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troubleshooting Question

Avoiding SQL divide by zero exception

Avatar of sundrejser
sundrejser asked on
Microsoft SQL Server
7 Comments1 Solution375 ViewsLast Modified:
I have this stored procedure:

set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE [dbo].[ea_getTop5CPC]
AS
select TOP 5 programId, sum(cpa) as cpa, (convert(float,sum(cpa)) / convert(float,sum(clicks))) as cpc
from
(
 select programId, sum(cpa) as cpa, 0 as clicks
 from ea_Impressions(nolock)
 where impressionDateTime >= dateadd(day,-30,getdate())
 group by programId

union

 select programId, sum(cpa) as cpa, count(*) as clicks
 from ea_Clicks (nolock)
 where clickDateTime >= dateadd(day,-30,getdate())
 group by programId

union

 select programId, sum(cpa) as cpa, 0 as clicks
 from ea_Leads (nolock)
 where leadDateTime >= dateadd(day,-30,getdate())
 group by programId

union

 select programId, sum(cpa) as cpa, 0 as clicks
 from ea_Sales (nolock)
 where saleDateTime >= dateadd(day,-30,getdate())
 group by programId


) tmp group by programId ORDER BY cpa DESC;

In some cases "convert(float,sum(clicks))) " = 0 and a "Divide by zero" error is thrown... How can I change the procedure so cpc is set to 0 when "convert(float,sum(clicks))) " = 0?

Hope someone can help me... Please!
ASKER CERTIFIED SOLUTION
Avatar of Anthony Perkins
Commented:
This problem has been solved!
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