php - 在 mySQL 中按相关性匹配单词的一部分和顺序

Question

我正在尝试对按相关性排序的数据库进行搜索。

以下两个查询都有效，只有第一个查询没有返回结果。

我尝试使用 IN BOOLEAN MODE，但这只会使我的 title_relevance 和 desc_relevance 字段为 0 或 1，并且我想根据术语的相关程度进行正确排名，而不仅仅是它是否出现。

有什么办法可以实现这一点吗？

谢谢!

第一个查询:

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

第二个查询:

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

搜索不带通配符的“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

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