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You work on an OLTP database that has no memory-optimized file group defined.

You have a table named tblTransaction that is persisted on disk and contains the information described in the following table:

Users report that the following query takes a long time to complete.

You need to create an index that:

• improves the query performance
• does not impact the existing index
• minimizes storage size of the table (inclusive of index pages).

What should you do?

A. Create a clustered index on the table.

B. Create a nonclustered index on the table.

C. Create a nonclustered filtered index on the table.

D. Create a clustered columnstore index on the table.

E. Create a nonclustered columnstore index on the table.

F. Create a hash index on the table.

Explanation:

A filtered index is an optimized nonclustered index, especially suited to cover queries that select from a well-defined subset of data. It uses a filter predicate to index a portion of rows in the table. A well-designed filtered index can improve query performance, reduce index maintenance costs, and reduce index storage costs compared with full-table indexes.