ISNULL and NULLIF are different but related functions. The best tips submitted will receive a cool prize. I would be pissed if my paycheck was 0 because rogue divide by zero nulled it out, but there are instances where division by zero is not a problem -- or Asked: March 05, 2004 - 10:10 am UTC Answered by: Tom Kyte – Last updated: March 30, 2007 - 1:28 pm UTC Category: Database – Version: 8.1.7 Latest Followup You Asked useful reference
[email protected]> select t.*, eval(t.rowid, 't', 'x/y+z' ) from t; X Y Z EVAL(T.ROWID,'T','X/Y+Z') ---------- ---------- ---------- ------------------------- 0 -1 -2 -2 1 0 -1 2 1 0 2 3 2 1 and I would argue THEY ARE decode(x,0,null,x) that would make division by zero (x) NULL. Ivan Mar 25, 2009 at 7:30 AM 1 Comments How about speed between case n nullif Ben Nadel Mar 25, 2009 at 4:43 PM 12,873 Comments @Ivan, I would guess that If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. https://www.bennadel.com/blog/984-using-nullif-to-prevent-divide-by-zero-errors-in-sql.htm
A simple example would be percentage calculation. You should anticipate both situations in your query. regards, Robert. Not really caring that you think this is "inappropriate", it is sort of the way it is done. ...
It is most commonly used for handling the ZERO_DIVIDE exception. Submit your e-mail address below. Also, you sure wouldn't want to divide by zero, since that will cause either a data exception or a null value. Oracle Divide By Null Different database systems offer a range of non-standard functions that are often useful.
The best way to do it is replace the zero with a very small value like 0.00001 EXCEPTION WHEN ZERO_DIVIDE THEN :field2_var := 0.00001; END; Or alternately you can replace the In some cases its better to get some data instead of getting none at all. .... you really do right? additional hints Is there another way to solve this ?
run_query ... Oracle Divide Two Columns chris Jun 28, 2010 at 8:19 PM 1 Comments excellent tip! But admitting to the error is much better than saying "Fix it yourself" "Oracle is doing the right thing" "What did you expect to happen" which is what I see a thanks alex Jan 27, 2011 at 9:36 AM 1 Comments you're my hero!
But what should you do when b is actually a calculated field potentially with its own zero-divide bugs as in: (1+a+b)/(1+c+d/e) Solution 1: Encapsulate each division operation in its own decode A full hour of crunching stopped becuase of a 0 on a single row.. How To Avoid Divide By Zero Error In Oracle [email protected]> [email protected]> insert into t 2 select rownum-1, rownum-2, rownum-3 3 from all_users where rownum <= 5; 5 rows created. Oracle Divide By Zero Exception Would that be fair?
To set a default value, we could use the ISNULL() or COALESCE() functions: