如何根据相关性对全文索引搜索的结果进行排序

Question

嗨我有问题根据相关性排序我的SQL查询的结果。

这是我目前的疑问。

SELECT author FROM search WHERE MATCH(author,title,series) AGAINST('Anna Selby' in BOOLEAN MODE) 

任何人都可以告诉我如何根据相关性对结果进行排序的解决方案

Answer 1

您可以选择匹配作为查询的一部分，然后将其作为“分数”返回。 然后你可以对它进行排序。 IE：

SELECT 
  author,
  MATCH(author,title,series) AGAINST('Anna Selby' in BOOLEAN MODE) as score
FROM 
  search 
WHERE 
  MATCH(author,title,series) AGAINST('Anna Selby' in BOOLEAN MODE)
ORDER BY
  score

更新：这是一个加权的例子

SELECT 
  author,
  (
   (MATCH(author) AGAINST('Anna Selby' in BOOLEAN MODE) * 20) +
   (MATCH(title) AGAINST('Anna Selby' in BOOLEAN MODE) * 10) +
   (MATCH(series) AGAINST('Anna Selby' in BOOLEAN MODE) * 5)) as score
FROM 
  search 
WHERE 
  MATCH(author,title,series) AGAINST('Anna Selby' in BOOLEAN MODE)
ORDER BY
  score