Hi all
I'm a newbie in SQL server and please excuseme for this silly question, Could anyone tell me when i should use which of the following types:
Decimal
Float
Real
I've mixed up !!! all of them can have floating point BUT what's the difference? some advise please!
Thanks in advance.
Kind Regards.
I need to write a floating point value to a column in a SQL server database. I have the following line ofcode, that formats the float value before passing it off to the stored procedure.
Please look at the line of code below. Does the 8 after SqlDbType.Foat mean that this will be a floatingpoint with 8 signigicant digits past the decimal point?
mySqlCommand.Parameters.Add("@Price", SqlDbType.Float, 8).Value = float.Parse(InitialPrice);
Hello all,
I can't see any reason for this error, not having a high level understanding of maths I thought I'd post it and hope someone could share some light on it.
I yesterday got called by a client who said that a payment for £15 + VAT was being passed to their payment gateway as 17.62 when it should be 17.63. The VAT calculation is performed in a SQL Server 2000 stored procedure. In the end I tracked it down and it wasn't a propblem with my calculation.
The price was coming out as 17.63 fine. The stored procedure then had to return this price in pence (17.63 * 100 = 17.63). When I put in a print statement with this calculation it was correct but when I output the variable that the result was assigned to it was coming out as 1762.
The variable that the result was being put into was of real datatype.
I then wrote a udf to test this. Here is the function:
CREATE FUNCTION dbo.POUNDS_TO_PENCE
(
@POUNDVALUE real
)
RETURNS INTEGER
AS
BEGIN
RETURN @POUNDVALUE * 100
END
As you can see nothing very special.
If you run this runction and pass in 17.63 it will return 1762!!!
The bit I don't get is if I change the @POUNDSVALUE intput variable to type float it returns the correct amount.
I've also found that the same problem occurs when passing in £30 + VAT (35.25) + 1pence. So, 35.26 comes out as 3525 instead of 3526. This is the case if you keep doubling the number (and adding a few pence here and there).
Does anyone know why this is or is it a bug in the processor?
The SQL books online say the following about the float and real data types:
--------------------------------------------------------
float and real (T-SQL)
Approximate number data types for use with floating point numeric data. Floating point data is approximate; not all values in the data type range can be precisely represented.
Syntax
float[(n)]
Is a floating point number data from - 1.79E + 308 through 1.79E + 308. n is the number of bits used to store the mantissa of the float number in scientific notation and thus dictates the precision and storage size. n must be a value from 1 through 53.
n is Precision Storage size
1-24 7 digits 4 bytes
25-53 15 digits 8 bytes
The Microsoft® SQL Server™ float[(n)] data type conforms to the SQL-92 standard for all values of n from 1 to 53. The synonym for double precision is float(53).
real
Floating point number data from –3.40E + 38 through 3.40E + 38. Storage size is 4 bytes. In SQL Server, the synonym for real is float(24).
--------------------------------------------------------
Apart from the fact that it says 'Approximate number data types' I can't see any difference between the data type apart from the ranges.
Anyone any ideas?
Thanks
Tom Holder
How can I truncate a floating point number to required number of decimal points
Eg:
100.642364074 to 100.64 and 67.643929847 to 67.645
Thanks.
Hi.
Intermittently, the following error has been displayed when a SQL job on our box (SQL Server 2000 Service Pack 4 running on Windows 2000) runs.
'A floating point exception occurred in the user process. Current transaction is canceled.' The error number given is 3628 though I've also seen a 4xxx number (not at machine at the moment so cant be precise for the latter).
The intermittent problem over the last two days has become more regular and now does not appear to be related solely to the SQL job. For example, when connecting to the box using my local copy of SQL 2005 Management Studio and I attempt to browse the database objects I get this problem.
To the best of my knowledge, this server has not had any software installed on it and/or nothing has changed on it recently.
It has now got to the point that this particular job no longer runs. The job in question, in case this is significant, is a vanilla stored proc that returns data using OPEN ROWSET to communicate with an Access database (this connectivity has been verified to be okay, in that other similar jobs all run just fine)
If anybody can shed some light and/or point me in the right direction I would be extremely grateful.
