Which Transact-SQL batch should you use?

You administer a Microsoft SQL Server 2012 database that contains a table named OrderDetail. You discover that the NCI_OrderDetail_CustomerID non-clustered index is fragmented. You need to reduce fragmentation.

You need to achieve this goal without taking the index offline.

Which Transact-SQL batch should you use?
A . CREATE INDEX NCI_OrderDetail_CustomerID ON OrderDetail.CustomerID WITH DROP EXISTING
B . ALTER INDEX NCI_OrderDetail_CustomerID ON OrderDetail.CustomerID REORGANIZE
C . ALTER INDEX ALL ON OrderDetail REBUILD
D . ALTER INDEX NCI_OrderDetail_CustomerID ON OrderDetail.CustomerID REBUILD

View Answer

Answer: B

Explanation:

Reference: http://msdn.microsoft.com/en-us/library/ms188388.aspx