Encyclopedia
Join selection factor
Within computing, author O'Connell defines join selection factor as "[t]he percentage (or fraction) of records in one file that will be joined with records of another file". This can be calculated when two database tables are to be joined. It is primarily concerned with query optimization.
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This article is adapted from the Wikipedia article “Join selection factor”, written by its contributors and licensed under CC BY-SA 4.0. Fathomly has changed the layout, removed citation markers, navigation and maintenance notices, and adjusted punctuation. This adapted version is shared under the same license. For references, see the original article.
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