How to use the Search
A leading plus sign indicates that this word
must be present in each row that is
A leading minus sign indicates that this word must
not be present in any of the rows that
- operator acts only to exclude
rows that are otherwise matched by other search terms. Thus,
a boolean-mode search that contains only terms preceded by
- returns an empty result. It does not
return “all rows except those containing any of the
By default (when neither
- is specified) the word is optional, but
the rows that contain it are rated higher.
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
< operator decreases it.
Parentheses 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's relevance to be negative.
This is useful for marking “noise” words. A row
containing such a word is rated lower than others, but is
not excluded altogether, as it would be with the
The asterisk serves as the truncation (or wildcard)
operator. Unlike the other operators, it should be
appended to the word to be affected.
Words match if they begin with the word preceding the
The former query remains as is and requires both
the* (a word starting with
the) to be present in the document.
The latter query is transformed to
word to be
the is both too short and a
stopword, and either condition is enough to cause it to
A phrase that is enclosed within double quote
"") characters matches
only rows that contain the phrase literally, as it
was typed. Nonword
characters need not be matched exactly: Phrase searching
requires only that matches contain exactly the same words as
the phrase and in the same order. For example,
"test phrase" matches
If the phrase contains no words that are in the index, the
result is empty. For example, if all words are either
stopwords or shorter than the minimum length of indexed
words, the result is empty.
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