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What is the use of non clustered index in table?
Updated 27-Oct-14 6:16am
Herman<T>.Instance 27-Oct-14 12:03pm
PIEBALDconsult 27-Oct-14 12:23pm    
You're thinking about it wrong; the better question is "what is the use of clustered index in a table".
Indices have always been around, clustered indices are a recent addition.

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A nonclustered index is an index structure separate from the data stored in a table that reorders one or more selected columns

1. Nonclustered indexes can often help you find data more quickly than searching the underlying table
2. The nonclustered index can point the Database Engine to the rows in the underlying table
3. Nonclustered indexes are created to improve the performance of frequently used queries not covered by the clustered index or to locate rows in a table without a clustered index

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