Can Anyone Help With With Datatype Float
Aug 30, 2007
I have some engineering data in my table and the db designer is representing it with a float datatype. Here's what is happening. If I query on a record based on id num and get a row and put it in text boxes in my Windows App, min_riv_hd_dia (the float) is 0.026<14 zeroes>2. If I try to query and get that same record again but this time based on id num and min_riv_hd_dia equal to 0.026<14 zeroes>2, I get no row found. If I just do a select on this row based on id number, sql server displays it as 0.026. But if I query with 0.026 as my value, still the row is not found. If I query min_riv_hd_dia > 0.026, the record is found.
So my question is, how can I tell the exact value that must be input in my search criteria in order to find this row?
Thank you so much if you can help!
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Apr 9, 2007
I can't take full credit for this. I want to share this with Jeff Moden who did the important research for this calculation here.
All I did was just adapting some old code according to the mantissa finding Jeff made and optimized it a little
Some test codeDECLARE@SomeNumber FLOAT,
@BinFloat BINARY(8)
SELECT@SomeNumber = -185.6125,
@BinFloat = CAST(@SomeNumber AS BINARY(8))
SELECT@SomeNumber AS [Original],
CAST(@SomeNumber AS BINARY(8)) AS [Binary],
dbo.fnBinaryFloat2Float(CAST(@SomeNumber AS BINARY(8))) AS [Converted],
@SomeNumber - dbo.fnBinaryFloat2Float(CAST(@SomeNumber AS BINARY(8))) AS [Error]
And here is the code for the function.CREATE FUNCTION dbo.fnBinaryFloat2Float
(
@BinaryFloat BINARY(8)
)
RETURNS FLOAT
AS
BEGIN
DECLARE@Part TINYINT,
@PartValue TINYINT,
@Mask TINYINT,
@Mantissa FLOAT,
@Exponent SMALLINT,
@Bit TINYINT,
@Ln2 FLOAT,
@BigValue BIGINT
SELECT@Part = 1,
@Mantissa = 1,
@Bit = 1,
@Ln2 = LOG(2),
@BigValue = CAST(@BinaryFloat AS BIGINT),
@Exponent = (@BigValue & 0x7ff0000000000000) / EXP(52 * @Ln2)
WHILE @Part <= 8
BEGIN
SELECT@Part = @Part + 1,
@PartValue = CAST(SUBSTRING(@BinaryFloat, @Part, 1) AS TINYINT),
@Mask =CASE WHEN @Part = 2 THEN 8 ELSE 128 END
WHILE @Mask > 0
BEGIN
IF @PartValue & @Mask > 0
SET @Mantissa = @Mantissa + EXP(-@Bit * @Ln2)
SELECT@Bit = @Bit + 1,
@Mask = @Mask / 2
END
END
RETURNSIGN(@BigValue) * @Mantissa * POWER(CAST(2 AS FLOAT), @Exponent - 1023)
END
Thanks again Jeff!
Peter Larsson
Helsingborg, Sweden
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Apr 5, 2000
For example, I have a float datatype field with a value of .2501
I select using ROUND(Field,3) and get .25 as a result, but what I need to display is .250 (three decimal places.) How can this be done?
Thanks,
Paul
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Feb 12, 2014
I'm using this query to sum the values. The cost column is a float datatype and what could I differently do here to sum the cost. I'm unable to sum the cost.
Also is there any way I change the datatype to int for Cost column without losing the data.
select ID, MAX(Date) Date, SUM(Cost) Cost, MAX(Funding) Funding from Application
group by ID
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May 16, 2008
Hi,
how to convert nvarchar datatype to float?
Regards
Prashant
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Sep 25, 2006
I am using sql express 2005 and sql server 2005 with C# 2.0.
I am a bit confused about which data type i should be using for several fields.
Right now I am declaring all of my fields in sql server as float for everything except for money fields which are using money.
When loaded into C# these fields are converted to double and decimal because C# does not have a float datatype.
Should I be using Decimal or Double for everything instead?
