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You have a database named DB1 that contains a table named Table1. Tabe1 has a non-clustered index named index1. You discover that index1 is corrupt. You need to repair index1. Which statement should you execute?
Correct Answer: B
Explanation/Reference: Explanation: If REBUILD is performed online (ON) the data in this table is available for queries and data modification during the index operation. Incorrect Answers: A: REPAIR_FAST maintains syntax for backward compatibility only. No repair actions are performed. D: DATA_PURITY causes DBCC CHECKDB to check the database for column values that are not valid or out-of-range. References: https://docs.microsoft.com/en-us/sql/t-sql/statements/alter-index-transact-sql?view=sql-server-2017 https://docs.microsoft.com/en-us/sql/t-sql/database-console-commands/dbcc-checkdb-transact-sql? view=sql-server-2017