Read The Transaction Log (ldf) File. My First Post Ever :)
Sep 27, 2007
Hi!
The purpose is to se history of which user updated, inserted or deleted a row in the database.
Can't seem to find any publications from microsoft on how to parse and interpret the log file.
Any documentation on how the log file is structured?
Is it possible to obtain this information through the system views
I don't want to use triggers.
Thanks
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Jul 28, 2000
our users believe that we lost some valid data, but no one knows who did it,
I thought I can find it from the transaction dumps I take every hour
so ,Can I read Transaction Dumps (*.TRN) file in SQL server 7.0 or Can I get this information through other means.
Thanks for your help
DP
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Dec 6, 2001
Hi all,
I am using SQL 2k on two seperate servers on win 2k advance servers without any service packs. My problem is i am using transactional replication between two servers (SML1 and SML2), SML1 is publisher/Distributor and SML2 is subscriber. My db name on both the server is same. when i am inserting data in db on SML1 it replicates immediately on SML2 but vice versa in not happening. Any help in setting up two way replication is highly appreciated. (There is no timestamp column on table which is used as article and there is PK).
thanks in advance.
Minesh.
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Nov 26, 2007
OBJECTIVE: I would like to read a text file from SQL Server 2000, read the text file content, and load its conntents in a RichTextBoxTHINGS I'VE DONE AND HAVE WORKING:1) I've successfully load a text file (ex: textFile.txt) in sql server database table column (with datatype Image) 2) I've also able to load the file using a Handler as below: using System;using System.Web;using System.Data.SqlClient;public class HandlerImage : IHttpHandler {string connectionString;public void ProcessRequest (HttpContext context) {connectionString = System.Configuration.ConfigurationManager.ConnectionStrings["NWS_ScheduleSQL2000"].ConnectionString;int ImageID = Convert.ToInt32(context.Request.QueryString["id"]);SqlConnection myConnection = new SqlConnection(connectionString);string Command = "SELECT [Image], Image_Type FROM Images WHERE Image_Id=@Image_Id";SqlCommand cmd = new SqlCommand(Command, myConnection);cmd.Parameters.Add("@Image_Id", System.Data.SqlDbType.Int).Value = ImageID;SqlDataReader dr;myConnection.Open(); cmd.Prepare(); dr = cmd.ExecuteReader();if (dr.Read()){ //WRITE IMAGE TO THE BROWSERcontext.Response.ContentType = dr["Image_Type"].ToString();context.Response.BinaryWrite((byte[])dr["Image"]);}myConnection.Close();}public bool IsReusable {get {return false;}}}'>'>
<a href='<%# "HandlerDocument.ashx?id=" + Eval("Doc_ID") %>'>File
</a>- Click on this link, I'll be able to download or view the file WHAT I WANT TO DO, BUT HAVE PROBLEM:- I would like to be able to read CONTENT of this file and load it in a string as belowStreamReader SR = new StreamReader()SR = File.Open("File.txt");String contentText = SR.Readline();txtBox.text = contentText;BUT THIS ONLY WORK FOR files in the server.I would like to be able to read FILE CONTENTS from SQL Server.PLEASE HELP. I really appreciate it.
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Jul 20, 2005
Is there a fairly quick and dirty way to shrink the file size allowedfor a DB on SQL server after the DB is in use?Our old DBA allowed 3 gb for log files and we don't need nearly thatmuch. However, the space is still being used and reserved. Can Ishrink that "maximum" and clear up the space?I don't want to just copy all the tables and primary keys and open anew one with the new data, though that is plan A right now.I cant just change sysfiles, it yells at me.
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Nov 12, 2007
Hi all SSIS experts,
I have a task to read certain columns from the db, convert it into a tab delimted text file and post it in an FTP site.
Please suggest on the steps to accomplish this.
Is SSIS the best way?
Can the same task be accomplished using only sql code.
Regards,
Josiny
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Dec 17, 2007
Hi,
I am looking for a way to read a transaction log in an Excel format, does anyone know how I can do this? I have already looked at the dbcc log(mydb), and its not documented, doesnt give enough info. I am more looking for an open source/free tool or a way to do it in SQL Server.
Thanks much.
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Sep 4, 2006
Hi there,
I need to recover certain transactions that I made on the server.
Those transactions were in scripts and I lost the files.
Is there a way to read the transaction log so that I can see what transactions were executed?