Here are a few examples
QtyInvoiced (float) - holds the number of items invoice
possible values look like this 1.0, 1.25 or 1.5
PercentDiscount (float) - holds a percentage
possible values look like this
10.25, 20.50, 50.00
I appreciate the help.
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Aug 3, 2006
In SQL Server for a field of datatype float(8),
if i insert a value 2.62 , it saves it as 2.6200000000000001
like so for other values also.
But in frontend i can see the right values.
Could any of you help me in fixing up this issue?
Thanks in advance.
~ chaitanya
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Sep 10, 2007
Hi,
I have a excel file and i am trying to import zip codes to the database... but the some of the zip codes start with 06902 but the excel file treats them as float but i want to treat them as varchar...
How can i do it.
Regards
Karen
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Aug 3, 2006
Hi,
When i try to insert a value in to a field of datatype float(8), it is storing the wrong values(approximate values).
For example, if i try to insert 2.62 , it takes it as 2.6200000000000001
But i can see the correct values displayed in the frontend.
Heard that there is a fix available for this issue.
Could any of you help me in getting the details about that fix?
Thanks in advance.
~ Chaitanya
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Jan 16, 2013
What is the difference between Money and (Float or Decimal) Datatype. If we use Float or Decimal instead of Money, will we loose any functions..?
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Aug 22, 2006
I have this problem of inserting my query into database field. My code is as of below.
The @AVERAGESCORE parameter is derived from
Dim averagescore As Single = (122 * 1 + 159 * 2 + 18 * 3 + 3 * 4 + 0 * 5) / (122 + 159 + 18 + 3 + 0)
and the value returned is (averagescore.toString("0.00"))
However, I have error inserting the averagescore variable into a field of datatype float during the transaction. I have no problems when using non transactional sql insert methods. What could be the problem?
Try
Dim i As Integer
For i = 0 To arraySql.Count - 1
myCommand = New SqlCommand
Dim consolidatedobjitem As ConsolidatedObjItem = arraySql(i)
myCommand.CommandText = sqlStr
myCommand.Connection = myConnection
myCommand.Transaction = myTrans
With myCommand.Parameters
.Add(New SqlParameter("@AVERAGESCORE", consolidatedobjitem.getaveragescore))
End With
myCommand.ExecuteNonQuery()
Next
myTrans.Commit()
myConnection.Close()
Catch ex As Exception
Console.Write(ex.Message)
myTrans.Rollback()
myConnection.Close()
End Try
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Jan 28, 2015
Need to know if the varchar datatype field will ingore leading zeros when compared with numeric datatype ?
create table #temp
(
code varchar(4) null,
id int not null
)
insert into #temp
[Code] .....
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Apr 24, 2008
Good afternoon,
I have an issue with an ssis variable datatype.
The scenario is as follows:
I have a stored procedure:
PROCEDURE [dbo].[sp_newTransaction]
@sourceSystem varchar(50),
@txOut NUMERIC(18,0) OUTPUT
AS
insert into scn_transaction (sourceSystemName) values(@sourceSystem);
SELECT @txOut = @@identity
Whose purpose is to perform an insert into a table and return me the identity value of the inserted record, which I'll then use throughout the rest of my package. The identity column in the inserted table is numeric(18,0).
I execute the stored proc with the following sql with an OLE DB connection manager:
exec sp_newTransaction ?, ?
The first parameter is a string variable from earlier in the package, and the second is the output parameter. I have the following parameter mappings to the execute sql task:
User:ystxId output numeric 1 -1
User:ourceSys input varchar 0 -1
The proc is correctly called, and the row insesrted, however I get a type conversion error when SSIS attempts to map the return parameter to my package variable... I've tried all sorts of combonations, and can't seem to get it to execute.
At one point I wasn't returning a numeric, but rather an int from the stored proc, and all was well until I went to use the variable in a derived column later in the package, and the type was converted quite incorrectly (a 1 was 77799789080 or some such), indicating a type conversion error likely related to the encoding of the number.
I'd like to keep the datatypes as numeric and make ssis use those - any pointers are greatly appreciated as to what type my package variable should be to allow proper assignment of a sql server numeric type to it.
