Rollback Accidental Delete From A Table
Oct 22, 2015
I have a client who accidentally deleted data from a table this morning around 10:15 AM. Classic case of accidentally did not highlight the WHERE condition in the DELETE statement and ran it.
1. Database is in Full Recovery mode.
2. Unable to locate the last backup file.
3. Transaction Log file is around 128GB while the mdf is around 212 GB.
Is there a way we could restore the database to a new name and take it back to 10AM, get the table data back and re-insert into the production database?
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Jun 4, 2007
ALTER PROCEDURE discussions_GetTopics(@board_id as int)ASSELECT discussions_Topics.*, discussions_Posts.*, user_1.UserName AS Topic_Author_Username, user_1.UserId AS Topic_Author_ID, user_2.UserName AS Post_Author_Username, user_2.UserId AS Post_Author_IDFROM discussions_Topics INNER JOIN discussions_Posts ON discussions_Topics.topic_id = discussions_Posts.topic_id INNER JOIN aspnet_Users AS user_1 ON user_1.UserId = discussions_Topics.topic_poster INNER JOIN aspnet_Users AS user_2 ON user_1.UserId = discussions_Posts.poster_idWHERE (discussions_Topics.board_id = @board_id) I am simply trying to return a result for each topic, that has user info for both the author of the topic and the author of the last post (user_1, user_2) The problem is, it will return multiple datarows with the same topic, and each of them have a different last post author.. when there can only be one last poster... idk.. im confused.. help?
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Feb 1, 2007
Hi seniors
there are two tables involve in replication let say table1 and replicated table is also rep.table1.
we are not deleting records physically in table1 so only a bit in table1 has true when u want to delete a record but the strange thing is that replication agaent report that this is hard delete operation on table1 so download and report hard delete operation and delete the record in replicated table which is very crucial.
plz let me know where am i wrong and how i put it into right way.
there is no triggers on published tables and noother trigger is created on published table.
regards
Ahmad Drshen
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Oct 23, 2004
Hello:
Need some serious help with this one...
Background:
Am working on completing an ORM that can not only handles CRUD actions -- but that can also updates the structure of a table transparently when the class defs change. Reason for this is that I can't get the SQL scripts that would work for updating a software on SqlServer to be portable to other DBMS systems. Doing it by code, rather than SQL batch has a chance of making cross-platform, updateable, software...
Anyway, because it needs to be cross-DBMS capable, the constraints are that the system used must work for the lowest common denominator....ie, a 'recipe' of steps that will work on all DBMS's.
The Problem:
There might be simpler ways to do this with SqlServer (all ears :-) - just in case I can't make it cross platform right now) but, with simplistic DBMS's (SqlLite, etc) there is no way to ALTER table once formed: one has to COPY the Table to a new TMP name, adding a Column in the process, then delete the original, then rename the TMP to the original name.
This appears possible in SqlServer too --...as long as there are no CASCADE operations.
Truncate table doesn't seem to be the solution, nor drop, as they all seem to trigger a Cascade delete in the Foreign Table.
So -- please correct me if I am wrong here -- it appears that the operations would be
along the lines of:
a) Remove the Foreign Key references
b) Copy the table structure, and make a new temp table, adding the column
c) Copy the data over
d) Add the FK relations, that used to be in the first table, to the new table
e) Delete the original
f) Done?
The questions are:
a) How does one alter a table to REMOVE the Foreign Key References part, if it has no 'name'.
b) Anyone know of a good clean way to get, and save these constraints to reapply them to the new table. Hopefully with some cross platform ADO.NET solution? GetSchema etc appears to me to be very dbms dependant?
c) ANY and all tips on things I might run into later that I have not mentioned, are also greatly appreciated.
Thanks!
Sky
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Nov 17, 2006
I'm trying to clean up a database design and I'm in a situation to where two tables need a FK but since it didn't exist before there are orphaned records.
Tables are:
Brokers and it's PK is BID
The 2nd table is Broker_Rates which also has a BID table.
I'm trying to figure out a t-sql statement that will parse through all the recrods in the Broker_Rates table and delete the record if there isn't a match for the BID record in the brokers table.
