SCORE

Introduced or updated: v1.2.425

Returns the relevance of the query string. The higher the score, the more relevant the data. Please note that SCORE function can only be used with the QUERY or MATCH function.

info

Databend's SCORE function is inspired by Elasticsearch's SCORE.

Syntax

SCORE()

Examples

CREATE TABLE test(title STRING, body STRING);

CREATE INVERTED INDEX idx ON test(title, body);

INSERT INTO test VALUES
('The Importance of Reading', 'Reading is a crucial skill that opens up a world of knowledge and imagination.'),
('The Benefits of Exercise', 'Exercise is essential for maintaining a healthy lifestyle.'),
('The Power of Perseverance', 'Perseverance is the key to overcoming obstacles and achieving success.'),
('The Art of Communication', 'Effective communication is crucial in everyday life.'),
('The Impact of Technology on Society', 'Technology has revolutionized our society in countless ways.');

-- Retrieve documents where the 'title' column contains the keyword 'art' with a boost of 5 and the 'body' column contains the keyword 'reading' with a boost of 1.2, along with their relevance scores
SELECT *, score() FROM test WHERE QUERY('title:art^5 body:reading^1.2');

┌────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┐
│           title           │                                      body                                      │  score()  │
├───────────────────────────┼────────────────────────────────────────────────────────────────────────────────┼───────────┤
│ The Importance of Reading │ Reading is a crucial skill that opens up a world of knowledge and imagination. │ 1.3860708 │
│ The Art of Communication  │ Effective communication is crucial in everyday life.                           │ 7.1992116 │
└────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘

-- Retrieve documents where the 'title' column contains the keyword 'reading' with a boost of 5 and the 'body' column contains the keyword 'everyday' with a boost of 1.2, along with their relevance scores
SELECT *, score() FROM test WHERE MATCH('title^5, body^1.2', 'reading everyday');

┌────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┐
│           title           │                                      body                                      │  score()  │
├───────────────────────────┼────────────────────────────────────────────────────────────────────────────────┼───────────┤
│ The Importance of Reading │ Reading is a crucial skill that opens up a world of knowledge and imagination. │  8.585282 │
│ The Art of Communication  │ Effective communication is crucial in everyday life.                           │ 1.8575745 │
└────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