mysql - php mysql全文搜索顺序按相关性

Question

如何按相关性制作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然后匹配col3，如果匹配完成更多的单词col1, col2，然后交col3。

也许我应该设置一个百分比，比如col1, col266% 的相关性和col334% 的相关性......

Answer 1

你可以尝试这样的事情：

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