I know this isn't correct syntax but should hopefully clear up what I'm asking
DELETE FROM Broker_Rates
WHERE (Broker_Rates.BID <> Broker.BID)
Thanks
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Apr 13, 2000
I am doing the following-
begin transaction
truncate table Acounts
select * from Accounts
rollback
select * from Accounts
The first select is returning 0 rows as expected. But after doing the rollback I expected to yet see 0 rows as truncate is not logged so cannot be rolled back. But to my suprise I see that there are rows.
So the rollback is rolling back the truncate table statement. Can someone please explain this????
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Mar 8, 2007
I have a long query which I have set off and would like to stop, andrename one of the tables used.My query is due to my lack of understanding of the underlyingstructure of MSSQL-Server...So say and update updates TABLE_A and I stop it, whilst thistransaction is rolling back I attempt to rename TABLE_A to TABLE_A_OLDand rename a different table to become TABLE_A. I am assuming thatthe rollback actions will use the object reference of TABLE_A_OLD andcontinue to rollback the effects on the correct table and not corrupt'new' TABLE_A... or will it not allow me to rename TABLE_A until therollback is complete?Thanks for any help!Steve
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Sep 16, 2013
The requirement is: I should allow single row delete from a table but not bulk delete. An audit table should get updated if there is any single delete or single update. So I wrote the triggers as follows: for single and bulk delete
ALTER TRIGGER [dbo].[TRG_Delete_Bulk_tbl_attendance]
ON [dbo].[tbl_attendance]
AFTER DELETE
AS
[code]...
When I try to run the website, the database error I am getting is:Transaction count after EXECUTE indicates that a COMMIT or ROLLBACK TRANSACTION statement is missing. Previous count = 0, current count = 1.
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Jun 18, 2014
I have two tables called ECASE and PROJECT
In the ECASE table there is trigger to get the max value of case_id column in ecase based on project and increment one to that case_id value and insert into ecase table .
When we insert a new record to the ECASE table this trigger calls and insert the case_id column value.
When i run with multiple threads , the transaction is rolled back because of trigger . The reason is , on the project table the lock is happening while getting the max value of case_id column based on project.
I need to prevent the deadlock .
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May 29, 2008
'****************************************************************************
Cmd.CommandText = "Drop Table Raj"
Cmd.ExecuteNonQuery()
Cmd.CommandText = "Select * Into Raj From XXX"
Cmd.ExecuteNonQuery()
'**************************************************************************
This generates error that Table already exist.
If Wait 1 sec then execute statement then it works fine.
Thanks in Advance
Piyush Verma
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Jul 20, 2005
I have two tables that are related by keys. For instance,Table employee {last_name char(40) not null,first_name char(40) not null,department_name char(40) not null,age int not null,...}Employee table has a primary key (combination of last_name and first_name).Table address {last_name char(40) not null,first_name char(40) not null,street char(200) not null,city char(100) not null,...}Address table has a primary key (combination of last_name, first_name andstreet in which (last_name, first_name) reference (last_name, first_name) inemployee table.Now I want to delete some rows in Address table based on department_name inEmployee table. What is sql for this delete?I appreciate your help. Please ignore table design and I just use it for myproblem illustration.Jim
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Jun 29, 2015
I need to delete records from a table (Table1) which has a foreign key column in a related table (Table2).
Table1 columns are: table1Id; Name. Table2 columns include Table2.table1Id which is the foreign key to Table1.
What is the syntax to delete records from Table1 using Table1.Name='some name' and remove any records in Table2 that have Table2.table1Id equal to Table1.table1Id?
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Jul 26, 2004
I have contract table which has built in foreign key constrains. How can I alter this table for delete/ update cascade without recreating the table so whenever studentId/ contactId is modified, the change is effected to the contract table.
Thanks
************************************************** ******
Contract table DDL is
create table contract(
contractNum int identity(1,1) primary key,
contractDate smalldatetime not null,
tuition money not null,
studentId char(4) not null foreign key references student (studentId),
contactId int not null foreign key references contact (contactId)
);
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Mar 17, 2008
I need to delete all records in the TBL_PCL_LENS_DATA table that do not have a corresponding record in the TBL_VERIFICATION table.
