PHP MySQL全文搜索的相关性

Question

如何通过相关性使php全文搜索顺序？

SELECT * FROM table
WHERE MATCH (col1,col2,col3) 
AGAINST ('+$boolean' IN BOOLEAN MODE)
Order By relevance

我想设置相关性，首先应该匹配col1, col2然后再匹配col3 ，如果col1, col2完成匹配，则输入更多单词，然后上交col3 。

也许我应该设置一个百分比，例如col1, col2关联度为66％， col3关联度为34％...

Answer 1

您可以尝试如下操作：

SELECT *, (MATCH(col1, col2) AGAINST('+$boolean' IN BOOLEAN MODE) * 0.66 + MATCH(col3) AGAINST('+$boolean' IN BOOLEAN MODE) * 0.34) AS relevance
FROM table
WHERE MATCH(col1, col2, col3) AGAINST ('+$boolean' IN BOOLEAN MODE)
ORDER BY relevance DESC