Storing IEEE 754 Floats In SQL Server 2005 (NaN, +/- Infinity)
Nov 17, 2006
Hi all,
Is there a way to get SQL Server 2005 to store NaN and Positive and Negative infinity values for double precision floats? It used to work fine under SQL 2000 and works great under MS Access, but we are updating our scientific application, and really need to be able to store this information efficiently under SQL Server 2005. We really want to dump Access because of database storage limitations.
It really amazes me that there is not more support for this as the limitation really makes it hard to store a lot of our simulation data. I guess SQL Server is more geared for financial data then scientific data. I know that Oracle supports this but we rather stick with SQL Server if we can.
We really want to avoid having to have an extra column to store this, that would be disastrous. NaN could be stored as null values. And, no, we cannot map +/- Infinity to Min and Max double values. We definitely need the distinction there.
Another post I read talked about custom user types€¦ but I€™m not sure how well that will work with our analysts pulling the data into other tools, like Excel.
Any help or suggestions would be appreciated. It just boggles the mind that SQL Server does not seem to handle true IEEE 754 doubles. How is Microsoft going to deal with C# 3.0 and DLinq support? The issue must show up there.
Working in a project using Entity Framework (Code First)...
Until now the project has been connected to a (generated) SQL Server Compact 4.0 database,
but now we want to connect to a SQL Server (at least 2008R2 since we will use FILESTREAM...)
Our problem right now is the possibility to enter Infinity values into REAL columns in the DB...
It works in the SQL Server Compact but we have not been able to get it to work in 2008R2 or 2014
The insertion of Infinity values is constructed by the Entity Framework (from using float.PositiveInfinity in C#) automatically so I mainly wonder if it at all is possible in a "real" database. Maybe there are some configurations possible to get it to work?
Hi All,I am looking to store a DataSet into a Table in SQL Server 2005, or any object for that matter. I cannot find any code to perform. Can anyone help?Many Thanks,Peppa.
Hi Everyone, I have an e-commerce site that uses Profiles in ASP.NET 2.0 to store items in a shopping cart. The problem is that we are now using LDAP authentication, so we are getting rid of the ASPNETDB membership database that stores the profile values. How can get the shopping cart functionalty to work with SQL Server 2005? How can I store the profile object in a SQL Server instead of the ASP.NET memberships database? Here is the profile field: <profile enabled="true"> <properties> <add name="Cart" serializeAs="Binary" type="Commerce.ShoppingCart" allowAnonymous="true"/> </properties> </profile>
I have a directory with many images, i need to load these images into sql server.We want to staore them in the database instead of the file server.
What is the best way to do this? TSQL (i am hoping), .NET code or maybe even SSIS ?
I have been reading what i can find in BOL basically all i know so far is that image data type will be no more in the future and i should use a varbinary(max) data type. Basically i need a good link or something that can demonstrate how one can go about loading images into Sql Server 2005.
Does anyone know whats wrong with my code? ~Nothing wrong with my code, code is correct!
I let it run and it keeps saying that the file does not exist. Seem as though, the path of my file doesn't exist! Any suggestions on how to program the path of my file so I can be able to retreive it such as open the file and access the file?