Cheers
CG
Hi,I would like to know, if I need to do some floting point operations(mainly multiplication and division) on each roll of a table, should Iread the data out from the DB and do the calculation with a programminglanguage, say C#, or should I just use sql to do it on the sql server.An obvious advantage of doing it in the sql server is that you dontneed to transfer the data between the sql server and he applicationserver.But I am not sure if there are any other factors that will overridethis advantage: like the performance of doing lots of floting pointoperations in sql server.How is the performance of doing floting point operations in sql servercomparing to C# or other languages?Also are there any other factors that should be considered for thiscase andare there any other advantages to do this is sql server or in c#?ThanksBenny*** Sent via Developersdex http://www.developersdex.com ***Don't just participate in USENET...get rewarded for it!
View 1 Replies View RelatedI'm trying to perform a calculation on a field in SQL Server thatshould return a value with a decimal point. My problem is that thevalue returned is truncated without the decimal point. Is there asetting that needs to be turned on in SQL server to allow this?for exampleSelect 20/3should return 6.6666667but instead I get 6
View 1 Replies View RelatedHi SQL people,
I have rating system on pages in my website, each page being rated one to five by users. At the back end, an ASP.NET page displays the average rating and number of ratings for each page. As the rating is stored as an integer, the SQL statement returns an integer average. I would like to get a floating point average. Currently the statement used to return the average looks like this:
select AVG(Rating) as AverageRating from Ratings where [RatingPage] = @RatingPage
Is there a simple way to modify this to return a floating point average without iterating through the records, or converting the Rating field to a float?
Thanks for helping!
I have the following query:
SELECT AVG(respondent_question.answer)
Now, the 'answer' column is an integer. However, I want the query to return a floating point number with one decimal place (i.e., 5.4, 2.3)
Since the column is an integer, the query returns only an integer by rounding to the nearest integer. How can I do this? Thanks!
Hi,
I got below error in the SQL Server Production Server and i checked in the microsoft site it needs to install SQL Server service pack 4 to resolve the
problem.
"A floating point exception occurred in the user process. Current transaction is canceled"
I need help that i want to reproduce this below problem in the SQL Server environment and tried several ways but no luck.
Please advise me how to reproduce the problem.
Would be appreciate your help.
Regards
Sathish
I'm having a problem that I think is due to corrupt data. Depending on
the column I use in my order by clause two problems are occuring.
1. No results are returned and I get this error:
A floating point exception occured in the user process.
2. Results are returned but there are a different number of rows depending on which columns I use in my Order By clause.
Examples
SELECT * FROM SymbolStats
ORDER BY calc_date, symbol
Returns - 12207 rows but only includes one of the 25 dates in the table.
----------
SELECT * from SymbolStats
ORDER BY current_hv
Returns - 0 rows.
----------
SELECT * from SymbolStats
ORDER BY average_hv
Returns - floating point error
With more conditions in the WHERE clause the number of results returned varies greatly.
The
fact that different numbers of rows can be returned from the same query
only differing in how they are ordered seems like a bug.
Does this sound like corrupt data? If so, what are the best methods for fixing it?
Thanks,
patrick
I'm getting this error:
System.Data.SqlClient.SqlException: A floating point exception occurred in the
user process. Current transaction is canceled. at
System.Data.Common.DbDataAdapter.Update(DataRow[] dataRows, DataTableMapping
tableMapping) at ...etc etc
when updating one particular table, but not when updating another using nearly the same code.
I've searched and searched on the inet, but with no joy.
Microsoft have several different manifestations of it, under various
different circumstances, but the solutions all seem to involve
installing SP4, which by the looks of it is a massive procedure that
you have to go to university to be competent to do.
In any case, according to Enterprise Manager, I already have SP4
included. On the other hand, the one file of mine I checked the date of
against MS's hotfix file list was 2002 not 2003, so who knows?
My Service Manager is v 8.00.760, and it's the Development Edition (ie it's all running on the one machine).