Thanks much,
B
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Sep 17, 2003
Database is SQL Server 2000
I have a field in a table that stores date of birth. The field's datatype is char(6) and looks like this: 091703 (mmddyy). I want to convert this value to a datetime datatype.
What is the syntax to convert char(6) to datetime?
Thank you in advance.
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Mar 14, 2008
Hi,
I imported a table from Accees to SQL 7 with data in it.
I need to modify one of the datatype columns to "datetime" from nvarchar.
I tried to convert it manually, in SQL Server Enterprise Manager tool, but it gave me an error.
I also tried, creating another column "DATE2-datatype:datetime" and updating the column with the old one.
UPDATE users SET DATE2 = DATE.. But it also faild,..
How can I modify the column?
Thank you.
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Dec 15, 2005
HI,I have a table with IDENTITY column with the datatype as INTEGER. Nowthis table record count is almost reaching its limt. that is totalrecord count is almost near to 2^31-1. It will reach the limit with inanother one or two months.In order to avoid the arithmentic overflow error 8115, we would likechange the datatype from INT to BIGINT. we hope this will solve ourproblem.How do I approch this datatype conversion?. Since the data count ishuge, that leads to a long down time of database.we need better approach or solution for this problem?. kindly give mea better solution that will reduce the total downtime of the productiondatabase.?.Regards
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Feb 25, 2008
Hi guys..
i have so doubts in my mind and that i want to discuss with you guys... Can i use more then 5/6 fields in a table with datatype of Text as u know Text can store maximu data... ? acutally i am trying to store a very long strings values into the all fields. it's just popup into my mind that might be table structer would not able to store that my amount of data when u use more then 5/6 text datatypes...
and another thing... is which one is better to use as data type "Text" or "varchar(max)"... ?
if any article to read more about these thing,, can you refere to me...
Thanks and looking forward.-MALIK
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Feb 18, 2004
Does it make a difference if I use the Float or Int data type for a field such as ReceiptNumber or CheckNumber?
Thanks for any thoughts,
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Feb 20, 2000
Hi!
I'm quite new to SQL Server. I need to set a float datatype to display something like 3.55. However, all values that are stored in the float column are truncated to 4 or some other single digit. How can this be prevented?
Regards,
Sam
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Sep 5, 2002
Hello everyone,
I am sure this is a newbie question as I am new to Microsoft SQL server but any help is greatly appreciated. I am populating a SQL database from an AS400. The decimal numbers from the AS400 are coming accross with extra decimals. (ie. 63.02 is coming accross as 63.0200001)
Is there a way to limit the number of decimals in a float or real field - or a SQL command I can put in a script to truncate each field to 2 decimal places after they are populated.
Thanks,
Randy
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Jun 29, 1998
We are having problems with rounding errors on large monetary calculations in sql server 6.5
The calculations include float fields (for volumes and unit of measure conversions in product movements). I was wondering if the float being "approximate" could be the problem.
IF it is, why would I want to store things as a float instead of a dec(28,14)?
Is it faster to compute numbers stored as approximate binaries? Will we see a big performance hit if we switch some of the table`s field`s to decimals?
Thanks in advance.
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Jun 21, 2007
Hi,
why does converting integer to float take so long? Its a column with about 5 Million rows.
I want to avoid cast(inumber1 as float) / cast(inmuber2 as float), thats why converting them. Queries should be a bit faster after that.. hope so :)
Thanks a lot
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Dec 29, 2003
Hi there
I have two Databases
in both databases are fields with float - no null
If I am transfering data from one database to the other everything works well unless there is a comma in the field ( 0,99 or 123,456 )
"SQLAString = "Insert into InventurDaten (Artikelnummer,Hauptartikelnummer,Auspraegung,Arti kelbezeichnung,Artikeltext1,EDVEingang ,EDVAusgang,InventurmengeEDV) values ('" & ArtNr & "','" & ArtNrT & "','" & AP & "','" & ArtBez & "','" & ArtText & "'," & EDVEingang & "," & EDVAusgang & "," & ArtMenge & ")"
"
where EDVEingang and EDVAusgang are defined as float, no null
Then the programm stops with the following message:
Within the INSERT-Procedure there are less columns then there are Contents in the Value-Clause.
