Sum Of Column Of Blob Type
Apr 10, 2007
I have a column in my table that is an Image (blob). The data stored
in this blob is basically pdf files. I need a query to determine the
total size of these blob's in the database. Here is what is
happening, if I run it as below I get 23736000 for a result.
select sum(datalength (cast(document AS binary(8000)))) from
plan_report
If I run it like this select sum(datalength (cast(document AS
varbinary(8000)))) from plan_report
I get 23736000 also as a result
If I run it like this select sum(datalength (cast(document AS
varbinary))) from plan_report
I get 89010 this as a result
If I run this: select datalength(document) from plan_report then I
get a result for each row and when I sum those rows I get 5584452854
this as a result.
I do not believe the first 3 queries are returning correct result sets
due to the limit on the fields (binary/varbinary) and since this is an
image field I cannot convert to anything else.....
I am out of ideas, and any help you can give me will be greatly
appreciated...
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Feb 24, 2004
Does anyone have any experience of this type of data please? I have been asked to work on a project where it looks like we will be taking MS Office files and scanned images and storing them in a SQL 2000 db so that they can be aquired by a third party application. I am most intereested in the size of the records as the server may need upgrading, for space and performance.
I am also interested in how a BLOB record is created, is it a particular save process from Word / Excel etc or can you specify to import as a BLOB from a SQL script?
Any info welcomed as i really dont know where to start !!!
TIA
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Oct 30, 2006
Hi,
How do I create a large column type in MSSQL similar to the Blob field in MySql.
I trying to upload data to mssql but keep on receiving the error tat the columns buffer size is not big enough ?
I've tried using varchar with size 8000, but stil NOT working
Any ideas ????
Thanks
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May 26, 2000
1. How many blob data types can be defined in a table on SQL Server 7.0
2. What is the max size for a blob data type.
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Nov 28, 2006
Hi all,
I am trying to store binary datafiles into a SQl Express table. However I can not find the BLOB data type when I am designing the table. Are we limited to using that kind of data type in the Express edition? Thanks.
Ke
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Jul 11, 2005
I am using SqlServer 2000 and Jdbc connectivity in my application on windows.So, when i execute a query on Sqlserver database as :
Select * from DBO.RS_TABLELOB where Rep_sync_id > 15 and Rep_server_name != 'replicator' order by Rep_sync_id;
This problem is only with the BLOB data types in table RS_TABLELOB.
Then i got an error as:
[Microsoft][SQLServer 2000 Driver for JDBC]ResultSet can not re-read row data for column
1.'.'.at com.microsoft.jdbc.base.BaseExceptions.createExcep tion(Unknown Source)at
com.microsoft.jdbc.base.BaseExceptions.getExceptio n(Unknown Source)at
com.microsoft.jdbc.base.BaseResultSet.validateColu mnIndex(Unknown Source)at
com.microsoft.jdbc.base.BaseResultSet.getObject(Un known Source)at
com.microsoft.jdbc.base.BaseResultSet.getObject(Un known Source)
Please help me out, if you have any idea!!!
Thanks in advance
John Berry
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Apr 5, 2008
Hi! I tried to save some image data, but it get truncated at 8000 (the table column is defined as Image). I then wrote a converter to try ntext-datatype instead, but it gets truncated at 4000.
Error message:
System.Data.SqlServerCe: @3 : String truncation: max=4000, len=4168
The code uses only ADO entity framework for database access. Is there a way to store binary data larger than 8000 bytes? I am running SQL Compact 3.5 sp 1 BETA.
Henning
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Oct 21, 2005
Hi experts,
I have a textbox and a upload file function in my asp.net page.User can either copy/paste their resume in text or upload their resume file and submit the application.The uploaded file will be saved into a BLOB column, but do you know if text in textbox can be saved into BLOB column?
I received error message on the code:'save Applicant resume to a BLOB-image datatype column objComd.Parameters.Add(New SqlParameter("@AppResume", SqlDbType.NText))
error:Exception has been thrown by the target of an invocation.Operand type clash:ntext is incompatible with image
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Apr 11, 2006
I use this code to get Tiff files from db , but output file seems to be corrupted :
Dim pubsConn As SqlConnection = New SqlConnection("Server=(local);uid=sa2;pwd=sony;database=pubs;") Dim logoCMD As SqlCommand = New SqlCommand("SELECT pub_id, logo FROM pub_info", pubsConn)
Dim fs As FileStream ' Writes the BLOB to a file (*.bmp). Dim bw As BinaryWriter ' Streams the binary data to the FileStream object.