According to the info on sqlDataAdaptor.update, the
sqlError that gets returned as part of the sqlException contains
fields Class, which gives the seriousness of the error, and State,
which identifies the exact error. I get Class=16 (user-fixable)
and State=1, which we have to go to SQL Books Online to discover the
meaning of. SQL BO probably sounded like a good idea to W.Gates,
but it took me half an hour to get anywhere near finding out what that
'1' meant. When I did, it was (guess): 'A floating point
exception occurred in the user process. Current transaction is
canceled.' !!!
Can anyone please tell me what exactly might be causing the error?
Graham Rounce
I am trying to understand why SQL Server gives me significantly lower precision than many of the other sources that have tried when using the POWER function. My environment is 2008 R2 SP2 (10.50.4000.0 X64, Standard edition) on Windows 2008 X64 SP1
DECLARE @x FLOAT(53) = 1.0004;
DECLARE @y FLOAT(53) = 1.0/12.0;
SELECT POWER(@x,@y)-1; -- Answer: 3.33270904724348E-05
GO
DECLARE @x FLOAT(24) = 1.0004;
DECLARE @y FLOAT(24) = 1.0/12.0;
[URL] ....
Answer: 3.33272237835747E-05
I also tried using Windows Calculator.Answer:3.3327223783495255846580902358195e-5
And an online "high-precision" calculator from [URL] ...
Answer: 3.332722378349525584658E-5
The best SQL results compare only to the fourth digit with other results. Everything else agrees to the 10th or 12th digit.
Is the precision of arithmetic calculations on SQL Server that bad, or am I doing something wrong here? Is there another more precise alternative?
I did the following. The results speak for themselves
DECLARE @x FLOAT(53) = 1.0004;
DECLARE @y FLOAT(53) = 1.0/12.0;
DECLARE @z FLOAT(53) = POWER(@x,@y)-1; -- Answer: 3.33270904724348E-05
SELECT POWER((1+@z),12); -- 1.00039999839968
-- using results from other sources (c#, windows calc, casio.com)
SELECT POWER((1+3.33272237835747E-05),12) -- 1.0004
SELECT POWER((1+3.3327223783495255846580902358195e-5),12)-- 1.0004
SELECT POWER((1+3.332722378349525584658E-5),12) -- 1.0004
It is not important what I am trying to do, but in case it will work, I am trying to calculate the monthly return for a 90-day T-bill given the compounded annual return. x is the annualized return.
sql server 2000 sp4 build 2184runs stats with maintenance plansp_msforeachtablestored procedure updating full stats for each table and the resultsare identicalA floating point exception occurred in the user process. Currenttransaction is canceled.all pointers are to move to latest service packAny pointers on how to avoid this errorThanks for your timeMassa
View 6 Replies View RelatedI am trying to run "select * from <table> where <columnname> = 0.0" inquery analyzer<columnname> is a floatI get the following error:Server: Msg 3628, Level 16, State 1, Line 1A floating point exception occurred in the user process. Currenttransaction is canceled.I get the same error when I use the float <columnname> through anapplicationI have tried upgrading to SP4, without any luck - still get the errormessage.Any help would indeed be appreciated.Thanks -AH
View 1 Replies View RelatedWe get the following error message."a floating point exception occured in the user process. currenttransaction is cancelled".this message comes when trying to excute a stored procedure. Thisexception is unpredictable.OS : Windows 2000 (SP3)Version: SQL server 2000 (SP3).
View 1 Replies View RelatedHi,I'm running SQL Server Version 8.00.194 on Windows 2000.I am am running this query:select TOP 2000TheoVolImpliedfrom OptionTradeswhere ReutersSymbol = 'IBM.N'and TheoVolImplied > 0.0TheoVolImplied is of type float, precision 15, length 8.When I run this query I get this error:Server: Msg 3628, Level 16, State 1, Line 1A floating point exception occurred in the user process. Currenttransaction is canceled.If I run this query:select TOP 2000TheoVolImpliedfrom OptionTradeswhere TheoVolImplied > 0.0It works fine with no problems.If I run this query:select TOP 2000TheoVolImpliedfrom OptionTradeswhere ReutersSymbol = 'IBM.N'It works fine with no problems.Anyone have any ideas about what might be wrong?
