Storing Deleted Rows - Best Method ?
Jun 17, 2002
I need a way of being able to store any rows that are deleted from any of 15 tables.
My current thinking is to have one 'Deleted_Records' table with lots of varchar fields (enough to cater for the largest of the 15 tables) and just adding some SQL to the delete triggers of the 15 tables to write a deleted record(s) into it.
I am not anticipating having to read from this table much. Only in case of emergencies i.e. a user makes a bad mistake and deletes accidentally.
Am using SQL7.
Obviously with cascading deletes quite a few records could be deleted in one delete as it were.
I there a better way of handling this scenario ?
many thanks
Paul
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May 22, 2008
Hi,I have a table which I need to store times in. What is the best way of doing this? The only way I can think of so far is to save the times as a datetime such as '1/1/1900 03:00 PM' then format the date as "hh:mm tt" so that the day isn't displayed. Is this the best method?Thanks,Curt.
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Mar 31, 2008
Let's say you had a User table and one of the fields was called Deceased. It's a simple closed-ended question, so a bit value could be used to satisfy the field, if the person is dead or alive. Let's say another field is called EyeColor. A person can have only one eye color and thus one answer should be stored in this value, so this is easy as well.
Now, let's say I want to store all the languages that a specific user can speak. This isn't as easy as the previous examples since it's not a yes or no or a single-value answer. I haven't had much experience with working with databases so I've come up with two possible ways with my crude knowledge hehe.
In terms of inputting the multi-answer values, I suppose I could use a multiple-selection listbox, cascading dropdowns, etc. Now, here are the 2 solutions that came to mind.....
1) Make a field called LanguagesSpoken in the User table. When I process the selections the user makes on the languages he knows, I can then insert into the LanguagesSpoken field a string "English, Spanish, Czech" or IDs corresponding to the languages like "1, 5, 12" (these IDs would be referenced from a separate table I guess). I would use commas so that later on, when I need to display a user's profile and show the user's languages, I can retrieve that long string from the LanguagesSpoken field, and parse the languages with the commas I've used. Using commas would just be a convention I use so I would know how to parse (I could have used "." or "|" or anything else I guess) the data.
2) Forget about the LanguagesSpoken field in the User table altogether, and just make a LanguagesSpoken table. A simple implementation would have 3 fields (primary key, userId, languageId). A row would associate a user with a language. So I would issue a query like "SELECT * FROM LanguagesSpoken WHERE userId=5" (where userId=5 is some user). Using this method would free me from having to store a string with delimited values into the User table and then to parse data when I need them. However, I'm not sure how efficient this method would be if the LanguagesSpoken table grows really large since the userIds would NOT be contiguous, the search might take a long time. I guess I would index the userId field in the LanguagesSpoken table for quicker access?
OR, I may be going about this the wrong way and I'm way out on left field with these 2 solutions. Is there a better way other than those 2 methods?
I haven't work extensively with databases and I'm just familiar with the basics. I'm just trying to find out the best-practice implementation for this type of situation. I'm sure in the real world, situations like this is very common and I wonder how the professionals code this.
Thanks in advance.
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Jun 4, 2007
Stepping thru the code with the debugger shows the dataset rows being deleted.
After executing the code, and getting to the page presentation. Then I stop the debug and start the
page creation process again ( Page_Load ). The database still has the original deleted dataset rows.
Adding rows works, then updating works fine, but deleting rows, does not seem to work.
The dataset is configured to send the DataSet updates to the database. Use the standard wizard to create the dataSet.
cDependChildTA.Fill(cDependChildDs._ClientDependentChild, UserId); rowCountDb = cDependChildDs._ClientDependentChild.Count; for (row = 0; row < rowCountDb; row++) { dr_dependentChild = cDependChildDs._ClientDependentChild.Rows[0]; dr_dependentChild.Delete(); //cDependChildDs._ClientDependentChild.Rows.RemoveAt(0); //cDependChildDs._ClientDependentChild.Rows.Remove(0); /* update the Client Process Table Adapter*/ // cDependChildTA.Update(cDependChildDs._ClientDependentChild); // cDependChildTA.Update(cDependChildDs._ClientDependentChild); }
/* zero rows in the DataSet at this point */ /* update the Child Table Adapter */ cDependChildTA.Update(cDependChildDs._ClientDependentChild);
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Feb 1, 2008
5 accounts have access to database, is it possible to see or log who deleted any records?
