| None |
By default (when neither + nor - is specified) the word is optional,
but the rows that contain it are rated higher. |
| + |
A leading plus sign indicates that this word must be present in every row returned. |
| - |
A leading minus sign indicates that this word must not be present in any row returned. |
| > < |
These two operators are used to change a word's contribution to the
relevance value that is assigned to a row. The > operator increases
the contribution and the < operator decreases it. See the example
below. |
| ( ) |
Parentheses are used to group words into subexpressions. Parenthesized groups can be nested. |
| ~ |
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 is rated lower
than others, but is not excluded altogether, as it would be with the -
operator. |
| " |
A phrase that is enclosed within double quote ('"') characters matches
only rows that contain the phrase literally, as it was typed. |