View 2 Replies View RelatedHello all,
First off, I appreciate the time that those of you reading and responding to this request are offering. My quesiton is a theoretical and hopefully simple one, and yet I have been unable to find an answer to it on other searches or sources.
Here's the situation. I am working with SQL Server 2005 on a Windows Server 2003 machine. I have a series of databases, all of which are in Full recovery mode, using a backup device for the full database backups and a separate device for the log backups. The full backups are run every four days during non-business hours. The log backups are run every half hour.
Last week, one of my coworkers found that some rarely-used data was unavailable, and wanted to restore a database to a point in time where the data was available. He told me that point in time was some time back in November.
To accomplish this, I restored the database (in a separate database, as to not overwrite my production database) using the Point in Time Recovery option. I selected November from the "To a point in time" window (I should note that this window is always grey, never white like most active windows, it seems), and the full database backup and the subsequent logs all became available in the "Select the backup sets to restore" window.
I then tried a bevy of different options from the "Options" screen. However, every restore succeeds (ie: it doesn't error out), but seems to be bringing the database back to a current point in time. It's never actually going back to the point in time I specify.
My questions are as follows:
a) Is it possible to do a point in time recovery to a point in time BEFORE the last full database backup?
b) If so, what options would you recommend I use? (ie: "Overwrite the existing database", restore with recovery, etc etc).
I again appreciate any and all advice I receive, and I look forward to hearing from anyone and everyone on this topic. Thank you.
Ryan
for example:
SELECT CAST(CAST(getdate() AS datetime) AS float)
how can i convert the return select value to nvarchar????
Hi,
log backup done every 5 min.
so sql server log file full of entries
"Log backed up: Database: Prices, creation date(time):...."
could loging for Log backed for db Prices be disabled ?
Thanks
Alex
Apologies for the way in which I describe the tables and data, I know I'm not using a very proper way to get my point across:
Table A: "tblJobs" Contains the following:
--------------------------------------------
COLUMNS:
1. JobPK (char(35))
2. LocationName (varchar(50))
DATA (csv):
6643C9C9-7618-472F-9859844AA6C0F47B, Jonesport ME
08563708-3830-4507-B3154E9C4D49C6F2, Garden City NY
Table B: "tblJobDates" contains the following data, related to the two rows above):
--------------------------------------------
COLUMNS:
1. JobPK (char(35))
2. DateData (datetime)
3. CRD (datetime, "Created Date" the date and time that the date was entered)
DATA (csv):
6643C9C9-7618-472F-9859844AA6C0F47B, 6/8/2002, 6/10/2002 12:44:58 PM
6643C9C9-7618-472F-9859844AA6C0F47B, 6/17/2002, 4/22/2002 2:07:31 PM
08563708-3830-4507-B3154E9C4D49C6F2, 6/12/2002, 6/7/2002 4:05:06 PM
08563708-3830-4507-B3154E9C4D49C6F2, 6/13/2002, 6/12/2002 11:38:22 AM
tblJobDates serves two purposes: to give us the most recently entered due date for a job, and to serve as a "repository" to track changes to the due date.
Report C: The report I want to generate does NOT provide historical information... it only serves to show the CURRENT due date for each job in the tblJobs table:
--------------------------------------------
COLUMNS:
LocationName
Due Date (alias of DateData)
OUTPUT (csv):
Jonesport ME, 6/8/2002
Garden City NY, 6/13/2002
Note that for Jonesport, an initial due date of 6/17/2002 was entered (based on the CRD). Then someone changed it so that the job was due EARLIER.
Note that for Garden City, an initial due date of 6/12/2002 was entered (based again on the CRD). Then someone changed it so that the job was due LATER.
The "most recently entered due date" is what should be reflected in my report -- just as it does above ("C")
Other Notes:
-- There are other columns of information from both tables that i would like to return, but above is the most basic form of my request. Most notably, we would need to return the JobPK in report (C).
