Krish Munot Krish Munot - 1 year ago 54
SQL Question

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Your question is very vague, if you asked the question does an Index take up "extra" space? Then the answer would be ......

No not in the case of a Clustered Index, a clustered index is the actual data stored in a sorted manner.

But on the other hand Non-Clustered Index is a separate structure to the actual table/data itself, containing pointers to the actual data, in this case Yes it would take up extra space .