Dim bufferSize As Integer = 100 ' The size of the BLOB buffer. Dim outbyte(bufferSize - 1) As Byte ' The BLOB byte() buffer to be filled by GetBytes. Dim retval As Long ' The bytes returned from GetBytes. Dim startIndex As Long = 0 ' The starting position in the BLOB output.
Dim pub_id As String = "" ' The publisher id to use in the file name.
' Open the connection and read data into the DataReader. pubsConn.Open() Dim myReader As SqlDataReader = logoCMD.ExecuteReader(CommandBehavior.SequentialAccess)
Do While myReader.Read() ' Get the publisher id, which must occur before getting the logo. pub_id = myReader.GetString(0) ' Create a file to hold the output. fs = New FileStream("\Server1shared1logo" & "KK" & ".tiff", FileMode.OpenOrCreate, FileAccess.Write) bw = New BinaryWriter(fs)
' Reset the starting byte for a new BLOB. startIndex = 0
' Read bytes into outbyte() and retain the number of bytes returned. retval = myReader.GetBytes(1, startIndex, outbyte, 0, bufferSize)
' Continue reading and writing while there are bytes beyond the size of the buffer. Do While retval = bufferSize bw.Write(outbyte) bw.Flush()
' Reposition the start index to the end of the last buffer and fill the buffer. startIndex += bufferSize retval = myReader.GetBytes(1, startIndex, outbyte, 0, bufferSize) Loop
' Write the remaining buffer. bw.Write(outbyte, 0, retval - 1) bw.Flush() ' Close the output file. bw.Close() fs.Close() Loop
' Close the reader and the connection. myReader.Close() pubsConn.Close()
Me.Div1.InnerHtml = ("<embed height=650 width=100% toolbar='' src= '" & "\Server1shared1logoKK.tiff" & "' type='application/x-alternatiff'>")
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Dec 3, 2007
What is the easiest way to calculate the space (size in bytes) used by a BLOB column that is already stored in a particular row?
Thanks.
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May 20, 2015
I have a table in one of my databases that stores files in one of its columns. I need to be able to export this BLOB column into either a CSV or Excel file. I am forbidden from using xp_Cmdshell so I was wondering if there was a way to do this in the Cmd prompt.
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Feb 8, 2007
Hi,
My package dumps the errors into a table. The problem is, it couldnt dump Error Output column to a varchar field. I have added an script component in between to transform to string but no success.
I tried ErrorOutput.GetBlobData(0, ErrorOutput.Length)
but when I query the database, it says "System.Byte[]'
I will appreciate the responses to this post.
Thankyou,
Fahad
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May 23, 2003
I am having a problem with MMSQL BLOB with VB, Sorry to say I am new in Programming using VB 6 and MSSQL and I have never touch BLOB in my live.
I just wish anyone could give me any ideal, like, white pages, or manual on how do I insert BLOB data (Images) to MSSQL 2000 database using VB 6. I need to know exspecially the VB Code and the SQL Portion if you have a store procedure code for that it will be nice.
:confused:
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Jul 6, 2006
I am trying to use the Bulk Insert Task to load from a csv file. My final column is a bit that is nullable. My file is an ID column that is int, a date column that is mm/dd/yyy, then 20 columns that are real, and a final column that is bit. I've tried various combinations of codepage and datafiletype on my task component. When I have RAW with Char, I get the error included below. If I change to RAW/Native or codepage 1252, I don't have an issue with the bit; however, errors start generating on the ID and date columns.
I have tried various data type settings on my flat file connection, too. I have tried DT_BOOL and the integer datatypes. Nothing seems to work.
I hope someone can help me work through this.
Thanks in advance,
SK
SSIS package "Package3.dtsx" starting.