Private Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim SQL As String
Dim rawData() As Byte
Dim RowsAffected As Integer
Dim filename As String
filename = "H:My Documentsabc.pdf"
Try
If System.IO.File.Exists(filename) Then
Dim filePermission As New System.Security.Permissions.FileIOPermission(System.Security.Permissions.FileIOPermissionAccess.Read, System.Security.AccessControl.AccessControlActions.View, filename)
filePermission.Demand()
Else
MessageBox.Show("file does not exist", "File", MessageBoxButtons.OK, MessageBoxIcon.Information)
End If
Dim fs As FileStream
fs = New FileStream(filename, FileMode.Open, FileAccess.Read)
Hi, How to insert or store arabic data into a table in sql server 2005, also i want to retrieve it as arabic format.But now it insert (?????) like this.Please help me to find a solution. Regards Sabna S
I have a table that I'm inserting a file into and using the Image data type to store the binary object. Now the code below works fine for files around 1.5 MB, but anything larger and it's like the code won't even execute and I get a Page Not found error. I'm in the process of running some traces to find out what's going on in the backend, but I'm assuming there's something amiss with my code. The Image data type should handle files that size with no problem but for some reason it isn't. Does anyone see anything wrong? Thanks Dim iLength As Integer = CType(File1.PostedFile.InputStream.Length, Integer) If iLength = 0 Then Exit Sub 'not a valid file Dim sContentType As String = File1.PostedFile.ContentType Dim sFileName As String, i As Integer Dim bytContent As Byte() ReDim bytContent(iLength) 'byte array, set to file size
'strip the path off the filename i = InStrRev(File1.PostedFile.FileName.Trim, "") If i = 0 Then sFileName = File1.PostedFile.FileName.Trim Else sFileName = Right(File1.PostedFile.FileName.Trim, Len(File1.PostedFile.FileName.Trim) - i) End If conn = New SqlConnection(eco) conn.Open() cmd = New SqlCommand("INSERT INTO ECO_Attachments (ECOID, FromType, DocName,OldRev,NewRev,NtLogin,DisplayName, FileName, FileSize, FileData, ContentType) VALUES (@ECOID, @FromType,@DocName,@OldRev,@NewRev,@NtLogin,@DisplayName, @FileName, @FileSize, @FileData, @ContentType) ") cmd.Connection = conn Try File1.PostedFile.InputStream.Read(bytContent, 0, iLength) With cmd .Parameters.Add("@ECOID", SqlDbType.Int) .Parameters.Add("@FromType", SqlDbType.NVarChar, 50) .Parameters.Add("@DocName", SqlDbType.NVarChar, 250) .Parameters.Add("@OldRev", SqlDbType.NVarChar, 50) .Parameters.Add("@NewRev", SqlDbType.NVarChar, 50) .Parameters.Add("@NTLogin", SqlDbType.NVarChar, 100) .Parameters.Add("@DisplayName", SqlDbType.NVarChar, 200) .Parameters.Add("@FileName", SqlDbType.NVarChar, 255) .Parameters.Add("@FileSize", SqlDbType.Real) .Parameters.Add("@FileData", SqlDbType.Image) .Parameters.Add("@ContentType", SqlDbType.NVarChar, 50) .Parameters("@ECOID").Value = ECOID .Parameters("@FromType").Value = From .Parameters("@DocName").Value = DocName .Parameters("@OldRev").Value = OldRev .Parameters("@NewRev").Value = NewRev .Parameters("@NTLogin").Value = NTLogon .Parameters("@DisplayName").Value = DisplayName .Parameters("@FileName").Value = sFileName .Parameters("@FileSize").Value = iLength .Parameters("@FileData").Value = bytContent .Parameters("@ContentType").Value = sContentType .ExecuteNonQuery() '.ExecuteScalar() End With Catch ex As Exception Response.Write(ex) 'Handle your database error here conn.Close() End Try
colA colB colA - colB The reminder 2.04166666666667 2 0.0416666666666665 0.999999999999996
You'll notice the workaround to get the decimal part of a number, if you wonder why its because sql2000 in the operand % only supports integers. Anyway, try on your calculator ( 2.04166666666667 - 2 ) it probably answer: 0.04166666666667.
BUT SQL NOT! you see how the result is amazingly 0.0416666666666665 ????
Does anybody knows a solution for this??? What am I doing wrong???
If you try the query but instead of 49.0 use 25.0, it returns the correct value !!.
Hi There, Can I store flash files in the database. I have a table with one of the columns as varbinary datatype. Previously, I was saving images (as filebytes) into this column. But now I need to implement something to store the flash file. So, is it possible to store flash files in the database and retrieve them and display them in an asp.net page? Thanks a lot for your suggestion!!
We are trying to use source control to store our database objects andqueries in Perforce. The general idea is to produce scripts whichcreate all objects in the DB and then store the SQL in source control.Has anyone done this before and can suggest some advice? Alternativelyif anyone has other methods for using source control on a database,could you please let me know?Also, is there any automated way of extracting individual scripts forobject creation from the database?
I'm wondering what is the best way to store time-series data in an SQL database?? I've done a bit of investigating on the rrdtool (round robin database tool) that is used in a lot of nix based solutions for monitoring network equipment. I have a need to collect performance data from servers and routers and then produces some nice graphs from that data. I'm just not sure who i should store that data without the database growing to some huge size.
I am working with an off the shelf app that controls decimal places through the application. All columns underlying the apps 'numeric' fields are floats. We are writing some scripts that need to compare numbers and some of them look like the second row
I'm using a Hemisphere West MSR-152 card reader. I need to take data from the reader and store it into SQL Server 2005 Express. Can anyone give ideas on how to do this (sample code recommendations). I'm using visual studio 2005 express and I code with VB.NET.
