Divide By Zero Error Encountered In Mssql
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is no general way of doing it. I'd say your query is just fine. Even if you write your query differently using ISNULL or NULLIF at the end it will likely execute the same. –Nenad Zivkovic Oct 28 '13 at 9:34 As has been pointed out by others, the logic in this CASE statement doesn't quite make sense to us. See my comment on my answer for a brief explanation and then choose whether you want your original answer or mine. My answer would be a more usual solution. –Tom Chantler Oct 28 '13 at 9:40 1 Possible duplicate of How to avoid the "divide by zero" error in SQL? –Henrik Staun Poulsen Mar 10 at 21:06 add a comment| 5 Answers 5 active oldest votes up vote 26 down vote accepted A nicer way of doing this is to use NULLIF like this: Percentage = 100 * ClubTotal / NULLIF(AttTotal, 0) share|improve this answer answered Oct 28 '13 at 9:25 Tom Chantler 11.2k42940 2 This will return NULL if AttTotal = 0, while the query in question returns 0. –Nenad Zivkovic Oct 28 '13 at 9:31 3 @NenadZivkovic - Returning NULL for a divide by zero error probably makes more mathematical sense anyway though. –Martin Smith Oct 28 '13 at 9:34 I agree with @Martin Smith. If you have a situation where the ClubTotal
Using NULLIF() To Prevent Divide-By-Zero Errors In SQL By Ben Nadel on October 3, 2007 Tags: SQL Boyan Kostadinov just sent me
Divide By Zero Error Encountered Ssrs
a cool link to an article that is the final part in tsql divide by zero error encountered a four part series that discusses the SQL NULL value. I haven't read the first three parts yet, msg 8134 level 16 state 1 line 1 divide by zero error encountered but there is a really cool tip in the fourth part on using NULLIF() to prevent divide-by-zero errors in a SQL call.The idea here is that, as with any other http://stackoverflow.com/questions/19631017/simple-way-to-prevent-a-divide-by-zero-error-in-sql form of math that I know of, you cannot divide by zero in a SQL call. Therefore, running this code:
by Zero Using NULLIF Posted on April 5, 2012 by Derek Dieter 1 4 « A Query Method Faster Than BETWEENCreating Unique Random Numbers » Anytime we are dividing we need to think http://sqlserverplanet.com/tsql/overcome-divide-by-zero-using-nullif of the divide by zero scenario. Even if you think you will never http://www.peachpit.com/blogs/blog.aspx?uk=Avoiding-division-by-zero-with-NULLIF-Five-SQL-Tips-in-Five-Days-Part-5- encounter this with your result set, it's advisable to guard against it because when divide by zero is encountered, an error is thrown. The best method I've found to overcome this is by using the NULLIF function. This function takes two parameters and if they are equal, a NULL value is returned. divide by Lets take a look at an example that throws a divide by zero error. DECLARE @iter FLOAT; DECLARE @num FLOAT SET @num = 10; SET @iter = 5; WHILE @iter > -5 BEGIN SELECT @num / @iter SET @iter = @iter - 1 END Running the following query, we see that once the variable @iter becomes zero, we receive an error. divide by zero So the most elegant way to overcome this is to use NULLIF function and compare @iter to zero. When it does equal zero, it will instead change it to a null. And when dividing anything by NULL will equal a NULL. DECLARE @iter FLOAT; DECLARE @num FLOAT; SET @num = 10; SET @iter = 5; WHILE @iter > -5 BEGIN SELECT @num / NULLIF(@iter,0); SET @iter = @iter - 1; END This executes without error, however we still receive a null as a result. If you need otherwise, then you may want to wrap the equation in an ISNULL, to return a different value. DECLARE @iter FLOAT; DECLARE @num FLOAT; SET @num = 10; SET @iter = 5; WHILE @iter > -5 BEGIN SELECT ISNULL(@num / NULLIF(@iter,0),@num); SET @iter = @iter - 1; END This will just return the same number you are dividing by, if you encounter a NULL denominator. Filed under TSQL Related Posts: SQL Server For Each Row Next SQL Server Begin Try Concatenate Rows Using Coalesce Alter Index All Tables How to Concatenate SQL Rank SQL Replace Comp
By Chris FehilyJul 25, 2008 Topics: ProductivitySuppose you want to calculate the male–female ratios for various school clubs, but you discover that the following query fails and issues a divide-by-zero error when it tries to calculate ratio for the Lord of the Rings Club, which has no women: SELECT club_id, males, females, males/females AS ratio FROM school_clubs; You can use the function NULLIF to avoid division by zero. NULLIF compares two expressions and returns null if they are equal or the first expression otherwise. Rewrite the query as: SELECT club_id, males, females, males/NULLIF(females, 0) AS ratio FROM school_clubs; Any number divided by NULL gives NULL, and no error is generated. Be sure to look back over my posts this week for more SQL tips. And for more on SQL, be sure to check out my book SQL: Visual QuickStart Guide, 3rd Edition. Share|Share on twitter Share on facebook Share on google Share on email✉ Other Things You Might LikeData at Work: Best practices for creating effective charts and information graphics in Microsoft Excel By Jorge CamõesBook $35.99Speaker Camp Workshop: Learn by Video By Russ Unger, Samantha StarmerDVD $39.99Windows 8: Visual QuickStart Guide By Barrie SosinskyBook $27.99 View Your Cart Account Sign InSearchSearch View Your Cart 👤 Account Sign In Create AccountTopicsAdobe PhotoshopAppleDesignDigital PhotographyDigital VideoGadgetsProductivity Web Design & Development StoreBookseBooksVideoWeb EditionsAuthorsSafariExploreAbout UsAcademic ResourcesAffiliatesArticlesBlogsNewslettersPressUser GroupsAboutAffiliatesContact UsJobsLegal NoticePrivacy PolicyPressPromotionsSite MapWrite for Us © 2016 Pearson Education, Peachpit. All rights reserved. 1301 Sansome Street, San Francisco, CA 94111