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Method 1: Create a SQL Server agent job to rebuild indexes and update statistics.However, you can use the following methods to rebuild your indexes:

RDS for SQL Server doesn't have maintenance plans that automatically create plans and jobs to rebuild or reorganize indexes. Reorganize restructures the information on the pages instead of dropping and then re-creating the indexes. Depending on the type of index and the database engine version, a rebuild operation can be done offline or online. Note: Rebuilding an index drops and then re-creates the index. Index fragmentation occurs as gaps in data pages and logical fragmentation. It's a best practice to monitor the level of fragmentation and rebuild and reorganize indexes regularly. Index fragmentation is a critical issue that can cause performance problems in SQL Server databases if they aren't rebuilt promptly.