Is there anyway in SQL Server to rollback an SQL statement which was
already executed. I know there is a transaction log but what it
contains and how it works is still a mystery to me.
Assuming I delete all records from a table - can I somehow undo this?
I accidentaly deleted data from the wrong table. Is there a way to un-delete what I had deleted.
need help ASAP.
Regards,
Steve
Hello all,
I know that Oracle uses undo table spaces or rollback segments as its undo mechanism. what does Microsoft SQL Server use as its undo mechanism?
Krz
I'm confused how the undo works when you restore WITH STANDBY
Suppose I restore WITH STANDBY
FULL
DIFF
LOG A
LOG B
LOG C
How do I undo LOG C? Do I restore LOG B again?
Hello !
I have a big problem. I need to go back un changes that had been since the a specific date (beginning of november in my case).
Thanks a lot for any help on how to do this !
Regards,
Fabianus
my favorit hoster is ASPnix : www.aspnix.com !
if we kill sp, let's say, on the third statement, will the first two
be rolled back (undo) ?
How come Undo button does not work? Thanks.
View 2 Replies View RelatedI have update a table field and I like to know how do you "undo" the update? I set the field_length from 6 to 7 and like to undo this.Here is my command:
table = template_fileds
column= field_length.
filed name= field_name.
update template_fields set field_length='7' where field_name='assesscode9'
Muhammad Qasim writes "i hav query that i was just taking the backup of the database n by mistake i just clicked restore as the wizards are similar so i just restored the database to 10days old backup n now i have no latest backup so how can i just undo this restore if u hav any idea of how to overcome this plz reply as early possible lookin for replies"
View 4 Replies View Relatedhai to every one,
i am pavan working as oracle dba. in oracle we have undo table space.
when we issue rollback oracle gets old image from undo tablespace.
in sql server where it gets from old image.
who performs instance crash recovery(which back ground is responsible for it)
in sql server we have logwriter, lazy writers(back ground processes)
what are the other processess.
and some doubts are
how insert query works
how update query works,
how select query works.
means i issue update statement. command successfully executed. late issue rollback, from where sql server gets old imege of the data
please send me any archetecture book /pdf/online link
thanks
kumar
pavan
Associate Oracle DBA
Hello,Somebody accidently deleted a record with cascade deletesand took out about 80 records.The database has been used heavily since then.How do I put back the data?I have spent hours researching BOL and all I can findis how to restore the database to a point in time.But that will lose all the work done after the mistake.(We do a full backup every week and log backup every day)Is there a standard way to do this?Morgan
View 2 Replies View Related
Hi
Can somebody advice me on this:
I am trying to update a row, which is being pulled from another table.
i.e., I have two tables T1 and T2
I am getting a row from T2 and inserting it in T1
then I am updating that row in T1
What i want is if in case these is an error while updating this row I want to remove the row from T1
T1 and T2 are same.
declare @err1 int
--BEGIN TRANSACTION
INSERT INTO dbo.T1 SELECT * FROM dbo.T2 WHERE UpdateFlag = 'Y' AND ID = '12345'
BEGIN TRY
UPDATE dbo.T1 set ReportDate= '9910-12-2006'
SET @Err1 = @@error
END TRY
BEGIN CATCH
insert into errorlog values (error_message())
END CATCH
--if @err1<>0
--begin
--Rollback transaction
--end
This work fine but I am not able to roll back the transaction
When I activate the codes fro roll back, it not performing the Logging operation in CATCH also terminating
REQUIREMENT
1) Get the record in T1 from T2
2) Update the record in T1
3) IF step:3 good commit it, else remove the only the row which was pulled from T2. It must do this also log in dbo.ErrorLog the errored system message error_message()
Thanks a lot in advance
Hi ,
I was working in the SSIS designer and when I found that the DataFlow task I deleted was indeed something I needed, I tried to Undo the operation but Alas the option is not enabled :(
Is there a way we can undo the operations?
I often run queries in Query analyzer. Today I accidentaly deleted some data from a table. Is their a way to undo the last SQL command executed?I have heard of the rollback command, but I don't know if that is applicable or not?