Error: 0xC002F304 at Bulk Insert Task, Bulk Insert Task: An error occurred with the following error message: "Cannot fetch a row from OLE DB provider "BULK" for linked server "(null)".The OLE DB provider "BULK" for linked server "(null)" reported an error. The provider did not give any information about the error.The bulk load failed. The column is too long in the data file for row 1, column 24. Verify that the field terminator and row terminator are specified correctly.Bulk load data conversion error (type mismatch or invalid character for the specified codepage) for row 1, column 23 (cancelled).".
Error: 0xC002F304 at Bulk Insert Task 1, Bulk Insert Task: An error occurred with the following error message: "Cannot fetch a row from OLE DB provider "BULK" for linked server "(null)".The OLE DB provider "BULK" for linked server "(null)" reported an error. The provider did not give any information about the error.The bulk load failed. The column is too long in the data file for row 1, column 24. Verify that the field terminator and row terminator are specified correctly.Bulk load data conversion error (type mismatch or invalid character for the specified codepage) for row 1, column 23 (cancelled).".
Task failed: Bulk Insert Task 1
Task failed: Bulk Insert Task
Warning: 0x80019002 at Package3: The Execution method succeeded, but the number of errors raised (2) reached the maximum allowed (1); resulting in failure. This occurs when the number of errors reaches the number specified in MaximumErrorCount. Change the MaximumErrorCount or fix the errors.
SSIS package "Package3.dtsx" finished: Failure.
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May 27, 2008
Hi All,
i have a table in MS Access with CandidateId and Image column. Image column is in OLE object format. i need to move this to SQL server 2005 with CandidateId column with integer and candidate Image column to Image datatype.
its very udgent, i need any tool to move this to SQL server 2005 or i need a code to move this table from MS Access to SQL server 2005 in C#.
please do the needfull ASAP. waiting for your reply
with regards
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Aug 1, 2006
We are debating what is industry “best practice� for serving huge numbers of images in an industrial scale website. More directly, which approach produces the best performance and the best scalability? For example, how do sites like ebay, Amazon, and other large sites handle the millions or billions of images they must deal with?
Store as BLOB in sql server?
Store in /images folder and store url text into sql server?
We always assumed that the second approach is what most sites must do. But do they?
One developer on our team maintains that storing one million or more image files in a directory will most certainly result in poor performance, because the server must scan the directory, searching for the correct file, each time a web request is made. The directory is not indexed (?) so performance must eventually suffer.
Other developer counters that storing millions of images as BLOBs into sql server will result in poor performance and HUGE database. An additional layer of access (webserver to sql server, back to webserver, then to client) causes a delay and performance hit.
Who is right? What do the gurus as the world class sites do?
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Aug 2, 2006
Hi All,
I am working on a column chart type (stacked column sub-type) report.
Our customer requires us that the space(padding) between the columns should be a constant(including the space between the Y-axis and the first column). I know how to set the width of the columns, but I really don't know how to set the width of the space between them. The columns just varies the space between them automatically according to the number of the columns (the number of the columns is not certain).
Thanks a lot in advance!
Danny
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Sep 7, 2007
Hi guys,
If I have a temporary table called #CTE
With the columns
[Account]
[Name]
[RowID Table Level]
[RowID Data Level]
and I need to change the column type for the columns:
[RowID Table Level]
[RowID Data Level]
to integer, and set the column [RowID Table Level] as Identity (index) starting from 1, incrementing 1 each time.
What will be the right syntax using SQL SERVER 2000?
I am trying to solve the question in the link below:
http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=2093921&SiteID=1
Thanks in advance,
Aldo.
I have tried the code below, but getting syntax error...
ALTER TABLE #CTE
ALTER COLUMN
[RowID Table Level] INT IDENTITY(1,1),
[RowID Data Level] INT;
I have also tried:
ALTER TABLE #CTE
MODIFY
[RowID Table Level] INT IDENTITY(1,1),
[RowID Data Level] INT;
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Jul 20, 2005
I am putting together a SQL table which will hold a latitude andlongitude for each record. An example of a latitude is: 47 05 36.5Which column type would best represent this and retain the spacesbetween degrees, minutes, seconds? Text, varchar, char?ThanksJeffJoin Bytes!