I want to store a Zip file as a BLOB, but I get an error: "File 'C:<path of mdf file> ' appears to have been truncated by the operating system. Expected size is 2560KB but actual size is 1536KB " whenever the BLOB exceeds 1MB.
Any suggestions? How can I store larger .ZIP files to the Database? I am using MS SQL 2005 Express and the data type that I gave for the column to store Blob is "varbinary(MAX)".
I am inserting byte array in to this field. It works fine for a zip file less than 1MB but as soon as the zipped file size increases beyond 1MB, lots of error pop-up and then the database is not readable. Its says that, the data in the data base may have been corrupted...
Hi there ,1. i have a database and i want to encrypt my passwords before storing my records in a database plus i will later on would require to authenticate my user so again i have to encrypt the string provided by him to compare it with my encrypted password in database below is my code , i dont know how to do it , plz help 2. one thing more i am storing IP addresses of my users as a "varchar" is there a better method to do it , if yes plz help me try { SqlConnection myConnection = new SqlConnection(); myConnection.ConnectionString = ConfigurationManager.ConnectionStrings["projectConnectionString"].ConnectionString; SqlDataAdapter myAdapter = new SqlDataAdapter("SELECT *From User_Info", myConnection); SqlCommandBuilder builder = new SqlCommandBuilder(myAdapter); DataSet myDataset = new DataSet(); myAdapter.Fill(myDataset, "User_Info"); //Adding New Row in User_Info Table DataRow myRow = myDataset.Tables["User_Info"].NewRow(); myRow["user_name"] = this.user_name.Text; myRow["password"] = this.password.Text; // shoule be encrypted //not known till now how to do it myRow["name"] = this.name.Text; myRow["ip_address"] = this.ip_address.Text; myDataset.Tables["User_Info"].Rows.Add(myRow); myAdapter.Update(myDataset, "User_Info"); myConnection.Close(); myConnection.Dispose(); } catch (Exception ex) { this.error.Text = "Error ocurred in Creating User : " + ex.Message; }
Public Function TestDivide(Numerator as double, Divisor as double) dim retVal if Divisor = 0 then retVal = 1 end if if Numerator = 0 then retVal = Numerator/Divisor elseif Numerator< = 0 then retVal= 0 else retval =Numerator/Divisor end if return retVal End Function
When Both Numerator and Divisor are 0, I get NaN When the Divisor is 0, I get infinity.
I am trying this approach because I read about it in so many posts on this and other forums, but still having problems. What am I doing wrong? Thanks!
help... I have a field called PercentVar_P4 which really is budget - actuals... I need to create an expression that will that the
PercentVar_P4/budget.. when I do I get Infinity and nan... I want to see the negative number.. I have read through all the blogs and nothing seems to fit..
I've made a MDX calculation in SSAS and it works fine, but when i look at my report (which is based on my cube), the same calculation gives "infinity".
I am using the 3-tiered architecture design (presentation, business laws, and data acess layers). I am stuck on how to send the image the user selects in the upload file control to the BLL and then to the DAL because the DAL does all the inserts into the database. I would like to be able to check the file type in the BLL to make sure the file being uploaded is indeed a picture. Is there a way I can send the location of the file to the BLL, check the filetype, then upload the file and have the DAL insert the image into the database? I have seen examples where people use streams to upload the file directly from their presentation layer, but I would like to keep everything seperated in the three classes if possible. I also wasn't sure what variable type the image would be in the function in the BLL that receive the image from the PL. If there are any examples or tips anyone can give me that would be appreciated.
Hello there,I just want to ask if storing data in dbase is much better than storing it in the file system? Because for one, i am currenlty developing my thesis which uploads a blob.doc file to a web server (currently i'm using the localhost of ASP.NET) then retrieves it from the local hostAlso i want to know if im right at this, the localhost of ASP.NET is the same as the one of a natural web server on the net? Because i'm just thinking of uploading and downloading the files from a web server. Although our thesis defense didn't require us to really upload it on the net, we were advised to use a localhost on our PC's. I'll be just using my local server Is it ok to just use a web server for storing files than a database?
Hello,I'm looking for a tutorial or some sample code to save a file in sql server with c#. So far I have not been able to find a anything I could use as most tutorials are in VB. I'm using the varbinary max type to store the file. The part I need help with is selecting the file and converting it using the Stream object, not the SQL insert statements. Thanks,Arnold
I did some quick Googling and didn't find the article of my dreams here. Any experience with storing files in the db in 2005? Any opinions?