View 6 Replies View RelatedI have full Recovery mode.
I just accidently deleted a handful of records out of a table about 10 minutes ago. My last backup was last night.
Can I go back 10 minutes ago for a specific table? If so how... DO I need to backup now, then use the trans-logs to recover up to a specific point?
Thanks!!
USE [master]
RESTORE DATABASE [EmployeeRecovered] FROM DISK = N'D:BackupsNormalEmployeeFULL.BAK' WITH FILE = 1,
MOVE N'Employee' TO N'D:MSSQLDATAEmployeeRecovered1.mdf',
MOVE N'Employee_log' TO N'D:MSSQLLOGEmployeeRecovered1_log.ldf',
NOUNLOAD, STATS = 5, NORECOVERY
[Code] ....
Now I realze the recovery point is somewhere in TranBackup2.trn and need to go back to the state where only TranBackup1.trn is applied. How can i do this ?
currently i m developing a web application with using sql server 2005
and i was testing yesterday a sql update query with sql server management studio.
in my update query i forgot to put where condition and now all the rows of table are updated. is there any solution to undo this and retrieve all rows back?
Regards Selena
Hi,
I am in a process of designing a web application (ASP.NET) which is mostly data driven. The application needs to provide an undo functionality to users for eg. Undo an Add, Update or Delete that has been already committed to the database.
We are using SQL Server 2005 at back end. What I need to know is how will I enable this feature at database level. I am sure we might have to play with triggers but that too might not help in achieving the UNDO functionality. If anyone can shed light on how to achieve this, it will be quite helpful. Thanks
1. A few months ago, I received a request to deny delete to a group (Windows AD login) against 3 databases. So I issued a DENY DELETE to the relevant Windows login.
2. Now, someone is having trouble updating data. The issue seems to be that a trigger fires during the update. In the trigger the code tries to delete from a table in the previously delete-denied databases. So the update fails.
-- In retrospect, perhaps I should have used REVOKE - not sure
-- Also, I can't seem to find a listing of the DENY permissions - or rather, how to list what permissions are denied. I guess maybe that is a hard thing to do if the result of a DENY is to leave certain permission columns NULL (vs adding 'DENY'). But it would be useful for me to see what the current permission state is.
-- Finally, I tried to undo the DENY without success. Here is my attempt.
a. I tried GRANT DELETE... - no luck
b. Then I saw an article explaining to use REVOKE, so I tried 'REVOKE DELETE' followed by 'GRANT DELETE' - still no luck.
I have a table with 1 million records. I want to update only 400 records. The update statement is provided by a 3rd party vendor. Once i run the update statement it will update all the 400 records. Once the table is updated the users will validate the table
if the update is successful or not. What i'm looking for is:
1) Is there a way to identify what records were updated.
2) If the update done is not what the users wanted i need to undo and bring back the 400 records to their previous values.
I'm on sql server 2008.
I received an alert from one of my two secondary servers (all servers are running 2012 SP1):
File 'E:SQLMS SQL ServerMSSQL11.MSSQLSERVERMSSQLDATAMyDatabaseName_DateTime.tuf' is not a valid undo file for database 'MyDatabaseName (database ID 8). Verify the file path, and specify the correct file.
The detail in the job step shows this additional information:
*** Error: Could not apply log backup file 'MyDatabaseName_DateTime.trn' to secondary database 'MyDatabaseName'.(Microsoft.SqlServer.Management.LogShipping) ***
*** Error: Table error: Page (0:0). Test (m_headerVersion == HEADER_7_0) failed. Values are 0 and 1.
Table error: Page (0:0). Test ((m_type >= DATA_PAGE && m_type <= UNDOFILE_HEADER_PAGE) || (m_type == UNKNOWN_PAGE && level == BASIC_HEADER)) failed. Values are 0 and 0.
Table error: Page (0:0). Test (m_freeData >= PageHeaderOverhead () && m_freeData <= (UINT)PAGESIZE - m_slotCnt * sizeof (Slot)) failed. Values are 0 and 8192.