-- A job should only appear ONCE in report (c), with it's "current" due date, regardless of the other due dates that may have been entered for that job.
-- If a job has no due date, it should not appear on the report.
-- Although not shown here, each row in (B) DOES have a unique identifier (DatePK) as well... if that helps in your solution.
-- Note that the job that is "due first" appears at the top of report (C). This allows a person looking at the report to quickly determine which job "gets priority" -- the one on top!
Okay gurus -- how should the query look that would generate the desired output in Report C?
THANKS IN ADVANCE if you even can point me in the right direction!!
I need to decided between Standard and Enterprise Edition (Cost is acriteria - but its secondary to performance - <!--and I am not paying forit myself-->)The server spec under consideration: Dual Xeon, 1GB RAM, 36GB - RAID 1(Dell PowerEdge 1850).Application: Windows 2003 Std Server, ASP.NET, MS SQL Server 2000 baseddata driven web application.Approximately 25 simultaneous clients. Peak activity would probably be 50transactions/activities per second (2 per second per client). I expectthe database size to grow up to 4GB in 1 year.The application would use only basic OLAP features (if at all)...sofeature set wise I believe that standard edition is good enough.What I am concerned about is when MS documentation says that StandardEdition is for "organization that do not require the advanced scalability,availability, performance, or analysis features of the SQL Server 2000Enterprise Edition"Is there a difference in performance between Std and Ent editions? Interms of number of transactions per second that can be serviced?What other criteria should I be aware of before deciding to go one way orthe other?Any ideas?
View 4 Replies View RelatedThere must be a way to do this simply. We're running SQL Server 2000. I'm looking for some generic SQL statement that I can apply.
If I have a table with a person column and a location column and multiple records for the same person / locatioin combination, how do I select the person with the location they most frequently visited? Say George visits Mexico 5 times, and the Bahamas twice and costa rica once. I would have 8 records in my table for George. The data looks something like this:
George/Mexico
George/Mexico
George/Mexico
George/Mexico
George/Mexico
George/Bahamas
George/Bahamas
George/Costa Rica
Ben/Brazil
Ben/Brazil
Ben/Peru
The results would be:
George/Mexico
Ben/Brazil
Thanks!
Myles
Please help me out:
I have some records in a sqldatasource and want to show it column wise. Now I do it with a datalist because it's easy. But other options are open.
Every item/record should have a radiobutton (in a group, so that you can only choose one from all). People advised me to do this with a html radiobutton inside the template.
After the user has selected an item and chooses the next-button I need to know what item the user has choosen.
Furthermore, when the user likes to step back, the same radiobutton should allready be selected.
Please help, this is bothering me for a while,
best regards from The Netherlands,
Gert
My company has a website that connects to a sql server (on a different box). I am trying to convince them to get sql server 2005. However, I do not know if SQL Server 2005 Workgroup edition is okay for our needs. Can someone please tell me if it is.
Basically, our setup is the following:
The SQL Server will only have one/two clients - the web server
i have to store some data on a remote sever(MS SQL SERVER2000). The scenario is like 1. The web application runs on a local machine. User (who inputs) uses through LAN.2. The Input should be stored in the remote server. if the remote connection is ok. otherwise it should be saved in local server's database(MS SQL 2000).3. In the application's web.config there is a connection string pointing to the remote server and another one (alternating one) points the local server's database. in scenario like this i first to tested the remote connection. if it is not ok then i initialize the local server's connection like thisprivate MyConnection() { try { connectionSql = new SqlConnection(ConfigurationManager.ConnectionStrings["ConnForRemote"].ToString()); connectionSql.Open(); } catch (Exception ex) { connectionSql = new SqlConnection(ConfigurationManager.ConnectionStrings["ConnForLocal"].ToString()); } finally { connectionSql.Close(); } connectionSql2 = new SqlConnection(ConfigurationManager.ConnectionStrings["Temp"].ToString()); }My problem is when the remote connection is lost it takes almost 1 minute to store in local database. how can i make it more time efficient. Thanks....
