January 2008
Intermediate to advanced
384 pages
8h 1m
English
Content preview from Joe Celko's Thinking in Sets: Auxiliary, Temporal, and Virtual Tables in SQLBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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3.4. Bit Vector Indexes
The fact that a particular occurrence of an entity has a particular value for a particular attribute is represented as a single bit in a vector or array. Predicates are handled by doing Boolean bit operations on the arrays. These techniques are very fast for large amounts of data and are used by the SAND (née Nucleus) database engine from Sand Technology and Foxpro’s Rushmore indexes.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.