How do I fix a corrupt index in SQL Server?

Question

As a last resort, run the DBCC CHECKDB command with 'REPAIR_ALLOW_DATA_LOSS' for the database that has corrupted (clustered or nonclustered) index on a table. But this may result in data loss. As an alternative solution, try using a SQL repair tool like Stellar Repair for MS SQL. The tool helps repair database files (. 29 июл. 2021 г.

What causes SQL index corruption?

The probable cause of SQL database index corruption is NOLOCK hint, which causes the query to read a table value incorrectly, or when the query reads the same values in the data multiple times.

Where can I find corrupted index in SQL Server?

You can check if index is corrupted in SQL Server by fetching some rows that may possibly have different or deleted values. Running a simple command to ROWID values will result in some missing entries. When a user checks log reports, it indicates that the records were edited more than one times.

How do I restore an index in SQL?

sp_helpindex is a system stored procedure which lists the information of all the indexes on a table or view. This is the easiest method to find the indexes in a table. sp_helpindex returns the name of the index, description of the index and the name of the column on which the index was created.

How can you rebuild an index?

Rebuild an index1In Object Explorer, Expand the database that contains the table on which you want to reorganize an index.2Expand the Tables folder.3Expand the table on which you want to reorganize an index.4Expand the Indexes folder.5Right-click the index you want to reorganize and select Rebuild.Reorganize and Rebuild Indexes in the Database - BeyondTrust

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