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Demystifying Oracle's Clustering Factor

One of the more confusing statistics in Oracle is one called the clustering factor. Associated with an index, it's actually dependent on the table data, more specifically the distance between 'jumps' for a given index key. Commonly, a 'jump' is the number of blocks between rows containing the given index key starting with the first block found containing that key. If that sounds confusing don't despair, David Fitzjarrell explains in detail.

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Question of the Day

QUOTENAME Quote Parameters

When I use QUOTENAME(), I can optionally provide the character used to surround the string in the result. Can I use any character?

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