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What is the basic difference between clustered and a non-clustered index?
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The difference is that, Clustered index is unique for any given table and we can have only one clustered index on a table . The leaf level of a clustered index is the actual data and the data is resorted in case of clustered index . Whereas in case of non-clustered index the leaf level is actually a pointer to the data in rows so we can have as many non-clustered indexes as we can on the db.
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