我正在一个访问者可以提供一些关键字的网站中使用搜索引擎,然后搜索引擎会对数据表执行一些查询。
我知道如何查询表,但是如何构建单个查询,该查询提供完整的结果列表以及数据表中每个匹配行的出现次数。
所以说,我有简单的表格,如:
id | title | desc
-----------------
1 | title 1 | some text with some text provding the user most likely no interesting info.
2 | title 2 | some other text
3 | title 3 | some third text saying some other crap.
我想要达到的目标是:当用户搜索“某些文字”时,我会得到如下结果:
id | title | desc | noOfMatches
-------------------------------
1 | title 1 | ... | 4
2 | title 3 | ... | 3
3 | title 2 | ... | 2
有人可以帮我这个吗?我不知道如何创建一个可以计算no的查询。查询中提供的单词的后缀......
答案 0 :(得分:1)
也许这会对你有所帮助: MySQL count matching words
答案 1 :(得分:1)
使用FULLTEXT
搜索:
CREATE TABLE t_ft (id INT NOT NULL PRIMARY KEY, words VARCHAR(255) NOT NULL) ENGINE=MyISAM DEFAULT CHARSET='utf8';
CREATE FULLTEXT INDEX fx_ft_words ON t_ft (words);
INSERT
INTO t_ft (id, words)
VALUES (1, 'some text with some text provding the user most likely no interesting info');
INSERT
INTO t_ft (id, words)
VALUES (2, 'some other text');
INSERT
INTO t_ft (id, words)
VALUES (3, 'some third text saying some other crap');
INSERT
INTO t_ft
SELECT id + 3, 'complete nonsense'
FROM t_source
LIMIT 1000;
SELECT *, MATCH(words) AGAINST('"some text"') AS relevance
FROM t_ft
WHERE MATCH(words) AGAINST('"some text"')
ORDER BY
relevance DESC;
MATCH
会返回您在ORDER BY
中可以使用的排名。