The full-text index is one of more useful features of MySQL. About full-text indexes, MySQL assumes that full-text searches will be implemented for sifting through large amounts of natural-language text, it provides a mechanism for retrieving data that produces results that best fit the userís desired result. More specifically, if a user were to search using a string like "MySQL is the world's most popular open source database", the words 'is' and 'the' should play little or no role in determining result relevance. In fact, MySQL splits searchable text into words, by default eliminating any word of three or less than three characters. However, this behavior can be modified with IN BOOLEAN MODE and WITH QUERY EXPANSION modifiers.
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