Comments on: Handling Division By Zero Scenarios in T-SQL http://www.sqlmusings.com/2009/05/09/handling-division-by-zero-scenarios-in-t-sql/ ramblings, discoveries, tutorials on sql server and other database stuff Wed, 25 Jan 2012 06:55:33 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: Derek http://www.sqlmusings.com/2009/05/09/handling-division-by-zero-scenarios-in-t-sql/comment-page-1/#comment-6049 Derek Tue, 10 Jan 2012 16:19:46 +0000 http://www.sqlmusings.com/?p=725#comment-6049 @Peter North Maybe that's due to the way SQL Server treats (ignores) NULLs when aggregating. @Peter North Maybe that’s due to the way SQL Server treats (ignores) NULLs when aggregating.

]]> By: Pete North http://www.sqlmusings.com/2009/05/09/handling-division-by-zero-scenarios-in-t-sql/comment-page-1/#comment-5888 Pete North Wed, 28 Sep 2011 15:16:10 +0000 http://www.sqlmusings.com/?p=725#comment-5888 None of that works on something like this... (SELECT SUM(Cost) AS Expr1 FROM dbo.qry_367costs AS x WHERE ([Week No] = dbo.qry_367costs.[Week No]) AND (Year = dbo.qry_367costs.Year)) / (SELECT COUNT(TransID) AS Expr1 FROM dbo.qry_sitecISQ AS qry_sitecISQ_2 WHERE (Tinweek = dbo.qry_367costs.[Week No]) AND (Tinyear = dbo.qry_367costs.Year)) AS AvgCPQ None of that works on something like this…

(SELECT SUM(Cost) AS Expr1
FROM dbo.qry_367costs AS x
WHERE ([Week No] = dbo.qry_367costs.[Week No]) AND (Year = dbo.qry_367costs.Year)) /
(SELECT COUNT(TransID) AS Expr1
FROM dbo.qry_sitecISQ AS qry_sitecISQ_2
WHERE (Tinweek = dbo.qry_367costs.[Week No]) AND (Tinyear = dbo.qry_367costs.Year)) AS AvgCPQ

]]> By: Manfred Sorg http://www.sqlmusings.com/2009/05/09/handling-division-by-zero-scenarios-in-t-sql/comment-page-1/#comment-5589 Manfred Sorg Wed, 30 Jun 2010 05:03:59 +0000 http://www.sqlmusings.com/?p=725#comment-5589 These approaches will surely avoid Division by Zero errors - but they do not solve the problem. Usually you should ask yourself why there is a /0-problem. If you have this answer you can query if it is a querying fault (in many cases) or if it happens by design. In the first case you should optimize your query and only in the latter case you should handle the issue by asking you which result you are expecting when the problem occurs. That's when you use the above mentioned techniques. @Gary: If you solved a /0-problem and it's still there you have another one. It can be in the order by clause or somewhere else. It is even possible that a subquery results 0 records while you are expecting more ... These approaches will surely avoid Division by Zero errors – but they do not solve the problem. Usually you should ask yourself why there is a /0-problem. If you have this answer you can query if it is a querying fault (in many cases) or if it happens by design.
In the first case you should optimize your query and only in the latter case you should handle the issue by asking you which result you are expecting when the problem occurs. That’s when you use the above mentioned techniques.
@Gary: If you solved a /0-problem and it’s still there you have another one. It can be in the order by clause or somewhere else. It is even possible that a subquery results 0 records while you are expecting more …

]]> By: Gary http://www.sqlmusings.com/2009/05/09/handling-division-by-zero-scenarios-in-t-sql/comment-page-1/#comment-5560 Gary Wed, 05 May 2010 18:38:14 +0000 http://www.sqlmusings.com/?p=725#comment-5560 I've been searching the net for this kind of solution. While i'm sure your solution works, however, it doesn't seem to work in my situation. My divide by zero occurs in a SQL Server view when i try to find the MOD (remainder) of 2 columns. In very few instances the divisor is 0. By trying to apply the concepts you show i still get the devide by 0 error. Any suggestions for use in a view? I’ve been searching the net for this kind of solution. While i’m sure your solution works, however, it doesn’t seem to work in my situation. My divide by zero occurs in a SQL Server view when i try to find the MOD (remainder) of 2 columns. In very few instances the divisor is 0. By trying to apply the concepts you show i still get the devide by 0 error. Any suggestions for use in a view?

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