float. I had it a varchar.

Joe

divide INT get decimal output

I have written the following query and even though I used CAST if the
number is less then 1 it show up as 0. Here is the query:

select cast(count(SafetyTrainingYN) AS FLOAT)
from ICPCDATA
where SafetyTrainingYN = 1 /
(select count(SafetyTrainingYN)
from ICPCDATA)

Any help would be much appreciated.

Thanks,

jp

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*** Sent via Developersdex http://www.developersdex.com ***
Don't just participate in USENET...get rewarded for it!Josh, is this what you're after?

SELECT
(SELECT CAST(COUNT(*) AS FLOAT)
FROM ICPCDATA
WHERE SafetyTrainingYN=1) /
(SELECT COUNT(SafetyTrainingYN)
FROM ICPCDATA)
AS PercentYes

In your query, you're looking for the count of rows where SafetyTrainingYN
is equal to the fraction 1/count(...) (zero when the table has more than 1
row due to integer division).

Hope that helps,
Rich

"Josh Phillips" <phillips3_nospam_@.hotmail.com> wrote in message
news:40914d9e$0$203$75868355@.news.frii.net...
> I have written the following query and even though I used CAST if the
> number is less then 1 it show up as 0. Here is the query:
> select cast(count(SafetyTrainingYN) AS FLOAT)
> from ICPCDATA
> where SafetyTrainingYN = 1 /
> (select count(SafetyTrainingYN)
> from ICPCDATA)
> Any help would be much appreciated.
> Thanks,
> jp
>
> remove _nospam_ for my email
> *** Sent via Developersdex http://www.developersdex.com ***
> Don't just participate in USENET...get rewarded for it!

Divide by zero error trapping

I have the following line in a select statement which comes up with a
divide by zero error.

CAST(CASE Splinter_Status
WHEN 'SUR' THEN 0
ELSE CASE WHEN Sacrifice>=1
THEN 3*m.Premium/100-(m.Sacrifice * 3*m.Premium/100)/
(m.Gross+m.Sacrifice)
ELSE 0
END
END AS Float)AS Bond2,

The error happens on the section (m.Gross + m.Sacrifice) as this can
equal zero and throws out the part of the calc that divides by it. It
is correct in some instances that it does so. The full SQL statement
has a large number of these expressions so I need a method I can apply
to any line if possible.

I know that it is mathmatically correct to error where this value is
zero, but what I want to do is set the output of the entire expression
to zero if there is an error.

Realistically an error such as this could happen at a few points in
the expression (or one of many others), so I need to find a way of
catching any error in the expression and setting the return value to
0. I thought of using a CASE statement, but wondered if there was a
better way of looking at this as the case statement would have to
check each variation where it could throw an error.

Any ideas ?

Thanks

RyanRyan (ryanofford@.hotmail.com) writes:
> I have the following line in a select statement which comes up with a
> divide by zero error.
> CAST(CASE Splinter_Status
> WHEN 'SUR' THEN 0
> ELSE CASE WHEN Sacrifice>=1
> THEN 3*m.Premium/100-(m.Sacrifice * 3*m.Premium/100)/
> (m.Gross+m.Sacrifice)
> ELSE 0
> END
> END AS Float)AS Bond2,
> The error happens on the section (m.Gross + m.Sacrifice) as this can
> equal zero and throws out the part of the calc that divides by it. It
> is correct in some instances that it does so. The full SQL statement
> has a large number of these expressions so I need a method I can apply
> to any line if possible.
> I know that it is mathmatically correct to error where this value is
> zero, but what I want to do is set the output of the entire expression
> to zero if there is an error.

SQL Server does happen to other some alternatives in this case, but I would
strongly recomment that you have something like:

ELSE CASE WHEN Sacrifice>=1 AND m.Gross+m.Sacrifice <> 0
THEN 3*m.Premium/100-(m.Sacrifice * 3*m.Premium/100)/
(m.Gross+m.Sacrifice)
ELSE 0
END

The alternatives is to set ANSI_WARNINGS OFF, ARITHABORT OFF and
ARITHIGNORE ON. In this case, SQL Server will silenly set the result to
NULL, which you then would have to apply coalesce to get a 0. But since
these settings are not compatible with indexed views and indexed
computed columns, you can get other problems, and overall it is, in
my opinion, an obscure way of doing things.