Primary Table: TBL_PCL_LENS_DATA
PK: Serial Number
PK: ProcessedDateTime
Child Table: TBL_VERIFICATION
PK: Serial Number
Thanks,
Sean
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Sep 16, 2004
I have one table that has unique id's associated with each row of information. I want to delete rows of information in one table that have a unique ID that references information in another table.
Here is a basic breakdown of what I am trying to do:
Table1 (the table where the rows need to be deleted from)
Column_x (Holds the id that is unique to the various rows of data - User ID)
Table2 (Holds the user information & has the associated ID)
Column_z (holds the User ID)
I tried this on a test set of tables and could not get it to work. What I am trying to do is skip all rows of Table1 that have ID's present in Table2, and delete the rows of ID's that are not present in Table2.
Code:
SELECT Column_z
FROM dbo.Table2
DELETE FROM dbo.Table1
WHERE Column_z <> Column_x
This did not seem to do what I needed, it did not delete any rows at all.
I wanted it to delete all rows in Table1 that did not have a reference to a user ID that matched any ID's in Column_z of Table2
Then I tried another scenerio that I also needed to do:
Code:
SELECT Column_z, Column_a
FROM dbo.Table2
DELETE FROM dbo.Table1
WHERE Column_z = Column_x AND Column_a='0'
'0' being the user id is inactive so I wanted to delete rows in Table1 and remove all references to users that were in an inactive status in Table2.
Neither one of the Queries wanted to work for me in the Query Analyzer when I ran them. It just said (0) rows affected.
Any ideas on what I am doing wrong here?
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May 28, 2015
I have this table:
with actividades_secundarias as (
select a.*, r.Antigo, r.Novo, rn = row_number()
over (PARTITION BY a.nif_antigo, r.novo ORDER BY a.nif_antigo)
from ACT_SECUNDARIAS a inner join
((select
[Code] ....
I want to make a delete statement like this:
select * into #table1 from actvidades_secundarias where rn>1
Delete from act_secundarias where act_secundarias.nif_antigo = #table1.nif_antigo and act_secundarias.cod_cae = #table1.cod_cae
But it seems that I cant delete like this.
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Mar 10, 2000
A table was created in version 6.5 that has 2 blank spaces and a slash '/' in it's name (i.e. Item Type w/Groups). This was done in error and now the table cannot be dropped or renamed and dropped.
Does anyone know how I can delete this table? Please let me know.
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Mar 14, 2007
which one is smarter, where there is no indexing on the table which is really simple table delete everything or recreate table. I got an argument with one of my coworker. He says it doesnt matter i say do delete. Any opinions.
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Jul 20, 2005
SQLLY challenged be gentle --Trying to create code that will drop a table using a variable as theTable Name.DECLARE @testname as char(50)SELECT @testname = 'CO_Line_of_Business_' +SUBSTRING(CAST(CD_LAST_EOM_DATEAS varchar), 5, 2) + '_' + LEFT(CAST(CD_LAST_EOM_DATE AS varchar),4)+ '_' + 'EOM'FROM TableNamePrint @testname = 'blah...blah...blah' (which is the actual tablename on the server)How can I use this variable (@testname) to drop the table? Undersevere time constraints so any help would be greatly appreciated.