I have to finish the programm until tomorrow morning and don't know what the problem is.
If anybody has an idea, please let me know.
regards
Reiner
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May 4, 2004
When should I choose decimal over float and vice versa?
Mike B
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Apr 10, 2008
Hi Everyone,
here is a simple SP
Create procedure test
@input float
as
Begin
return @input
ENd
If I execute the following
declare @output float
exec @output=test 1.12121
select @output
why I got 1 not 1.12121?
any idea? How to get the correct result?
Thank you in advance
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Apr 3, 2006
Hi!How do I do to make t-sql not rounding the result that i returned?For example:0.9616458*60 = 57,698748 (in any calculator)while following:--------------------------------declare @a floatdeclare @b intset @a=0.9616458set @b=60print @a*@b---------------------------------will show :57.6987How do I do to make MSSQL to show me the value whothout rounding it?Thanks!
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Nov 22, 2006
select convert(float,'1.2334e+006')1233400.0select convert(decimal(20,2),'1.2334e+006')Server: Msg 8114, Level 16, State 5, Line 1Error converting data type varchar to numeric.Is there any way around?Is there any set options? I tried arithabort or arithignore and theydon't work.Thanks.
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Jul 20, 2005
HI,I WANT THIS TO PRODUCE EXACT RESULT. (IN SQL SERVER)SELECT (23 / 233) * 100THE ANSWER SHOULD COME 9.871244635 OR 9.87BUT IT RETURNS 0.I WANT THE PERCENTAGE.HOW TO HANDLE THIS KIND OF PROBLEM.IS THERE ANY SET COMMAND FOR IT?THANKST.S.NEGIJoin Bytes!
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Jul 20, 2005
Hi,Just wonder whyPRINT CAST(0.0573542567654 AS float)will give the rounded reult0.0573543rather than the original number?"float" should be 'big' enough to hold numbers that have even moredecimal places. How come it round up at the 7 decimal place?since I need to do some calculations with accumulated values. Therounded figure will cause significant error after a number of opertions.Are there any way to work around it?thanks*** Sent via Developersdex http://www.developersdex.com ***Don't just participate in USENET...get rewarded for it!
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Mar 20, 2008
I had database with "-1.#IND" (Indefinite /infinite) values in float columns.
Is there anyway I can insert -1#IND value into float column using some insert query and query analyzer? I am using SQL Server 2000.
I want to insert this value to replicate the issue..just for testing. I am also wondring how my database got these values.
Thanks in Advance!
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Nov 20, 2007
I am keep getting an arithmetic overflow converting float to type numeric when running a script that looks something like this.
insert into table1
(
column1
)
select
column2
from source server.
column1 is a numeric (28,8) and column2 is float.
there are about 2000000 records in column2, and I know that when I tried just copying the top 1000000 wasn't a problem.
does anyone know what could be causing this problem???
*it's not because the data in column2 is out of range.
thank you
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Mar 20, 2008
I had database with "-1.#IND" (Indefinite /infinite) values in float columns.
Is there anyway I can insert -1#IND value into float column using some insert query and query analyzer? I am using SQL Server 2000.
I want to insert this value to replicate the issue..just for testing.I am wondring how my database got these values.
Thanks in Advance!
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Dec 23, 2006
I'm using c# 2.0.
I have a datareader that reads an invoice line item from a table in my SQL Server database. The UnitPrice field is a Money field in SQL server. At the same time I have an invoice class in my application that has a UnitPrice property which is a float.
How do I convert the SQLMoney to a float using my datareader?
Right now I have:
cm.CommandText = "SELECT ItemID, Quantity, UnitPrice, Discount FROM tblInvoiceLineItems";
using (SqlDataReader dr = cm.ExecuteReader())
{
while (dr.Read())
{
LineItem li = new LineItem();
li.UnitPrice = (float)(double)dr.GetFloat(3); // cast error here.
lineItems.Add(li);
}
}
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