Are you facing error 644 or 8646 while updating or deleting database table, which contains Unicode column with Latin1_General_BIN collation? Are you unable to access your SQL Server database? Database inaccessibility leads to critical situations of data loss and you need to restore the database from most recent backup of your database. However, if the backup is not available, you need to opt for solutions to get your valuable data recovered.

In a practical scenario, you may encounter the following error in SQL Server error log while updating, deleting, or opening a database table:

Error: 644, Severity: 21, State: 5
Could not find the index entry for RID ‘1613b1000000100’ in index page (1:189), index ID 7, database ‘TestDB’..
Error: 8646, Severity: 21, State: 1
The index entry for row ID was not found in index ID 7, of table 2009058193, in database ‘test644’.

At this point, if you run the DBCC CHECKDB statement to check the integrity and consistency of your SQL Server database, it does not report any error related to database or table index corruption discussed here. The DBCC CHECKDB tool may report you the below error message when you apply it on the problem database:

Server: Msg 2511, Level 16, State 1, Line 1
Table error: Object ID 2009058193, Index ID 7. Keys out of order on page (1:189), slots 184 and 185.

The above example of the error message particularly occur on the non-clustered index of MS SQL Server. But, the problem discussed here also occurs with the clustered indexes. Eventually, this behavior renders your precious data inaccessible. In order to get your database repaired and restored at this point, you must identify the cause of this problem and perform SQL Database Recovery by sorting it out.

Resolution

If you encounter the above error message after running DBCC CHECKDB tool on MDF (Master Database File), you need to rebuild indexes of the table that are indicated in error message.

On the other hand, damaged SQL Server database requires MS SQL Recovery to be handled. Recovery is best possible with the help of powerful and advanced third-party applications, known as software.

These software are particularly designed to carry out in-depth scan of entire database and restore all of its objects such as tables, reports, forms, rules, views, triggers, and stored procedures. With read-only conduct and simple user interface, the applications are totally safe and easy to use.

Stellar Phoenix SQL Recovery is the most advanced and efficient application that provides assured recovery in all cases of MDF corruption. The software restore all MDF file objects from Microsoft SQL Server 2008, 2005, and 2000.