Starting a few minutes later, the Agent Job named LSRestore_MyServerName_MyDatabaseName fails every time it runs. The generated log backup, copy, and restore jobs run every 15 minutes.
I fixed the immediate problem by running a copy-only full backup on the primary, deleting the database on the secondary and restoring the new backup on the secondary with NORECOVERY. The restore job now succeeds and all seems fine. The secondaries only exists for DR purposes - no one runs reports against them or uses them at all. I had a similar problem last weekend on a different database that is also replicated between the same servers. I've been here for over a year, and these are the first instances of this problem that I've seen. However, I've now seen it twice in a week on the same server.
I am currently having this problem with gridview and detailview. When I drag either onto the page and set my select statement to pick from one table and then update that data through the gridview (lets say), the update works perfectly. My problem is that the table I am pulling data from is mainly foreign keys. So in order to hide the number values of the foreign keys, I select the string value columns from the tables that contain the primary keys. I then use INNER JOIN in my SELECT so that I only get the data that pertains to the user I am looking to list and edit. I run the "test query" and everything I need shows up as I want it. I then go back to the gridview and change the fields which are foreign keys to templates. When I edit the templates I bind the field that contains the string value of the given foreign key to the template. This works great, because now the user will see string representation instead of the ID numbers that coinside with the string value. So I run my webpage and everything show up as I want it to, all the data is correct and I get no errors. I then click edit (as I have checked the "enable editing" box) and the gridview changes to edit mode. I make my changes and then select "update." When the page refreshes, and the gridview returns, the data is not updated and the original data is shown. I am sorry for so much typing, but I want to be as clear as possible with what I am doing. The only thing I can see being the issue is that when I setup my SELECT and FROM to contain fields from multiple tables, the UPDATE then does not work. When I remove all of my JOIN's and go back to foreign keys and one table the update works again. Below is what I have for my SQL statements:------------------------------------------------------------------------------------------------------------------------------------- SELECT:SELECT People.FirstName, People.LastName, People.FullName, People.PropertyID, People.InviteTypeID, People.RSVP, People.Wheelchair, Property.[House/Day Hab], InviteType.InviteTypeName FROM (InviteType INNER JOIN (Property INNER JOIN People ON Property.PropertyID = People.PropertyID) ON InviteType.InviteTypeID = People.InviteTypeID) WHERE (People.PersonID = ?)UPDATE:UPDATE [People] SET [FirstName] = ?, [LastName] = ?, [FullName] = ?, [PropertyID] = ?, [InviteTypeID] = ?, [RSVP] = ?, [Wheelchair] = ? WHERE [PersonID] = ? ---------------------------------------------------------------------------------------------------------------------------------------The only fields I want to update are in [People]. My WHERE is based on a control that I use to select a person from a drop down list. If I run the test query for the update while setting up my data source the query will update the record in the database. It is when I try to make the update from the gridview that the data is not changed. If anything is not clear please let me know and I will clarify as much as I can. This is my first project using ASP and working with databases so I am completely learning as I go. I took some database courses in college but I have never interacted with them with a web based front end. Any help will be greatly appreciated.Thank you in advance for any time, help, and/or advice you can give.Brian
View 5 Replies View RelatedOk I have a query "SELECT ColumnNames FROM tbl1" let's say the values returned are "age,sex,race".
Now I want to be able to create an "update" statement like "UPATE tbl2 SET Col2 = age + sex + race" dynamically and execute this UPDATE statement. So, if the next select statement returns "age, sex, race, gender" then the script should create "UPDATE tbl2 SET Col2 = age + sex + race + gender" and execute it.
hiI need to write a stored procedure that takes input parameters,andaccording to these parameters the retrieved fields in a selectstatement are chosen.what i need to know is how to make the fields of the select statementconditional,taking in consideration that it is more than one fieldaddedfor exampleSQLStmt="select"if param1 thenSQLStmt=SQLStmt+ field1end ifif param2 thenSQLStmt=SQLStmt+ field2end if
View 2 Replies View RelatedHi guys,
I have the query below (running okay):
Code Block
SELECT DISTINCT Field01 AS 'Field01', Field02 AS 'Field02'
FROM myTables
WHERE Conditions are true
ORDER BY Field01
The results are just as I need:
Field01 Field02
------------- ----------------------
192473 8461760
192474 22810
Because other reasons. I need to modify that query to:
Code Block
SELECT DISTINCT Field01 AS 'Field01', Field02 AS 'Field02'
INTO AuxiliaryTable
FROM myTables
WHERE Conditions are true
ORDER BY Field01
SELECT DISTINCT [Field02] FROM AuxTable
The the results are:
Field02
----------------------
22810
8461760
And what I need is (without showing any other field):
Field02
----------------------
8461760
22810
Is there any good suggestion?