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Mar 20, 2008
Hi thanks for looking at my question
Using sqlServer management studio 2005
My Tables are something like this:
--Table 1 "Employee"
CREATE TABLE [MyCompany].[Employee](
[EmployeeGID] [int] IDENTITY(1,1) NOT NULL,
[BranchFID] [int] NOT NULL,
[FirstName] [varchar](50) NOT NULL,
[MiddleName] [varchar](50) NOT NULL,
[LastName] [varchar](50) NOT NULL,
CONSTRAINT [PK_Employee] PRIMARY KEY CLUSTERED
(
[EmployeeGID]
)
GO
ALTER TABLE [MyCompany].[Employee]
WITH CHECK ADD CONSTRAINT [FK_Employee_BranchFID]
FOREIGN KEY([BranchFID])
REFERENCES [myCompany].[Branch] ([BranchGID])
GO
ALTER TABLE [MyCompany].[Employee] CHECK CONSTRAINT [FK_Employee_BranchFID]
-- Table 2 "Branch"
CREATE TABLE [Mycompany].[Branch](
[BranchGID] [int] IDENTITY(1,1) NOT NULL,
[BranchName] [varchar](50) NOT NULL,
[City] [varchar](50) NOT NULL,
[ManagerFID] [int] NOT NULL,
CONSTRAINT [PK_Branch] PRIMARY KEY CLUSTERED
(
[BranchGID]
)
GO
ALTER TABLE [MyCompany].[Branch]
WITH CHECK ADD CONSTRAINT [FK_Branch_ManagerFID]
FOREIGN KEY([ManagerFID])
REFERENCES [MyCompany].[Employee] ([EmployeeGID])
GO
ALTER TABLE [MyCompany].[Branch]
CHECK CONSTRAINT [FK_Branch_ManagerFID]
--Foreign IDs = FID
--generated IDs = GID
Then I try a simple single row DELETE
DELETE FROM MyCompany.Employee
WHERE EmployeeGID= 39
Well this might look like a very basic error:
I get this Error after trying to delete something from Table €œEmployee€?
The DELETE statement conflicted with the
REFERENCE constraint "FK_Branch_ManagerFID".
The conflict occurred in database "MyDatabase",
table "myCompany.Branch", column 'ManagerFID'.
Yes what I€™ve been doing is to deactivate the foreign key constraint, in both tables when performing these kinds of operations, same thing if I try to delete a €œBranch€? entry, basically each entry in €œbranch€? and €œEmployee€? is child of each other which makes things more complicated.
My question is, is there a simple way to overcome this obstacle without having to deactivate the foreign key constraints every time or a good way to prevent this from happening in the first place? Is this when I have to use €œON DELETE CASCADE€? or something?
Thanks
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Aug 18, 2015
How to purge data in transaction table or we can delete some data and store in separate table in data warehouse?
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Nov 17, 2005
lets say i have 100 employees on Table A and I have 10 employees on Table B. I want to delete all the employees in Table A that are in Table B. Delete From TableA Where EmpNum = (Select EmpNum From TableB)The above SQL wont work but i am looking for something similar. any ideas?
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Dec 12, 2007
Hi Friends...
In general we cannot delete a table if it refers another table. But in the process of backup and restore, we need to delete all the tables, so we have return an asp.net function...
Dim Datatable As String
Dim ds As New DataSet
ds = gDatabase.ExecuteQuery(" select Table_Name from Information_schema.Tables where Table_type='TABLE'")
If ds.Tables.Count > 0 Then
If ds.Tables(0).Rows.Count > 0 Then
Dim dr As DataRow
Dim da As SqlCeDataAdapter
Dim Cmd As String
For Each dr In ds.Tables(0).Rows
Datatable = dr.Item("Table_name")
Cmd = "Delete from [" & Datatable & "]"
gDatabase.ExecuteNonQuery(Cmd)
Next
End If
End If
we got an error like
"Msg 4712, Level 16, State 1, Line 1
Cannot truncate table 'Electricalworks' because it is being referenced by a FOREIGN KEY constraint.
"
how to override these errors, if we have to delete all the tables. We have about 200 tables.
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Apr 2, 2008
I have two tables;
Table A
id, name
101, jones
102, smith
103, williams
104, johnson
105, brown
106, green
107, anderson
Table B
id, name, city, state
101, jones, des moine, Idaho
103, williams, Corvallis, Oregon
104, johnson, Grand Forks, North Dakota
105, brown, Phoenix, Arizona
107, anderson, New York, New York
I need to delete records from Table A that are not in Table B. My front end is writen in .net and I am using Data Access Layer along with a Business Logic Layer for data interaction.
I have tried at least seven variations of joining, right outer join, left outer join resulting in wiping our the entire table or nothing at all; not to mention deleting the record that ought to remain and keeping the record that needs to be deleted!
In my BLL I tried to capture the rowsAffected for the deletion by using-without success.