TIA
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May 11, 2004
Hi,
I need to access and read the transaction log and run an update according to the log....is it possible through sqldmo....is there any other methods through which i can do the same
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Dec 1, 2004
Hi,
I wanted to read the transaction log...is there a way??? I want to know the command executed from the transaction logs.
DBCC TRACEON (3604)
select * from ::fn_dblog(1,null)
DBCC LOG (test,-1)
Anything else apart from these??
Regards,
Asha
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May 26, 2006
Hello,
I have following situation:
1st thread: start transaction, update some values in table (with (rowlock))
2nd thread: starts select for this record.
I have tried some possibilities with SET TRANSACTION ISOLATION LEVEL but noone is suitable for me. I would like during such running transaction to have possibility to read but the OLD values (last commited).
Am I able to reach this behaviour with some setting of locks, transaction level?
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Oct 30, 2006
How can I read the content of transaction log?
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Apr 12, 2007
I still have transactions in use mainly to set isolation levels. There are obviously no update/delete statements in them. I'm pretty sure this will still add rows to the transaction log even though there won't be any writes to the db data files. Is it still a critical best practice to use RAID 1/0 instead of RAID 5 for the logs? Looking to re-use some existing storage rather than buy new ones. Thoughts?
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Oct 22, 2007
---------------------------------------------------------------
My Original Post
I have to query n table(NLRImports) using the Distinct keyword, to retrieve a set of ID numbers. ( "Select DISTINCT id_nbr from NLRImport" ).
Now i want to use those values i retrieved, to process the records in the table(NLRImports) 1 by 1. How do i use those ID no's i retrieved as Variables or parameters for my next query?? If this makes sense?
----------------------------------------------------------------
First, thanks for the response.... now here is what im trying to do.
I created a simple application in delphi to import information to a table in MSSql2005. This is some of the resulting columns...
date | id_nbr | account_nbr | sub_account_nbr | ... etc
-------------------------------------------------------------
Now there will be several entries with the same id no but on different dates, so i take it dates would rather be my pkey.
Then i need to take one person's entries(i work on id_nbr) and go thru all the entries taking the earliest date and comparing all the other entries for that person to the first date and select all the dates more than 19 days after the first date and less than 91 days from first date and place it in a new table.
I used cursor s and while loops to kind of get it going but i know that cursors are not really recommended use but the performance implications dont bother with this particular job.
What other ways should i be using to accomplish this?
thanks, i hope this is clear...
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Nov 20, 2000
Does anyone know of a utility to read SQL 7 Transaction Log Backups and present them in a meaningful format?
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May 21, 2006
Hi. I am currently building a blog application, and I need some advice... I have the post title, post date, post by, etc stored in a database table, however I was wondering whether I should store the actual post content in the database as well or in a text file. For example, if the posts get really long would it slow down database performance or would there not be much of a difference? Furthermore, if I wanted to keep the posts private, a text file would not be ideal as it can be accessed easily by surfers... What do you recommend?Thanks a lot
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Apr 15, 2014
We have poor performance spikes on a drive containing our log file but this is only for reads and seems to be at a time when we run a re-index job. If this is a likely correlation as to poor performance in reading the log file, and what reads are done from a log file.
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Oct 4, 2007
Hello,
how can i view the content of a archived (backed up) transaction log?
DBCC LOG only works with online logs.
Thx for your answer
Best regards,
Stefan Ridinger
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Sep 19, 2015
I actually am just looking for some supporting documentation on some facets of SQL Server.As far as I have always known, when anyone does a READ from a SQL Server database (SELCT * from <TABLE>), SQL Server does not create a log record...since there's no data or database structure being modified. A colleague is under the impression READ's are logged operations.
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Jun 10, 2015
I have Full database backup upto previous day and transaction logfile of Today transaction. my database has crashed. I have restored previous day's Full backup. I have faced difficulty to restore today's transaction from today's transaction log. What are the steps to restore full database back and one day's transaction log file. Note: there is no differential database backup and transaction backup.
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Nov 23, 2005
Hello, everyone:
I have a local transaction,
BEGIN TRAN
INSERT Z_Test SELECT STATE_CODE FROM View_STATE_CODE
COMMIT
View_STATE_CODE points to remote SQL server named PROD. There is error when I run this query:
Server: Msg 8501, Level 16, State 1, Line 12
MSDTC on server 'PROD' is unavailable.