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Jan 2, 2007
Hello,In my web application I am listing steps of action:STEP ACTION10 10.1 10.210.910.1010.203030.1etcHow should I set up my columns in my database? I tryed decimal but the problem is that 10.1 and 10.10 is in theory the same while in my case it is absolutely not. I also tryed nvarchar but does not sort correctly.Should I create 2 int column, one for the main step and another one for the sub-step (one would contain the part before the "." and the other would contain the part after the ".")?Thanks
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Jun 20, 2008
hi
i am trying to modify a column type from smallint to nvarchar(10), i am using the following script :
ALTER TABLE Addresses MODIFY [Floor] NVARCHAR(10)
i am getting :
Msg 102, Level 15, State 1, Line 3
Incorrect syntax near 'Floor'.
what is the problem with that?
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Jun 17, 2005
Hello, I would like to get the columns in a table, this works fine:SELECT syscolumns.* FROM sysobjects INNER JOIN syscolumns ON sysobjects.id = syscolumns.id WHERE sysobjects.name = 'Customers'ORDER BY syscolumns.colidHowever, is there a way to get Column_Data_Type as for example "nchar" or "varchar" instead of having it as numbers.Can anybody help ?thanks
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Aug 1, 2004
I need to stored lots of unsigned 32-bit values. (I'm actually storing IPv4 addresses). These values will frequently exceed 2^31 but never exceed 2^32
My options are:
Use bigint. This is undesirable since this wastes 32-bits of space for every value.
Use int and use the negative value range to get full 32-bits worth of data. In C, it is easy and fast to cast a signed -1 to an unsigned 2^32-1. In SQL, it will be more expensive: Must cast to 64-bit and if val < 0 then val = 2^32 + val.
Is there a better alternative?
Is there a fast (binary) way to cast a value > 2^31 to a negative signed value?
DECLARE @value BIGINT
SET @value = 3000000000
SELECT CONVERT(INT, @value) -- causes error
SELECT CAST(@value AS INT) -- causes error
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Feb 11, 2004
This is an easy one , I need to know the way to check programatically for an SQL server 2000 column data type , if the result is a code , which codes are for the diferent datatypes ( varchar , text , smallint , etc ) , if you send me an url is ok.
thank you
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Jul 20, 2005
Hello,Easy one for the SQL experts.I have a simple table. For the example let's say it looks like this:CREATE TABLE doc_exb ( column_a INT, column_b VARCHAR(20) NULL)Now I want to alter this table and make the column column_a a floatinstead of an INT.How do I do that? I cannot DROP and ADD the column I would lose somevery precious data.Thanks a lot
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Jan 30, 2007
hi
is it possible to find a column's type inside stored procedure?? I am going to get the name of the table and then work with the columns and I just need the type of the column if I have had the name of it
regards
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Mar 10, 2008
Hi,
I'm trying to figure out the best way to determine the data_type of a column, given the table name and column name. Once I've determined it's a charactor string I can get the length using COL_LENGTH, but I can't fund a command or procedure that will return the data type.
Thank you.
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Oct 4, 2007
I was creating a table using MS SQL Server CE using Orcas development environment->Datasources interface. In the list of columns, I couldn't see column type 'Image'. Is there any way I can create a table in CE with column type as 'Image'?
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Aug 20, 2007
How do I programatically change a column (say username) in a table (say tblusers) from varchar(25) to varchar(100)I am looking for something likealter tblusers set username as varchar(100) I know the above statement in nonsensical but it conveys the idea.
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Sep 19, 2007
Hi,How do we use like when we have a column of type TextSelect * from where myColumn LIKE 'prefix%'where myColumn is of type Text in SQL server 2005Thanks.
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Oct 19, 2007
HELLO
i have an sql server database, with a table an some columns.
how can i get the data type of each column and the lengh define in the database table?
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Nov 23, 2007
I want to change a column's data type from bit to int. There are data in the table already. I'm wondering if it is save/correct way to issue the following command to change the data type for that column.ALTER TABLE database_tableALTER COLUMN my_bit_column INT; Thanks.
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Nov 7, 2005
Hi, I want to add a newline in a content of sql column (using t-sql and not asp.net textbox) so when content is being rendered in a .net textbox I get separate rows, so insteadcol1 col2 col3 I woule like to havecol1col2col3Thanks
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