Thanks in advance for any help,
Aldo.
I've have a need with SQL Server 2005 (so I've no MERGE statement), I have to merge 2 tables, the target table has 10 fields, the first 4 are the clustered index and primary key, the source table has the same fields and index.Since I can't use the MERGE statement (I'm in SQL 2005) I have to make a double step operation, and INSERT and an UPDATE, I can't figure how to design the WHERE condition for the insert statement.
View 2 Replies View Relatedi was tasked to created an UPDATE statement for 6 tables , i would like to update 4 columns within the 6 tables , they all contains the same column names. the table gets its information from the source table, however the data that is transferd to the 6 tables are sometimes incorrect , i need to write a UPDATE statement that will automatically correct the data. the Update statement should also contact a where clause
the columns are [No] , [Salesperson Code], [Country Code] and [Country Name]
i was thinking of doing
Update [tablename]
SET [No] =
CASE
WHEN [No] ='AF01' THEN 'Country Code' = 'ZA7' AND 'Country Name' = 'South Africa'
ELSE 'Null'
END
What is the best way to script this
Hello friends,
I want to use select statement in a CASE inside procedure.
can I do it? of yes then how can i do it ?
following part of the procedure clears my requirement.
SELECT E.EmployeeID,
CASE E.EmployeeType
WHEN 1 THEN
select * from Tbl1
WHEN 2 THEN
select * from Tbl2
WHEN 3 THEN
select * from Tbl3
END
FROM EMPLOYEE E
can any one help me in this?
please give me a sample query.
Thanks and Regards,
Kiran Suthar
I am attempting to run update statements within a SELECT CASE statement.
Select case x.field
WHEN 'XXX' THEN
UPDATE TABLE1
SET TABLE1.FIELD2 = 1
ELSE
UPDATE TABLE2
SET TABLE2.FIELD1 = 2
END
FROM OuterTable x
I get incorrect syntax near the keyword 'update'.
I am using ASP.NET 2.0, and am attempting to write some code to connect to the database and query a data table. The compiler is not recognizing my SqlConnection statement. It does recognize other commands. And just to make sure, I created other sql objects such as ObjectDataSource and SqlDataSource. The compiler does not find a problem with that code.
Basically the compiler is telling me that I am missing a "using" directive. The compiler is wrong though, because I am including the statement "usingSystemData" Can someone please take a look at my code below and to see if you notice what the problem might be? Note that I numbered the lines of code below. Note that I also tried putting lines 3 trhough 6 before line 2(The page directive) but that did not fix the problem The compiler still gives me the same compiler message.
Compilation Error
Description: An error occurred during the compilation of a resource required to service this request.Please review the following specific error details and modify your source code appropriately.
