Index is the integral part of SQL database that speeds up the retrieval of rows from table or view. It is well known that SQL server database stores entire data in the form of tables. Operations on these tables can be enhanced using index. You can easily create it using multiple columns of table which can be further used to manage the database. Index is the data structure used to enhance the performance of database by providing fast and easy access to stored data. But sometimes due to some unfavorable reasons it gets corrupted and makes your database inaccessible. It has been observed that SQL index corruption leads to serious data loss situation. If you don’t have valid backup it becomes quite difficult to get back the lost data.

Most of the time it has been observed that you are unable to perform some common operations like update, delete, modify etc on your database table due to occurrence of below error message:

“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'.

"Possible index corruption detected. Run DBCC CHECKDB."

SQL index corruption is the major cause for the occurrence of such types of errors. When you got corrupt database index you are unable to access it as it becomes inaccessible. Most of the data loss problems arise due to index corruption. Generally the index gets corrupted due to some adverse reasons like virus attack, improper shut down of system, power failure, improper maintenance of indexes, bad sectors in hard disk, hard drive failure etc.

To repair the corrupt index and gain access on your damaged database you can use DBCC CHECKDB utility of SQL which is inbuilt recovery command. But in some scenario it fails to repair SQL index corruption. In such situation you can use MS SQL database Repair Software to repair the corrupt database. It safely repairs and restores sql indexes, views, tables, forms, reports, triggers, procedures etc. It supports all versions of SQL server database.