--
Erland Sommarskog, SQL Server MVP, esquel@.sommarskog.se

Books Online for SQL Server SP3 at
http://www.microsoft.com/sql/techin.../2000/books.asp|||Probably the easiest way to accomplish what is you is:

CAST(CASE Splinter_Status
WHEN 'SUR' THEN 0
ELSE CASE WHEN Sacrifice>=1
THEN COALESCE(( 3*m.Premium/100-(m.Sacrifice *
3*m.Premium/100)/
NULLIF(m.Gross+m.Sacrifice,0) ),0)
ELSE 0
END
END AS Float)AS Bond2,

Hope this helps,
Gert-Jan

Ryan wrote:
> I have the following line in a select statement which comes up with a
> divide by zero error.
> CAST(CASE Splinter_Status
> WHEN 'SUR' THEN 0
> ELSE CASE WHEN Sacrifice>=1
> THEN 3*m.Premium/100-(m.Sacrifice * 3*m.Premium/100)/
> (m.Gross+m.Sacrifice)
> ELSE 0
> END
> END AS Float)AS Bond2,
> The error happens on the section (m.Gross + m.Sacrifice) as this can
> equal zero and throws out the part of the calc that divides by it. It
> is correct in some instances that it does so. The full SQL statement
> has a large number of these expressions so I need a method I can apply
> to any line if possible.
> I know that it is mathmatically correct to error where this value is
> zero, but what I want to do is set the output of the entire expression
> to zero if there is an error.
> Realistically an error such as this could happen at a few points in
> the expression (or one of many others), so I need to find a way of
> catching any error in the expression and setting the return value to
> 0. I thought of using a CASE statement, but wondered if there was a
> better way of looking at this as the case statement would have to
> check each variation where it could throw an error.
> Any ideas ?
> Thanks
> Ryan

--
(Please reply only to the newsgroup)|||Works perfectly thank you !

R

Gert-Jan Strik <sorry@.toomuchspamalready.nl> wrote in message news:<41251949.4D0CF7B3@.toomuchspamalready.nl>...
> Probably the easiest way to accomplish what is you is:
> CAST(CASE Splinter_Status
> WHEN 'SUR' THEN 0
> ELSE CASE WHEN Sacrifice>=1
> THEN COALESCE(( 3*m.Premium/100-(m.Sacrifice *
> 3*m.Premium/100)/
> NULLIF(m.Gross+m.Sacrifice,0) ),0)
> ELSE 0
> END
> END AS Float)AS Bond2,
> Hope this helps,
> Gert-Jan
>
> Ryan wrote:
> > I have the following line in a select statement which comes up with a
> > divide by zero error.
> > CAST(CASE Splinter_Status
> > WHEN 'SUR' THEN 0
> > ELSE CASE WHEN Sacrifice>=1
> > THEN 3*m.Premium/100-(m.Sacrifice * 3*m.Premium/100)/
> > (m.Gross+m.Sacrifice)
> > ELSE 0
> > END
> > END AS Float)AS Bond2,
> > The error happens on the section (m.Gross + m.Sacrifice) as this can
> > equal zero and throws out the part of the calc that divides by it. It
> > is correct in some instances that it does so. The full SQL statement
> > has a large number of these expressions so I need a method I can apply
> > to any line if possible.
> > I know that it is mathmatically correct to error where this value is
> > zero, but what I want to do is set the output of the entire expression
> > to zero if there is an error.
> > Realistically an error such as this could happen at a few points in
> > the expression (or one of many others), so I need to find a way of
> > catching any error in the expression and setting the return value to
> > 0. I thought of using a CASE statement, but wondered if there was a
> > better way of looking at this as the case statement would have to
> > check each variation where it could throw an error.
> > Any ideas ?
> > Thanks
> > Ryan