Thank you
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Feb 1, 2006
How do we get the number of rows deleted from a table?
@@rowcount is returning 0
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Jan 20, 2004
Yesterday, I had an occurence where someone (one of our developers :) ) deleted many vital rows in a database. I was able to recover via a backup but I'd like to see what was run to delete those rows, when and who if possible? I have the transaction log and the _log.ldf.
Can I read those somehow to find out this information? I have since added auditing to said tables, but I'd really like to go back and see what happened?
I do know about Lumigent, but is there a different production/solution?
Thoughts?
Thank you
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Jan 7, 2008
Hello all,
I've just deleted some rows by error in one of my tables. I'd like to find out a quick way to retrieve them.
I'm using MSSQL server 2000, version 8.00.194
Thank you in advance
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Mar 1, 2005
I am using merge replication between two servers.
When i insert data into a perticular table ..the data gets deleted after some time.
Anyone faced this problem?
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Mar 8, 2007
Hi
I have a stored procedure which deletes a number of rows from a number of different tables. How to i count/return the number of deleted rows in each table?
Here is my stored procedure if it helps:
set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
go
ALTER PROCEDURE [dbo].[usp_delete_entry]
@new_venue_id int
AS
BEGIN
DECLARE@new_customer_id int
SET @new_customer_id = (SELECT customer_id FROM VENUE WHERE venue_id = @new_venue_id)
DELETE FROM FEATURED WHERE venue_id = @new_venue_id
DELETE FROM FACILITIES WHERE venue_id = @new_venue_id
DELETE FROM SIC WHERE venue_id = @new_venue_id
DELETE FROM SUBSCRIPTION WHERE venue_id = @new_venue_id
DELETE FROM ADMIN WHERE venue_id = @new_venue_id
DELETE FROM VENUE WHERE venue_id = @new_venue_id
DELETE FROM CUSTOMER WHERE customer_id = @new_customer_id
END
thanks
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Mar 4, 2008
If you know how to recover them I will be very pleased whith you.
Thank you.
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Apr 30, 2006
HI, I am wondering if it is possible to retreive this information without using row count transform. Can I get the # of rows inserted/updated or deleted by destination from the log?
Thank you,
Ccote
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May 28, 2015
I have two tables like hyd,hyd1 but hyd has data ,now I want to delete all rows from hyd at the same time insert deleted rows into hyd1.
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Apr 18, 2007
Ok, I've spent a good amount on time on debugging an unupdating scenario in my application. Finally I knew the reason which is very annoying. Either I'm missing something really obvious (I hope so,) or this is a bug.
to reproduce what I'm talking about:
1- create a new win forms application using VS2005 sp1
2- add some SQL Compact Edition data file that have some records from the data menu, you'll get the designer to generate the dataset and everything..
3- drag a table from the data sources window, you'll get the data grid and the navigator on the form
4- add a button and have this in the click event handler:
datasetname.Clear();
TableAdapterName.Update(datasetname);
launch the program, click the button, you'll see the grid get wiped out as it supposed to do. close the program and relaunch. the data is there again (this has nothing to do with the copy always, copy if newer infamous stupidity)
now:
5- edit the click event handler and change it so something like this:
foreach (datasetname.TableRow row in datasetname.Table)
{
row.Delete();
}
TableAdapterName.Update(datasetname);
Launch the program, hit the button, grid wiped out. exit and relaunch. You'll see no data (i.e. the update on table adapter worked alright)
You can also try the GetChanges method on the dataset rightafter you use the clear method and you'd get no deleted records at all.
So, in 100,000+ records dataset, if i need to wipe the thing out and add some new records do i have to loop over every record and call delete (which will take LOTS of time).
