SQL Server Index Rebuild Guide

To regenerate the index, you can follow these steps:

1. Find the indexes that need to be rebuilt: First, use SQL Server Management Studio (SSMS) or query system views to check the current state of the indexes and identify which ones need to be rebuilt.
2. Delete old index: Before regenerating the index, you can choose to delete the old index. You can use the following SQL statement to delete the index:

DROP INDEX index_name ON table_name;

1. Regenerate Index: You can use the following SQL statement to regenerate indexes:

ALTER INDEX index_name ON table_name REBUILD;

1. For large tables, consider using online index rebuild method to avoid locking the table for a long time. The following SQL statement can be used:

ALTER INDEX index_name ON table_name REBUILD WITH (ONLINE = ON);

1. Check the status of the index: After regenerating the index, you can check the index status again to ensure that the index has been successfully regenerated.

Please note that during the process of reindexing, the tables may be locked or performance may be affected. It is recommended to perform this operation during off-peak hours.