Server: Msg 7391, Level 16, State 1, Line 12
The operation could not be performed because the OLE DB provider 'SQLOLEDB' was unable to begin a distributed transaction.
OLE DB error trace [OLE/DB Provider 'SQLOLEDB' ITransactionJoin::JoinTransaction returned 0x8004d01c].
It looks like remote server is not available inside the local transaction. How to handle that?
Thanks
ZYT
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May 13, 2008
Hello Experts,
I am createing one task (user control) in SSIS. I have property grid in my GUI and 2 buttons (OK & Cancle).
PropertyGrid has Properties like SourceConnection, OutputConnection etc....right now I am able to populate Connections in list box next to Source and Output Property.
Now my question to you guys is depending on Source Connection it should read that text file associated with connection manager. After validation it should pick header (first line of text file bases on record type) and write it into new file when task is executed. I have following code for your reference. Please let me know I am going in right direction or not..
What should go here ?
->Under Class A
public override DTSExecResult Execute(Connections connections, VariableDispenser variableDispenser, IDTSComponentEvents componentEvents, IDTSLogging log, object transaction)
{
//Some code to read file and write it into new file
return DTSExecResult.Success;
}
public const string Property_Task = "CustomErrorControl";
public const string Property_SourceConnection = "SourceConnection";
public void LoadFromXML(XmlElement node, IDTSInfoEvents infoEvents)
{
if (node.Name != Property_Task)
{
throw new Exception(String.Format("Invalid task element '{0}' in LoadFromXML.", node.Name));
}
else
{
try
{
_sourceConnectionId = node.Attributes.GetNamedItem(Property_SourceConnection).Value;
}
catch (Exception ex)
{
infoEvents.FireError(0, "LoadFromXML", ex.Message, "", 0);
}
}
}
public void SaveToXML(XmlDocument doc, IDTSInfoEvents infoEvents)
{
try
{
// // Create Task Element
XmlElement taskElement = doc.CreateElement("", Property_Task, "");
doc.AppendChild(taskElement);
// // Save source FileConnection
XmlAttribute sourcefileAttribute = doc.CreateAttribute(Property_SourceConnection);
sourcefileAttribute.Value = _sourceConnectionId;
taskElement.Attributes.Append(sourcefileAttribute);
}
catch (Exception ex)
{
infoEvents.FireError(0, "SaveXML", ex.Message, "", 0);
}
}
In UI Class there is OK Click event.
private void btnOK_Click(object sender, EventArgs e)
{
try
{
_taskHost.Properties[CustomErrorControl.Property_SourceConnection].SetValue(_taskHost, propertyGrid1.Text);
btnOK.DialogResult = DialogResult.OK;
}
catch (Exception ex)
{
Console.WriteLine(ex);
}
#endregion
}
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Jul 2, 2015
I have a filetable that contains a binary file. I need to do a selective read of the file stored in the file table. I can write a C# CLR function that will open the file, read n bytes the from a starting byte. Or I can write a SQL statement that reads the stream in the filetable into a VARBINARY variable using SUBSTRING beginning at the starting byte (offset from 1) for the same n bytes.
Both give me the same result. However, the SQL statement takes considerably longer to read. I know there is overhead in reading through SQL (interpreted language), but the difference in performance is substantial, and I can only attribute this performance degradation if SQL first tries to "load" the entire stream before it identifies the portion of the stream that it needs to read beginning at the starting byte offset.
I wonder if this is the case or if there is another option to read a stream from a filetable directly through SQL queries that is more efficient.
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Mar 24, 2008
Hi All,
I need to read a csv file, which is in remote server using SQl Bulk Insert Command.
Can I read a file Which is in remote server using BULK INSERT.
Thank you.......
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Jan 8, 2002
Anyone reading XML disk-files into SQL Server?
I have a process that I may want to do this with.
It would be a stored procedure that would read the XML attributes into 2 tables, the number of attributes could be 1-N, so I thought XML would be a good choice. Also, one of the attributes could be up to 4000 characters. I think this may limit our options, can 100-150 4000 character strings be passed in a standard call to a query/proc in SQL?
Currently the client application makes round-trip network calls to save upwards of 100 pairs of data. 1 header row, and many detail rows. All within a transaction.
I think If we move an XML file to the SQL box, then do all the import/save work on the "Server" side it would be much better. Cutting the transaction time down a lot by not doing so many round-trips at network speed...