I do hope that I'm missing something obvious.
Any help would be highly appreciated.
Thanks.
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Aug 15, 2007
I have a table that sometimes has modifications to column(s) comprising the primary key [usually "end_date"]. I need to audit changes on this table, and naturally, turned to after triggers.
The problem is that for updates, when the primary key composition changes, I'm not able to relate/join using the primary key - obviously, it no longer matches across INSERTED and DELETED. Now, for a single row update, it's easy to check for updates on PK columns and then deduce what changes were made...
So the real question is: are rows in INSERTED and DELETED always in matching order (1st row in INSERTED corresponds to the 1st row in DELETED...)?
I don't want to put a surrogate key (GUID nor IDENTITY) on the base table if at all possible. INSERT... SELECT from the inserted/deleted tables into a temp table with identity column is fine, and is what I'm currently doing; I would like MVP or product engineer level confirmation that my ordering assumption is correct.
Testing using an identity surrogate key on base table, and selecting from the Ins/del tables, and the temp tables without an order by clause seems to always return in proper order (proper for my purposes). I've tested under SQL 2005 RTM, SP1, SP2, and SP2 "3152".
FYI, I've lost the debate that such auditing is better handled by the application, not the database server...
Aside: why doesn't the ROW_NUMBER() function allow an empty OVER( ORDER BY() ) clause? Will SQL ever expose an internal row_id, at least in the pseudo tables, so we can work around this situation?
Thanks
Mike
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Sep 23, 2011
My Client Accidently Deleted Somes Rows From Database Now. Now We are Struggling For Almost 2 Days To Get Them Backup. I Even Checked LDF File From Notepad It Have Those Rows But Not Formatted. (Some Similar Text From Some Column Which Got Deleted.)And The Database has no Backup which i Go to Task -> Restore...Server is Running on Sql Server 2008.
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May 17, 2008
hi there
i am using .net framework 1.1 with SQL 2000 .
i want the data in table to get deleted automatically after 30 days of inserting data.
so how do i achieve this?
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Nov 22, 2007
Hi all,
Can you help me to resolve my problem ? I have to do a simple daily backup system. Source : Flat File; Destination : SQL Server. I want to use the Slowly Changing Dimension component to backup only the new and updated row from my source (Flat File) and put them into SQL Server.
But how can I do to detect deleted rows from my source ?
Any suggestions ?
If it's not clear enough, please ask for more details !
GO
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Sep 8, 2006
i am getting the above error on my database i have 2 rows with the same info on and another 2 with the same info on. example:
ID username password
1 bob bob
1 bob bob
1 john john
1 john john
I know this is a fault with ms sql 2005 however how do i fix it?
Ive found this link which explains everything but how do i start a query. I tried clicking on new query and copying the code. What is table1 meant to be? the database is dbl.tbl_admin. It wont find my database.
Im not sure how to do it anyway.
I need to change it though as its my admin password and Ive given it out to web design companys
http://geekswithblogs.net/allensb/archive/2006/07/27/86484.aspx
Can some 1 read the above page and give me full instructions, I dont know what im doing thanks
info@uktattoostudios.co.uk
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May 10, 2007
Hi,I am trying to write a method which needs to call a stored procedure and then needs to get the response of the stored procedure back to the variable i declared in the method. private string GetFromCode(string strWebVersionFromCode, string strWebVersionString) { //call stored procedure } strWebVersionFromCode = GetFromCode(strFromCode, "web_version"); // is the var which will store the response.how should I do this?Please assist.
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Aug 11, 2004
How many result-rows does mssql return should be used asynchronous method to use mssql cursor, can get the best performance in any time in any result offset?
i want to make the cursor fast in any time whatever how many results returned
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Dec 29, 2006
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?
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Jan 29, 2008
Hi,
I just have a Dataset with my tables and thats it
I have a grid view with several datas on it
no problem to get the data or insert but as soon as I try to delete or update some records the local machine through the same error
Unable to find nongeneric method...
I've try to create an Update query into my table adapters but still not working with this one
Also, try to remove the original_{0} and got the same error...
