mysql中的词相似性/相似性

问题描述

我有一个专栏，可以保存电影的类型（最多三个以斜杠分隔的说明符），例如喜剧/浪漫/冒险。在mysql或php中是否有一个函数或类似的东西可以让我采用电影的流派，并将它与其他行的其他流派进行比较并按照相似性排列它们？例如，制作一部带有喜剧/浪漫/冒险的电影将会首先将所有三部电影返回到电影中，然后再将电影与其中两种风格的电影结合在一起，最后可能会有这些风格中的一种。

解决方案

如果您启用，你可以做到。尽管如此，我建议使用外部全文搜索引擎（如sphinx）来处理这个问题，因为MySQL内置的全文索引确实不是很好。

你会开始在类型字段上设置一个全文索引

ALTER TABLE movies ADD FULLTEXT INDEX（genre）; $ b $ p
$ b

然后你就可以从中选择：

 选择*，匹配（流派）反对（'喜剧浪漫冒险'）与电影的相关性ORDER BY相关性DESC; 
  

I have a column that holds the genre of a movie (up to three specifiers separated by slashes) such as "comedy/romance/adventure." Is there a function or something similar in mysql or php that would allow me to take the genre of a movie and compare it with other genres of other rows and arrange them by likeness? For example, having a movie with "comedy/romance/adventure" would return movies with all three first, and then movies with 2 of those genres, and finally movies with maybe 1 of those genres.

解决方案

If you enable full-text indexing on the genre column, you can do it. I would recommend using an external full-text search engine such as sphinx to handle this, though, as MySQL's built-in full-text indexing really ain't that great.

You'd start by setting a full-text index on the genre field

ALTER TABLE movies ADD FULLTEXT INDEX (genre);

Then you'd be able to select from this like so:

SELECT *, MATCH(genre) AGAINST ('comedy romance adventure') AS relevancy FROM movies ORDER BY relevancy DESC;

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