Operator
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Meaning
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By default (when neither plus nor minus is specified) the word is optional, but the rows that contain it will be rated higher. This mimics the behavior of MATCH() ... AGAINST()DR
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+
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A leading plus sign indicates that this word must be present in every row returned.
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-
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A leading minus sign indicates that this word must not be present in any row returned.
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< >
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These two operators are used to change a word's contribution to the relevance value that is assigned to a row. The < operator decreases the contribution and the > operator increases it. See the example below.
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( )
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. Parentheses are put round sub-expressions to give them higher precedence in the search.
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~
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A leading tilde acts as a negation operator, causing the word's contribution to the row relevance to be negative. It's useful for marking noise words. A row that contains such a word will be rated lower than others, but will not be excluded altogether, as it would be with the minus operator.
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*
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An asterisk is the truncation operator. Unlike the other operators, it is appended to the word, or fragment, not prepended.
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“
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Double quotes at the beginning and end of a phrase, matches only rows that contain the complete phrase, as it was typed. |