Thoughts?
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Aug 28, 2003
Any one can help me how to read a file(.txt) with in the store procedure?
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Jan 4, 2006
hi,
i have a requirement in which i need to read from a .ini file in the stored procedure of sql server 2K.
is it possible? i tried searching on google but i cannot find anything that can help.
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Feb 14, 2007
Can any one tell me how to read the XML file using sql syntax.
I hav also posted my full requirement why I need to read the XML file in Transact_Sql forum list.
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Jun 6, 2007
Hi All
I am trying to load DBF files into SQL server within CLR (actually if just running the select statement outside, say within the SQLQuery window, i got the same result), but with the following error:
Msg 7314, Level 16, State 1, Line 1
The OLE DB provider "VFPOLEDB" for linked server "MYDBF" does not contain the table "T8866064". The table either does not exist or the current user does not have permissions on that table.
I created the linked server in this way
EXEC sp_addlinkedserver
@server = 'MYDBF',
@provider = 'VFPOLEDB',
@srvproduct = 'My Data',
@datasrc = 'c:data'
i did not create the login since my SQL instance is running under a superaccount with all privilege.
What frustrates me is that i can read most of the dbf files, but just a few of them is not readable.
Can anyone give me some hints on it?
by the way, i am using vfp9.0
thanks
michael
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Jun 6, 2007
Need help reading a binary file see below for details...
I have uploaded a csv file into a sql table.
Now i want to extract the data and insert the data in the csv file into another sql table.
What commands can i use in sql to extract/ read the data ?
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Nov 4, 2003
Hi, I wrote a report builder that creates a CSV file but I can't redirect to the file to view it. ERROR Cannot find the Server!. This works fine on the dev machine but deploy it and it does not.
Dim Conn As New SqlConnection(ConfigurationSettings.AppSettings("ConStr"))
Dim Cm As SqlCommand
Dim dr As SqlDataReader
Dim FileName As String = Guid.NewGuid.ToString & ".csv"
Dim FilePath As String = Server.MapPath("") & "CSVFiles" & FileName
Dim fs As FileStream = New FileStream(FilePath, FileMode.Create, FileAccess.Write)
Dim sw As StreamWriter = New StreamWriter(fs)
Dim Line As String
Dim lItem As System.Xml.XmlElement
Dim i As Int16
If ValidatePage() Then
Cm = New SqlCommand(BuildQuery, Conn)
Conn.Open()
dr = Cm.ExecuteReader()
Dim lXmlDoc As New System.Xml.XmlDocument()
lXmlDoc.LoadXml(txtHXml.InnerText)
For Each lItem In lXmlDoc.DocumentElement.SelectSingleNode("SELECT").ChildNodes
Select Case lItem.InnerText
Case "chkPRId"
Line &= "PR Id,"
Case "chkDateIssued"
Line &= "Date Issued,"
Case "chkOriginator"
Line &= "Originator,"
Case "chkBuyer"
Line &= "Buyer,"
Case "chkVendor"
Line &= "Vendor,"
Case "chkCostCode"
Line &= "Cost Code,"
Case "chkOracleRef"
Line &= "Oracle Reference,"
Case "chkTotal"
Line &= "Total,"
End Select
Next
Line = Line.Substring(0, Line.Length - 1)
sw.WriteLine(Line)
Line = ""
While dr.Read
For i = 0 To dr.FieldCount - 1
Line = Line & dr(i) & ","
Next
sw.WriteLine(Line)
Line = ""
End While
dr.Close()
Conn.Close()
sw.Close()
fs.Close()
Response.Redirect(FilePath)
End If
ResetPage()
PopulateListBoxFromXML()
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Jan 17, 2002
Hi,
I received a SQL Server 6.5 database (.dat and .Log files). I'm currently running 7.0. Is there any way to read/import this data?
I tried to do this:
I have installed SQL Server 6.5. And After install, I have created a database with the same names (.dat an .log) and make it bigger than the first .dat and .log files.
Then, I have stoped the SQL server service, have deleted the .DAT and .LOG files that i have created, and have copied the first .DAT and .LOG in their place. I have Started the SQL server service and the database was beeing suspected. I stil unable to read data.
Can you help me?
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Aug 16, 1999
Hi,
I need to read a binary file with extention *.dat like this:
tat.dat and import it in ms sql server 7.0.
Thanks for any help
Dr Bangaly Diané
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