Summary: This blog discusses about SQL Server clustered index corruption issue and the ways to fix this error. You can restore the database from backup or use SQL database repair software to resolve the clustered index corruption issue.
Microsoft SQL Server database is used by several medium and large-sized businesses to store and access their large amount of data in a safe and secure way. Although highly reliable the database primary MDF file and secondary NDF file are not immune to turning corrupt.
There can be several reasons behind corruption of SQL database files. One of the reasons is corruption in clustered index of the database that makes the data stored in MDF and NDF files inaccessible. This, of course, would be the worst situation for any DBA working on the particular SQL Server in which the error occurred.
If there is corruption in the clustered index of the database, you may encounter an error message that reads as:
Server: Msg 1902, Level 16, State 3, Line 1
Cannot create more than one clustered index on table ‘Table Name’. Drop the existing clustered index ‘Clustered Index Name’ before creating another.
What Causes SQL Server’s Clustered Index Corruption?
A table can have only one clustered index, as the clustered index dictates the physical storage order of the data in the table. The SQL Server error 1902 indicates that there is more than one clustered index on the table.
How to Fix SQL Server Clustered Index Corruption?
As a table in SQL Server database can have only one clustered index, therefore, it is essential for you to create any additional indexes on the table as non-clustered. Also, if you wish to alter the way in which the SQL database table is clustered, then it becomes necessary to first drop the existing clustered index before creating a new one.
There are two methods to handle corruption in the clustered index of SQL Server. You can either do it by:
- Restoring the backup
- SQL database repair software.
Before trying to fix the corrupted clustered index corruption in SQL database, you must try to find the exact reasons behind corruption. You can do so by using the inbuilt DBCC CHECKDB command. Running this command helps checks the logical and physical integrity of the database and will return you the Database ID, Object ID, and Index ID of the corrupted index.
DBCC CHECKDB (CorruptDBName) With No_InfoMsgs, All_ErrorMsgs,
After checking the index ID, you can easily choose the appropriate action to resolve the issue.
Restore from Backup
If a backup of the SQL server database is present, it can always be restored to get the working copy of the server’s database. However, this method of page-level restoration is useful only when the alterations in the database is less, and only the single page of the index has been damaged. If there is corruption in multiple pages of the clustered database, you would have to perform the database level restoration.
Use SQL Database Repair Software
The other way to handle SQL database clustered index corruption is using a SQL database repair software that is capable of repairing corrupt or damaged Microsoft SQL Server database (MDF) files safely, securely, and successfully. The use of software makes the process fast and eliminates manual intervention. Also, it is the best alternative when you do not have a backup.
The Way Forward – Stellar Repair for MS SQL
The SQL Recovery software easily fixes the clustered index issue. It is an easy-to-use application and provides a number of benefits along with repairing the damaged SQL Server MDF files. Plus, as it is devised with powerful algorithms it never fails. Its additional capabilities are as follows:
- Repairs damaged MDF and NDF files
- Retrieves tables, indexes, triggers, rules, keys, and defaults
- Perform recovery of deleted records
- Searches and recovers specific database objects
- Saves repaired files in MDF (New MS SQL database Or Live MS SQL database), XLS, CSV, and HTML file formats
- Supports MS SQL Server 2019, 2017, 2016 and lower versions
With all the above benefits, handling a corrupt clustered index using Stellar Repair for MS SQL software is the best bet!