Please help if anyone has a solution
Thanks
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Jan 10, 2008
Hi,
I have application in which i am performing synchronization between SQL Server 2000 and SQL Server 2005 CE.
I have one table "ItemMaster" in my database.There is no relationship with this table,it is standalone.I am updating its values from Windows Mobile Device.
I am performing below operations for that.
Step : 1 Pull To Mobile
Code BlockmoSqlCeRemoteDataAccess.Pull("ItemMaster", "SELECT * FROM ItemMaster", lsConnectString,RdaTrackOption.TrackingOn);
Step : 2 Using one device form i am updating table "ItemMaster" table's values.
Step : 3 Push From Mobile
Code BlockmoSqlCeRemoteDataAccess.Push("ItemMaster", msConnectString);
So i am getting an error on 3rd step.
While i am trying to push it says,
"The Push method returned one or more error rows. See the specified error table. [ Error table name = ]".
I have tried it in different ways but still i am getting this error.
Note : Synchronization is working fine.There is not issue with my IIS,SQL CE & SQL Server 2k.
Can any one help me?I am trying for that since last 3 days.
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Sep 27, 2007
I just did the dumbest thing ever. I think I have lost my database. i was trying to attach a different db with the same name. but it wasnt able to attach so the i renamed my current db and attached the new db.i dont know what has happened but my old db has been deleted and i cant find it the mdf file for it.... that has been removed for the directory it was in too!! I was using MS SQL Server Managemnent Studio can I undo this somehow?? PLEASE HELP
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Dec 11, 2000
Is it possible to know that who has deleted the database
Thanks in advance
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Jan 21, 2005
Our past CIO deleted a SQL Server database because he didn't know what it was or if we needed it. Guess what we do! We were able to undelete the backup files but when we try to restore from it we get the error "No a valid backup" Any ideas?
Thank you for any help. :eek:
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Jul 25, 2006
I am running sql server 2000 on windows 2000. i have my backups set to delete after a week. they are not deleting, can anyone tell me why this is happening?? the backups filled the hard drive.
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Sep 20, 2007
I am currently trying to recover a data base that i detached. I have search the computer with *.mdf with out results...
I detached the database from msde 2000 and then installed sql express now when i go to attach the db it is missing, is there away i can recover the db?
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Apr 18, 2007
Is there anyway to retreive deleted data (rows) of a table? Unfortunately the backups are corrupt so we can't do a restore.
Thanks
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May 18, 2007
Hi,
I accidentaly deleted a package while working on it, intention was to delete another package just above it in solution explorer but the one i was working on got deleted, is there any way to retrieve it...??
any suggestion wud be appreciated.
thanks,
ravi
Nothing much that i can do..!!
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Jul 23, 2005
I am runnnig Microsoft SQL Server 2000 and have a database that getsdownloaded everymorning from an ftp site. This download contains thenew records and any changes to existing records. However I am runninginto a problem in that I am forced to recreate the views over everytimewe replace the new database with the old one. I've tried restoring thedatabase as well as replacing it and am not sure what I am missing. Iam new to SQL Server and any help would be greatly appreciated.
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Jul 20, 2005
Any ideas how I can recover a job that has been deleted (?) from SQL7.0 ? We had one which was used on a regular basis which has nowceased to exists. I've spoken to the people responsible for the serverand was met by blank faces (as usual). They have no idea when it wasdeleted, by whom or when. To make matters worse, they don't think theycan get it off the backup set without a major bit of work to theserver. Suprisingly, none of the users noticed that things had stoppedworking.Unfortunately, I needed to do some work on this in preparation for mymonthly meeting with my boss on Monday. Whilst I'm not to blame, I'dlike to understand a little more about any options available to us forrecovery as he will undoubtedly ask when he finds out.I have an old back up on another server, so it's not the end of theworld re-creating it, but I was under the impression it was backed upproperly. Is this normal or have they missed something ?Are there any ways I can recover this ? What can I get done to thebackup to make sure this is backed up properly ?Thanks in advance.Ryan
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