Question

我正在尝试搜索按相关性排序的数据库。

以下两个查询都有效，只有第一个查询没有结果。

我尝试过使用IN BOOLEAN MODE，但这只是使我的title_relevance和desc_relevance字段为0或1，我想根据一个术语的相关程度进行排名，不论它是否出现。

有没有办法实现这个目标？

谢谢！

第一次查询：

SELECT 
    rcv_id,
    rcv_title,
    rcv_desc,
    (MATCH(rcv_title) AGAINST ('nur*')) AS title_relevance,
    (MATCH(rcv_desc) AGAINST ('nur*')) AS desc_relevance
FROM rc_vacancy
WHERE
    ( MATCH(rcv_title,rcv_desc) AGAINST ('nur*') )
    AND rcv_deleted = 'off'
    AND rcv_active = 'on'
    AND rcv_type = 'P'
ORDER BY title_relevance DESC, desc_relevance DESC, rcv_lastupdated

第二次查询：

SELECT
    rcv_id,
    rcv_title,
    rcv_desc,
    (MATCH(rcv_title) AGAINST ('nurse')) AS title_relevance,
    (MATCH(rcv_desc) AGAINST ('nurse')) AS desc_relevance
FROM rc_vacancy
WHERE
    ( MATCH(rcv_title,rcv_desc) AGAINST ('nurse') )
    AND rcv_deleted = 'off'
    AND rcv_active = 'on'
    AND rcv_type = 'P'
ORDER BY title_relevance DESC, desc_relevance DESC, rcv_lastupdated

在没有通配符的情况下搜索'nur'也会产生零结果：

SELECT
    rcv_id,
    rcv_title,
    rcv_desc,
    (MATCH(rcv_title) AGAINST ('nur')) AS title_relevance,
    (MATCH(rcv_desc) AGAINST ('nur')) AS desc_relevance
FROM rc_vacancy
WHERE
    ( MATCH(rcv_title,rcv_desc) AGAINST ('nur') )
    AND rcv_deleted = 'off'
    AND rcv_active = 'on'
    AND rcv_type = 'P'
ORDER BY title_relevance DESC, desc_relevance DESC, rcv_lastupdated

Answer 1

可能是AGAINST中的表达式不应包含通配符吗？您正在进行全文搜索，而不是类似LIKE的查询。

在mySQL中按照相关性匹配单词和顺序的一部分

1 个答案: