Microsoft KB Archive/285544

= FIX: Dividing 0 by a Negative Decimal or Numeric Number Results in -0 =

Article ID: 285544

Article Last Modified on 10/16/2003

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APPLIES TO


 * Microsoft SQL Server 2000 Standard Edition

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This article was previously published under Q285544



BUG #: 203148 (SHILOH_bugs)



SYMPTOMS
When using decimal or numeric data types, if you divide 0 by a negative number, a negative 0 (-0) is returned.



RESOLUTION
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 the Microsoft Knowledge Base:

290211 INF: How to Obtain the Latest SQL Server 2000 Service Pack



WORKAROUND
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/@v2 select @v1 = 0.0, @v2 = -1.0 if @v1 = 0 select @v3 = 0.0 else select @v3 = @v1 / @v2



STATUS
Microsoft has confirmed that this is a problem in SQL Server 2000. This problem was first corrected in SQL Server 2000 Service Pack 1.



MORE INFORMATION
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 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' Gives the following result: 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:

275608 FIX: Mathematical Operations on Numeric or Decimal Columns with Negative Numbers May Return Unexpected Results

Keywords: kbbug kbfix kbsqlserv2000sp1fix KB285544

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