Sql Server Case Statements
Stories of SQL Server is full of episodes in which the user is faced with many software and hardware problems that are responsible for the corruption of bases SQL data. Errors indicate l 'deviation from the ideal job, SQL Server must perform. That error is:
"Error 823
I / O error detected during <error> <offset> <operation> offset in the file '<file> ""
Microsoft says this is both in relation to the system or hardware problems with the SQL server. As a consequence, directly or indirectly, this may cause you to fall into The SQL recovery, so be prepared for it.
OI / O check error or logic error in the operating system may be the cause Main error messages in the class indicated the cause of logic. While the operating system error, either to read or write call to the Windows API becomes on success, error 823 can be generated. Moreover, if this call goes out the same success and logical controls the specific data are not successful, this form of the category of I / S error handling logic. Run DBCC CHECKDB and solve this problem and if still, the error 823 is a headache, seeing the problem from the hard drive problem or point of view. In some cases, this may also happen that the database can remain logically damaged, even after the execution command, use the utility to repair the SQL and proceed.
If this is the problem of hard disk, which is responsible for the error indicated, replace the hard disk or if possible, is resources. The 823 errors related to the error, there are many possibilities for the disc. How the problem by checking the event log on the Microsoft system Windows NT for errors.
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Joe Celko recalls an old-school pre CASE statement trick