Compiler Error Message: CS0246: The type or namespace name 'SqlConnection' could not be found (are you missing a using directive or an assembly reference?)Source Error:
Line 21: SqlConnection sqlConn = new SqlConnection("server=localhost;uid=sa;pwd=password;database=master;");
1 <asp:sqldatasource runat="server"></asp:sqldatasource>
2 <%@ Page Language="C#"%>
3 using System;
4 using System.Data;
5 using System.Collections;
6 using System.Data.SqlClient;
7
8 <script runat=server>
9
10 protected void Page_Load(object o, EventArgs e)
11 {
12 ObjectDataSource dsa; // This works no problems from the compiler here
13 SqlDataSource ds; // This works no problems from the compiler
14
15 if (IsPostBack)
16 {
17 if (AuthenticateUser(txtUsername.Text,txtPassword.Text))
18 {
19 instructions.Text = "Congratulations, your authenticated!";
20 instructions.ForeColor = System.Drawing.Color.Red;
21 SqlConnection sqlConn = new SqlConnection("server=localhost;uid=sa;pwd=password;database=master;");
22 String sqlStmt = "Select UserName from LogIn where UserName='" + txtUsername.Text + "' and password='" + sHashedPassword + "'";
23 }
24 else
25 {
26 instructions.Text = "Please try again!";
27 instructions.ForeColor = System.Drawing.Color.Red;
28 }
29 }
30
31 }
32
33 bool AuthenticateUser(string username, string password)
34 {
35 // Authentication code goes here
36
37 }
Hi All,
I've looked through the forum hoping I'm not the only one with this issue but alas, I have found nothing so I'm hoping someone out there will give me some assistance.
My problem is the case statement in my Insert Statement. My overall goal is to insert records from one table to another. But I need to be able to assign a specific value to the incoming data and thought the case statement would be the best way of doing it. I must be doing something wrong but I can't seem to see it.
Here is my code:
Insert into myTblA
(TblA_ID,
mycasefield =
case
when mycasefield = 1 then 99861
when mycasefield = 2 then 99862
when mycasefield = 3 then 99863
when mycasefield = 4 then 99864
when mycasefield = 5 then 99865
when mycasefield = 6 then 99866
when mycasefield = 7 then 99867
when mycasefield = 8 then 99868
when mycasefield = 9 then 99855
when mycasefield = 10 then 99839
end,
alt_min,
alt_max,
longitude,
latitude
(
Select MTB.LocationID
MTB.model_ID
MTB.elevation, --alt min
null, --alt max
MTB.longitude, --longitude
MTB.latitude --latitude
from MyTblB MTB
);
The error I'm getting is:
Incorrect syntax near '='.
I have tried various versions of the case statement based on examples I have found but nothing works.
I would greatly appreciate any assistance with this one. I've been smacking my head against the wall for awhile trying to find a solution.
In the below code i want to use select statement for getting customer
address1,customeraddress2,customerphone,customercity,customerstate,customercountry,customerfirstname,customerlastname
from customer table.Rest of the things will be as it is in the following code.How do i do this?
INSERT INTO EMImportListing ("
sql += " CustId,Title,Description,JobCity,JobState,JobPostalCode,JobCountry,URL,Requirements, "
sql += " IsDraft,IsFeatured,IsApproved,"
sql += " Email,OrgName,customerAddress1,customerAddress2,customerCity,customerState,customerPostalCode,
[code]....
i want to display records as per if else condition in ms sql query,for this i have used tables ,queries as follows
as per data in MS Sql
my tables are as follows
1)material
fields are -- material_id,project_type,project_id,qty, --
2)AB_Corporate_project
fields are-- ab_crp_id,custname,contract_no,field_no
3)Other_project
fields are -- other_proj_id,other_custname,po
for ex :
vales in table's are
AB_Corporate_project
=====================
ab_crp_id custname contract_no field_no
1 abc 234 66
2 xyz 33 20
Other_project
============
other_proj_id other_custname po
1 xxcx 111
2 dsd 222
material
=========
material_id project_type project_id qty
1 AB Corporate 1 3
2 Other Project 2 7
i have taken AB Corporate for AB_Corporate_project ,Other Project for Other_project
sample query i write :--
select m.material_id ,m.project_type,m.project_id,m.qty,ab.ab_crp_id,
ab.custname ,op.other_proj_id,op.other_custname,op. po
case if m.project_type = 'AB Corporate' then
select * from AB_Corporate_project where ab.ab_crp_id = m.project_id
else if m.project_type = 'Other Project' then
select * from Other_project where op.other_proj_id=m.project_id
end
from material m,AB_Corporate_project ab,Other_project op
but this query not work,also it gives errors
i want sql query to show data as follows
material_id project_type project_id custname other_custname qty
1 AB Corporate 1 abc -- 3
2 Other Project 2 -- dsd 7
so plz help me how can i write sql query for to show the output
plz send a sql query