?
Solved

SQL Server Divide columns and handle divide by zero

Posted on 2015-01-25
1
Medium Priority
?
88 Views
Last Modified: 2015-01-25
In SQL Server (2012), I want to divide the values of 2 columns. There are cases where there will be division by zero. I want to do the calculation and handle the division by zero gracefully. A simple example is AB / Hits to get Average. Some AB fields will be zero. Some sort of If statement? If AB = 0, then Average = ".000", else AB/Hits? Thanks for any help.
0
Comment
Question by:dodgerfan
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
 
LVL 18

Accepted Solution

by:
Simon earned 2000 total points
ID: 40569305
Two choices:
1. Use a where clause to exclude the rows with zero denominators.
2. Use a case statement to set the zero denominators to null.

Both demonstrated below...
declare @t1 table (id int,num1 int,num2 int)

insert into @t1
select 1,1,1 union all
select 2,3,2 union all
select 3,0,1 union all
select 4,1,0  union all
select 5,1,null union all
select 6,null,6 

select id,num1,num2,num1/num2 as IntegerDivision,(0.0+num1)/num2 as DecimalDivision 
from @t1 where num2<>0

select id,num1,num2
,cast(num1 as decimal)/case when num2=0 then null else num2 end as DecimalDivision
from @t1

Open in new window

0

Featured Post

On Demand Webinar - Networking for the Cloud Era

This webinar discusses:
-Common barriers companies experience when moving to the cloud
-How SD-WAN changes the way we look at networks
-Best practices customers should employ moving forward with cloud migration
-What happens behind the scenes of SteelConnect’s one-click button

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Ever needed a SQL 2008 Database replicated/mirrored/log shipped on another server but you can't take the downtime inflicted by initial snapshot or disconnect while T-logs are restored or mirror applied? You can use SQL Server Initialize from Backup…
What if you have to shut down the entire Citrix infrastructure for hardware maintenance, software upgrades or "the unknown"? I developed this plan for "the unknown" and hope that it helps you as well. This article explains how to properly shut down …
Via a live example combined with referencing Books Online, show some of the information that can be extracted from the Catalog Views in SQL Server.
Using examples as well as descriptions, and references to Books Online, show the different Recovery Models available in SQL Server and explain, as well as show how full, differential and transaction log backups are performed

765 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question