I knew about NULLIF() but did not realize dividing by NULL returns NULL (I thought it would be an error). Management is interested in the percentage of zeros out of the total number of cases. Nupur Dave is a social media enthusiast and and an independent consultant. The SQL language "allow" for short cut.
NULLIF() takes two arguments and returns NULL if the two values are the same and can be used to turn the divisor from a zero into a NULL which, in turn, Be sure to look back over my posts this week for more SQL tips. What's surprising is that in SQL Server the following can fail, even though in this case according to standard SQL such a failure would constitute a bug: SELECT * FROM (SELECT SQLAuthority.com x login register about FAQ Site discussion (meta-askssc) [navigation] login register about FAQ Site discussion (meta-askssc) questions tags users badges unanswered ask a question questions tags users best way to
Let's divide Amount by Quantity. If you choose to participate, the online survey will be presented to you when you leave the Msdn Web site.Would you like to participate? BTW, here's another typical example where similar failures can happen: WHERE property_type = 'integer' AND CAST(property_value AS INT) > 10 Here the code can fail due to a covrsion error. Tsql Divide By Zero Error Encountered I am facing a problem.
ELSE ... After you have the annualized number, you divide by the average inventory for the period. We will see two of the most popular methods to overcome this error.Method 1: Use NullIf FunctionHere is the SQL script with NullIf FunctionDECLARE @Var1 FLOAT; DECLARE @Var2 FLOAT; SET @Var1 Browse other questions tagged sql sql-server-2008 tsql sql-server-2005 or ask your own question.
Your solution with nullif() is the correct one. Oracle Sql Divide By Zero If the value of AttTotal or ClubTotal are NULL this will now also return 0. –Martin Smith Oct 28 '13 at 9:25 1 Agree, I like the one by @Dommer, This can be extremely hard to reproduce and debug in a busy live environment. But somehow query optimizer do divide by zero while filtering.
Using the NULLIF and ISNULL functions, your query will look like the following: SELECT ISNULL([Numerator] / NULLIF([Denominator], 0), 0) AS [Percentage] FROM [Table1] What this does is change the denominator into Oct 14, 2010 at 09:30 AM Håkan Winther Good question Fatherjack - I've got CASE statments all through my code because of this. Divide By Zero Error Encountered In Sql Server How does this latch relay work? Divide By Zero Error Encountered Sql Server 2008 total" in case AttTotal is zero: PercentageString := CASE WHEN AttTotal = 0 AND ClubTotal = 0 then '100%' WHEN AttTotal = 0 AND ClubTotal <> 0 THEN 'No att.
Are there any saltwater rivers on Earth? Get More Info Making the initial query a subselect and then doing a GROUP BY on the outer query also changes the results because there is division involved. –Andrew Steitz Mar 1 '13 at Here's the simple function that I wrote. I feel like with every SQL server release, they're just adding more cool stuff. Sql Divide By Zero Error Encountered Nullif
It's an indication that something is fundementally wrong. Loans that change lives — Find out more » Reader Comments Robert Rawlins Oct 3, 2007 at 9:52 AM 54 Comments Niiiiiiiiiiiice!I've had this problem in strange statistics data for a up vote 188 down vote favorite 46 I have this error message: Msg 8134, Level 16, State 1, Line 1 Divide by zero error encountered. useful reference Tenant claims they paid rent in cash and that it was stolen from a mailbox.
share|improve this answer edited Jan 15 '13 at 19:41 Peter Mortensen 10.2k1369107 answered Jan 4 '12 at 12:06 Tobias Domhan 1,4431011 8 Some benchmarks reveal that COALESCE is slightly slower Msg 8134 Level 16 State 1 Line 1 Divide By Zero Error Encountered Oct 14, 2010 at 11:18 AM Ian Roke Do you want to return @int1 if the @int2=0? The operation has to to throw, since the mathematical meaning of x/0 is different from the NULL meaning, so it cannot return NULL.
That's a subtle difference, but it's important...because the next time someone calls your function and expects it to do the right thing, and it does something funky that isn't mathematically correct, Folding Numbers Can someone please explain the way this ability cost is written? However, COALESCE is in the standards so is more portable. –Paul Chernoch Jul 12 '12 at 14:29 16 If someone else doesn't instantly get why this works, NULLIF(d,0) will return Divide By Zero Error Encountered Excel I'm not sure I like it, but it might be useful to know of, some day.
But encountering the nulls prompts the question. I think COALESCE() is more standard than ISNULL(). Returning a null, the answer he eventually comes to, seems like one reasonable reponse. (I was strongly advocating not returning a 0, or some other number.) –Beska Mar 14 '13 at this page The Coalesce replaces the resulting NULL by 0. –GuiSim Apr 16 '14 at 15:59 3 PLEASE!
In that case I wrap whole expression in ISNULL. I would be careful about the ISNULL part, where you end up dividing by NULL. Navigation: Home Projects About Me Contact Jobs ( 6 ) People RSS Ben Nadel at cf.Objective() 2013 (Bloomington, MN) with: Sunil Mendu Using NULLIF() To Prevent Divide-By-Zero Errors In SQL By All content is the property of Ben Nadel and BenNadel.com.
Whenever you encounter a divide by 0 you should ponder if the data should had been NULL instead of 0. –Remus Rusanu May 14 '09 at 18:34 30 I can't 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 Zero Emission Tanks Trying to create safe website where security is handled by the website and not the user Should I serve jury duty when I have no respect for the more ▼ 4 total comments 243 characters / 40 words answered Oct 14, 2010 at 10:24 AM Ian Roke 1.7k ● 32 ● 35 ● 38 I think you meant SELECT
COALESCE is more complex function and capable to accept any number of parameters while isnull/nvl are tailored to replace NULL value from one single column with something different and do it The default is 0, so that's why it didn't work for me at first. Excellent solution! So...
sql sql-server sql-server-2005 sql-server-2008 share|improve this question edited Jan 6 at 19:50 Hooper 4241525 asked May 14 '09 at 6:06 Henrik Staun Poulsen 4,89331220 4 Perhaps some data validation is Reply to this comment Home Tuning Services Featured Articles How to cache stored procedure results using a hash key There are a lot of different design patterns that lend themselves to View All Jobs | Post A Job - Only $29 » ColdFusion Engineer - Enterprise Applications at Market America MEAN Stack Developer at EDU Healthcare Software Development Engineer - REQ20003869 at Its a possibility. +1 Oct 14, 2010 at 11:04 AM Fatherjack ♦♦ Sorry I didn't read the bit where you wanted it to be 1.
In Jason's first query apparently SQL Server decided to evaluate the expression to the right of the AND (the one with the division) before the one to the left (verifying the This is a business rule of how to calculate inventory turns. For any SQL Server Performance Tuning Issue send email at pinal @ sqlauthority.com .