FIX: Dividing 0 by a Negative Decimal or Numeric Number Results in -0
This article was previously published under Q285544
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BUG #: 203148 (SHILOH_bugs)
When using decimal or numeric data types, if you divide 0 by a negative number, a negative 0 (-0) is returned.
To resolve this problem, obtain the latest service pack for SQL Server 2000. For additional information, click the following article number to view the article in theMicrosoft Knowledge Base:
290211 INF: How to Obtain the Latest SQL Server 2000 Service Pack
Check for 0 before you perform the division and avoid the division if 0 is involved; for example:
declare @v1 dec(10, 2), @v2 dec(2, 1), @v3 dec (10,2) -- @v3 is the result of @v1/@v2select @v1 = 0.0, @v2 = -1.0if @v1 = 0 select @v3 = 0.0else select @v3 = @v1 / @v2
Microsoft has confirmed that this is a problem in SQL Server 2000. This problem was first corrected in SQL Server 2000 Service Pack 1.
SQL Server does not consider the computed value (-0) equal to 0, so the comparison of the computed value (-0) with 0 fails. For example, the following code
Gives the following result:
declare @v1 dec(10, 2), @v2 dec(2, 1) select @v1 = 0.0, @v2 = -1.0 if @v1 / @v2 = 0 print 'equals zero' else print 'not equal zero'
For additional information about related bugs in SQL Server 7.0, click the article number below to view the article in the Microsoft Knowledge Base:
not equal zero
275608 FIX: Mathematical Operations on Numeric or Decimal Columns with Negative Numbers May Return Unexpected Results
Article ID: 285544 - Last Review: 01/16/2015 21:25:15 - Revision: 3.2
Microsoft SQL Server 2000 Standard Edition
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