Here's the deal. We have our new 'Enterprise' software being designed and written in St. Petersburg (not FL) and I'm reviewing the design for dealing with letters and forms that are generated as hard copy from our business (by the thousands per month) and sent to clients for review, signature etc. Then they are returned by fax or snail mail.
The current design has all of these being stored in image data type columns in the database--storing saved files of the actual outgoing stuff and saved files of the stuff that comes in (scanned copies or the files from our fax server).
This screams 'BAD IDEA' based on our experience doing this in SQL Server 2000. We get things like 23 page faxes from Dr's offices, large packets of FMLA forms returned, etc. In 2000 they tended to get rather large when stored in the DB and caused us all kinds of headaches when Microsoft changed how it recognized and displayed certain types of files, e.g. tiffs.
Further, the outgoing stuff is largely boilerplate with added fields from the db--name, address, a few dates. My proposed design for outbound notifications and forms was to keep only references to the template used, the date created, and an id to link it to the personal info of the schmoe to whom it was sent--essentially, store which document template and then just enough data to map to the variable content that is pulled from the db. Then you can recreate the file that was printed and mailed at any time in the future, but you don't actually save the .doc (or Word .xml) anywhere, not in the file system, not in the db.
The current developers feel this is way too much work to design--and it is certainly more effort than just generating .docs/.xml files via a merge with Word and then stuffing those into the database. They also argue that having them in the db makes them 'more secure' and more 'accessible' to users around the globe.
Does anyone know if the image storage is any better in 2005 than 2000? The .docs & .tifs we used to store just about tripled in size when we put them in the db in 2000. Plus there were the defrag issues and generally it was an unsatisfying experience.
Does anyone know what the advantages/disadvantages of generating Word .xml files might be? Can they be stored as xml data type in SQL Server? Perhaps this is a better option?
If anyone has the time to digest this, please send opinions.
I have developed an application in c#.net 2.0 for Pocket PC. And even i developed a webservice to communicate between sql server 2005 and sql mobile 2005. Webservice returns the data in a dataset format from sql server 2005, but while inserting the data row by row from dataset, it is taking a huge amount of time. I would like to know, is there any way where i can copy the bulk data from dataset into the sql mobile 2005 using c#.And how this can be achieved.
Do anybody know if Analysis Services 2005 allows cashing (storing) calculated members ?
There is a cube in Analysis Services 2000 with a calculated member based on some running sums. The performance of MDXs is too slow because running summs are being recalculated for each member of time dimension on each call.
I think that caching calculated members might help me and hope that this feature exists in Analysis Services 2005 .
My forms are taking user input, then HtmlEncoding them prior to being stored in the SQL DB. For some reason, SQL is storing quotes as � and it is causing the HTML when decoded in the page to not be rendered properly.
Has anyone come across this issue before?
For example (without encoding for readability):
SQL should store the parsed string as: <a href="someurl" class="main">
but for some reason it's being stored as: <a href=�someurl� class=�main�>.
Hello Everyonen and thanks for your help in advance. I am developing a conetnet management system to allow for the storage of articles within a SQL Server 2000 database. I am using FreeTextBox as the editor for users to enter articles. I ahve two questions. First, many of the articles are quite lengthy and including HTML formatting go well beyond 8000 characters. How should I go about storing these articles? Should I use a TEXT datatype, or perhaps split the data into more than one row. This leads to my second quuestion. Many sites that display article type data break the artilce into multiple pages with page numbers or next links to page back and forth. I am not sure hot to go about implmeneting this. Any help on this topic would be greatly appreciated. Thanks.
I have some C# code that iterates through the session state, serializes each object and stores the binary representation in an SQL table with an 'image' column. The problem is: it doesn't work. SQL server doesn't throw an error (at least ADO.NET doesnt propagate it); the table is just left unchanged. The SP works (I tested it with a few simple values); the MemoryStream and byte array are being populated correctly and bound to the parameter correctly.
What am I doing wrong? Anyone have a better approach? I know there is a builtin way of storing state in an SQL server, but I only need to do this once--namely, when a user is redirected from non-secure to secure pages--so I don't want to take that performance hit,
I want to store a multipul paragraphs of information into one field in sql server. It works fine but when I output to html the writing does not have the paragraphs and all the text goes together like one big paragraph.
Hello, We are just setting up SQL Server 2000 and wanted to keep track of all our server settings(everything needed for worst case scenario). Does anybody have a standard template that we could follow to record all our info?