Dim rowsAffected As Integer = Adapter.ID_Deletion(ID)
If rowsAffected = 1 Then
Exit Function
Else
Return rowsAffected = 1
End If
Please help.
MsMe.
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Jul 9, 2001
I need to delete approx 300 tables from a database. Does anyone know the best way to do this.. Thanking you in advance.
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Aug 6, 2002
A user table in a database has somehow been marked as a system table. Is there any way, short of dropping and rebuilding the database to remove this table?
Thanks,
Robert
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Jan 31, 2007
Good evening everyone,I have a problem with deleting a record in a table.
I have the table:
create table Employee(eid integer not null,
shop_id integer,
fname varchar(20),
lname varchar(20),
primary key (eid),
foreign key (shop_id) references Store);
create table Store(sid integer,
address varchar(20),
primary key (sid));
I have inserted many Employees and when i do select they work fine.
The problem is with Delete e.g. i want to delete the Employee with Eid = 12 i do:
Delete from Employee where shop_id = '12'
and it says
ERROR at line 1:
ORA-02292: integrity constraint (user....) violated - child
record found
What do i do wrong?
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Sep 10, 2007
Hello - I inserted a row and now need to delete it. Is there a simple query to delete the last row inserted into a table?
Thanks for your help!
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Apr 3, 2008
I've a table with a size of ~4G and 6million rows in SQL server 2005.
Deleting all rows from it it takes closer to an hour and uses
~20G of transaction log. I wasn't able to truncate it due to FK's, but
should I not be able to truncat it by disabling FKs - how can I do
that? Or how can I expedite this delete because it;s annoying to let
server use 20G log for 4G table. My DB recovery model is set to SIMPLE
(for minimum logging)
TIA,
DataDealer
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Mar 25, 2007
I have a table in a SQLEXPRESS database that I read in C# app. It supposed to have only two rows but a number of fields with Float or Int type parameters. It is a tedious process to tune them all up in the app. The table is used for storage, naturally.
For some reason, I won't go into I ended up with having 3 rows in this table at this point. This third row is identical to the first one in the values of all fields. It happened because I deleted a column that made these rows not unique and after that the trouble began. Before deletion of that column I had 4 rows, then I deleted the 3rd one and row #4 moved in place of #3.
For the life of me I cannot delete this 4th row no matter what I do. It gives me an error:
No rows were deleted. Problem occured while deleting row1 (sic!, I am trying to delete row #3 in fact). The row values updated or deleted either do not make the row unique or they alter multiple rows (2 rows).
Good grief! This is why I am trying to delete this row!
It does not allow me to edit the fields to change the values to make them not unique. The same error pops up. It does not allow me to change the values of the first row which is identical to the third one.
It is not the first time this happened. I had it once or twice before. Back then I had to truncate the table and enter new values from scratch I am kind of tired of doing it.
What is the way to handle this strange behavior?
Thanks.
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Jan 31, 2008
Hi
Somebody delete my table in sql server. How can i identify that (who delete this, datetime, etc). Is there any way in sql server 2000 / 2005
Thanks in advance
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Aug 12, 2007
Can someone help me with how I should set the relationship in my address tables and how they will affect the deleting of a client?
So, if I have:
tblClients ClientID
tblClientAddresses AddressID
tblClientAddressLinks AddressID, ClientID
Currently I have them set as a 1-M from tblClients to tblClientAddressLinks and a 1-M from tblClientAddresses to tblClientAddressLinks
If I try and delete a client and there address is shared wont this go very wrong?
So here is what happens when I try and delete a client:
The DELETE statement conflicted with the REFERENCE constraint "FK_tblClientAddressLinks_tblClients". The conflict occurred in database "DBSQL2", table "dbo.tblcLIENTAddressLinks", column 'clientID'.The statement has been terminated.
Here is what happens when I try and delete an address:
The DELETE statement conflicted with the REFERENCE constraint "FK_tblClientAddressLinks_tblClientAddresses". The conflict occurred in database "DBSQL2", table "dbo.tblClientAddressLinks", column 'Address_ID'.The statement has been terminated.
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Aug 25, 2007
Hi how do i to delete a table with a foreign key?
When i try to delete the table i get error 3726
any?
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