Apache Solr Reference Guide Covering Apache Solr 6.0

mod_date:[20020101 TO 20030101]
Range queries are not limited to date fields or even numerical fields. You could also use range queries with
non-date fields:
title:{Aida TO Carmen}
This will find all documents whose titles are between Aida and Carmen, but not including Aida and Carmen.
The brackets around a query determine its inclusiveness.
Square brackets [ ] denote an inclusive range query that matches values including the upper and lower
bound.
Curly brackets { } denote an exclusive range query that matches values between the upper and lower
bounds, but excluding the upper and lower bounds themselves.
You can mix these types so one end of the range is inclusive and the other is exclusive. Here's an
example: count:{1 TO 10]
Boosting a Term with ^
Lucene/Solr provides the relevance level of matching documents based on the terms found. To boost a term use
the caret symbol ^ with a boost factor (a number) at the end of the term you are searching. The higher the boost
factor, the more relevant the term will be.
Boosting allows you to control the relevance of a document by boosting its term. For example, if you are
searching for
"jakarta apache" and you want the term "jakarta" to be more relevant, you can boost it by adding the ^ symbol
along with the boost factor immediately after the term. For example, you could type:
jakarta^4 apache
This will make documents with the term jakarta appear more relevant. You can also boost Phrase Terms as in
the example:
"jakarta apache"^4 "Apache Lucene"
By default, the boost factor is 1. Although the boost factor must be positive, it can be less than 1 (for example, it
could be 0.2).
Constant Score with ^=
Constant score queries are created with ^= , which sets the entire clause to the
specified score for any documents matching that clause. This is desirable when you only care about matches for
a particular clause and don't want other relevancy factors such as term frequency (the number of times the term
appears in the field) or inverse document frequency (a measure across the whole index for how rare a term is in
a field).
Example:
(description:blue OR color:blue)^=1.0 text:shoes
Specifying Fields in a Query to the Standard Query Parser
Data indexed in Solr is organized in fields, which are defined in the Solr Schema. Searches can take advantage
of fields to add precision to queries. For example, you can search for a term only in a specific field, such as a title
field.
The Schema defines one field as a default field. If you do not specify a field in a query, Solr searches only the
default field. Alternatively, you can specify a different field or a combination of fields in a query.
To specify a field, type the field name followed by a colon ":" and then the term you are searching for within the
Apache Solr Reference Guide 6.0
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