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Rounding problem in SQL 2005

Posted on 2008-06-18
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Last Modified: 2010-03-19
I have data for a particular row. the value as shown when i open the table is 0.02222499999999999998 and when i execute a query in the SQL management studio, the value returned is 0.022225. how can i make the query return the exact data in the table and not the rounded value.
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Question by:jealanish
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by:rickchild
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I am sure someone will come in with a better solution, but see this:

http://www.codeproject.com/KB/database/Formatting_in_SQL.aspx
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by:jealanish
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It does not really help me as the value that is retrieved is 0.022225 and so whatever operation you do is based on this. i see the value as 0.02222499999999999998 in the table.  lets say i have a table expt in which i have two columns one is name of type varchar2 and the other is floatvalue of type float. insert into expt values('jealani' , 0.02222499999999999998). now when i execute the query 'Select * from expt". i need to see "Jealani   0.02222499999999999998 " as the output. i need the exact value what i see in the table in the table view mode.
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by:Mark Wills
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Sounds like you are using a float. which is an approximation to the real value. Make sure your datatype is either REAL or FLOAT when retrieving, or if decimal, has sufficent scale to accommodate such as decimal(24,18). When using float, some of the views like tableview will attempt to round back. Better if possible to use a high scaled number rather than the numerical approximation of a float column...
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Accepted Solution

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Guy Hengel [angelIII / a3] earned 250 total points
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just to show the "behaviour":
set nocount on

declare @i1 float

declare @i2 float

declare @f float
 

set @i1 = 1

set @i2 = 3

set @f = @i1/@i2
 

select @f f 

select cast(@f as varchar(1000)) v

select cast(@f as decimal(20,18)) d
 

returns:
 

                     f

----------------------

     0,333333333333333
 

v

----------------------------------------------

0.333333
 

                                      d

---------------------------------------

                   0.333333333333333310

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