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Question

What can be done to improve the selectivity of a non-highly selective column for B-Tree indexing?

a.

Create a clustered index

b.

Create a composite index

c.

Create a hash index

d.

Concatenate the column with another column with higher selectivity

Answer: (d).Concatenate the column with another column with higher selectivity Explanation:To improve the selectivity of a non-highly selective column for B-Tree indexing, you can concatenate the column with another column with higher selectivity.

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Q. What can be done to improve the selectivity of a non-highly selective column for B-Tree indexing?

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