mysql全文查询区别

Question

我关注了this tutorial用于 mysql 全文搜索。

我有这张表:

CREATE TABLE IF NOT EXISTS `test` (
  `id` int(20) NOT NULL AUTO_INCREMENT,
  `textrow` varchar(256) NOT NULL,
  PRIMARY KEY (`id`),
  FULLTEXT KEY `textrow` (`textrow`)
) ENGINE=MyISAM  DEFAULT CHARSET=utf8 AUTO_INCREMENT=3 ;

INSERT INTO `test` (`id`, `textrow`) VALUES
(1, 'Agajan Torayev'),
(2, 'torayeff');

ALTER TABLE test ADD FULLTEXT(textrow);

这些查询之间有什么区别(一个给出零结果):

mysql> SELECT * FROM test WHERE MATCH(textrow) AGAINST('agajan');
Empty set (0.00 sec)

和

mysql> SELECT *, MATCH(textrow) AGAINST('agajan') FROM test;
+----+----------------+----------------------------------+
| id | textrow        | MATCH(textrow) AGAINST('agajan') |
+----+----------------+----------------------------------+
|  1 | Agajan Torayev |                                0 |
|  2 | torayeff       |                                0 |
+----+----------------+----------------------------------+
2 rows in set (0.00 sec)

Answer 1

不同之处在于，在第一个查询中，您使用匹配数据过滤结果，而在第二个查询中，您输出所有记录并添加一列以显示匹配ing 会导致。

虽然你没有得到结果，因为

A natural language search interprets the search string as a phrase in natural human language (a phrase in free text). [...] In addition, words that are present in 50% or more of the rows are considered common and do not match.

Taken from MySQL Full-Text Search Functions