View 5 Replies View RelatedHi ... I have question on datatype on SQL Server 2005 EE
What is a good data type for email, password, Phone Number and ISBN number?
Thanks!
Hello,
I have a table with some data in it.
What I want to do is to create a query that returns me randomly
one of the records of the table. Can this be done?
If this is not possible from SQL server I have thought an
alternative way. This is:
I want to return all rows of the table with SELECT *,
but I want the select to return in the first column an
autoincreament number for each row without the need to add
an autoincrement field in the table. e.g
Table
------
Banana
Tomatoe
Aple
...
...
Orange
Result from select
------------------
1 Banana
2 Tomatoe
3 Aple
. ....
. ....
23 Orange
Can this be done?
At least this way
1) I can travel to the end of the results (from ASP),
2) read the ID of the last row
3) Create a random integer number from 1 to last ID,
4) and finaly select the appropriate random row from that integer.
Can anybody help me please?
Thanks for any help in advance!
Yours, sincerely
Efthymios Kalyviotis
ekalyviotis@comerclub.gr
Greetings!
I am purchasing a new/first server and could use some help with the details.
I am purchasing the server with the intent of managing a large database that will be quite extensive and requires a good amount of processing power. I have decided to go with windows server 2003 and SQL Server 2000 as a database. Within next year I hope to have this database directly flowing to a website that I could possibly be hosting as well as 2-3 offsite employess logging into the system remotely.
I would say my biggest question is whether or not to choose the raid 1 configuration or the raid 5. I want to be able to have the Hard drives mirror eachother. I was thinking of going with three hard drives but im not really sure if I would even need that setup. With that, I will just show my current system:
Dell poweredge 1800
3.0 ghz xeon
2 gb memory
sata 1 raid
cerc 6-Channel sata raid controller
160 gb hd x 2
onboard NIC network adapter
Im going price savvy on this one so no ups redundant, power supplies, or tape backup. Although I am open to any suggestions.
Definately appreciate any help with this as I have been hard pressed to find some quality reseller help. They just want to throw the biggest and baddest thing at me.
Thanks!
-Shawn
Hi All,
I would like to know the experts views on the following I have listed below.
1. Is there any significant performance gain by choosing the Native SQL server driver rather than OLEDB for example. I know there are lot of specified features in the Native SQL Driver but I am thinking in terms of the performance.
2. Why not develop for the generic database rather than specific database?
3. More generic mean less work when migrating database to a different database?
Appreciate your valuable thoughts and any recommendations.
Cheers,
Amal
I have an SQL as follows
UPDATE TB
SET [Deleted] = 1
WHERE TB.[ QuestionId] = @QuestionId
I have an index in this table as follows
CREATE NONCLUSTERED INDEX [IX_AssessedAnswers1] ON [TB]
(
[Id] ASC,
[QuestionId] ASC,
[Deleted] ASC
)WITH (PAD_INDEX = OFF, SORT_IN_TEMPDB = OFF, DROP_EXISTING = OFF, IGNORE_DUP_KEY = OFF, ONLINE = OFF) ON [PRIMARY]
Whether this index will be considered by the query optimiser to lock records? If I created another index with only the QuestionId field will it boost the performance? Actually how the optimiser chooses the right index while update?
I'm running SQL Server 2005 on a Server 2003 machine serving both our home network as well as a remote site through a point-to-point T1. While file transfer speeds are up to par, the remote site's interaction with SQL Server (Point of sale system) is very slow. After testing I am certain that it has nothing to do with the actual physical machine in place neither is it an issue with the program itself since speeds are as they are supposed to be over the home network lan. It seems that there might be a packet size issue or something of the sort. Has anyone dealt with this before or have any thoughts?
Thanks,
Peter
hi,
I need to choose a database based on the following criteria (using .NET app):
1) a light but fully functional database, preferably with the support of store proc and constraints, less than 8000 transaction a day.
2) portable or the database can be export/import very easily
3) reliable and stable
4) least maintenance
I have two db in my mind, Access and MSDE?
Does anyone have some hand-ons experience on the above two? Or any other better suggestions?
Any advice is appreciated.
thanks,
bryan