Using undocumented DBCC WRITEPAGE to instigate SQL Server database corruption
In this tip we look at the undocumented command DBCC WRITEPAGE to corrupt a SQL Server database and then use the command to undo the corruption.
2018-10-01
2,109 reads
Corruption
2018-06-19
8,070 reads
Let’s Corrupt a Database Together, Part 3: Detecting Corruption
Having already shown how to corrupt a database, and then how nonclustered indexes can be corrupted independently, in this post Brent Ozar explains how you can detect corruption.
2017-08-15
6,725 reads
Corrupt Page Notification
This trigger will send mail notification once a row is written in the suspect pages table
2017-03-03 (first published: 2017-02-21)
498 reads
Troubleshooting and Fixing SQL Server Page Level Corruption
Corrupt SQL Server databases are the worst nightmare of any SQL Server professional. In any environment, from small business to enterprise, the compromise of integrity and availability of the data can constitute a business emergency. This is especially the case in those organizations reliant on an OLTP data model, for a high-volume website. SQL Server database corruption and disruption of the transaction processing system can cause business repercussions such as large financial losses, a drop in reputation or customer retention, or contractual SLA problems with the service provider, if not managed in-house.
2013-02-18
3,385 reads
My SQL Server Database is Corrupt - Now What?!
How do you recover from corruption if your organization doesn't have a disaster recovery handbook? And how can you prevent the same corruption from recurring?
2013-01-29
8,419 reads
Repair Corruption Using the Mirror Database in SQL 2005
Explanation of how to repair a database in SQL 2005 Enterprise which is mirrored.
2010-05-10
4,372 reads
Fixing DBCC CHECKDB Msg 8992 Errors
Returning author Wayne Sheffield recently had some database corruption - read about how it was fixed.
2010-03-03
8,706 reads
Recovering data from corrupt tables using non-clustered indexes
At times database corruption happens and no good recovery path is available. It is possible to salvage data from indexes using query hints.
2010-01-19
5,953 reads
SQL Q & A: Database Consistency, Temporary Tables, and More
Why does DBCC CHECKDB find corruption errors that disappear? Does tempdb really cause performance issues? Are there any drawbacks to using the FILESTREAM datatype? Paul Randal answers these reader questions and more.
2009-03-27
4,251 reads
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Question of the Day
The Funny SELECTs
What is returned from this query?
SELECT
( SELECT COUNT (*) FROM Sales.SalesOrderHeader AS soh
WHERE soh.OrderDate > '01/01/2011' AND soh.OrderDate < '01/01/2012') AS OrdersIn2000
, ( SELECT COUNT (*) FROM Sales.SalesOrderHeader AS soh
WHERE soh.OrderDate > '01/01/2012' AND soh.OrderDate < '01/01/2013') AS OrdersIn2001
, ( SELECT COUNT (*) FROM Sales.SalesOrderHeader AS soh
WHERE soh.OrderDate > '01/01/2013' AND soh.OrderDate < '01/01/2014') AS OrdersIn2002; See possible answers