Question

我有以下'银行'表

ID  | name

1   | JPMorgan Chase bank  
2   | Bank of south  
3   | Citigroup bank 
4   | Wells Fargo bank
5   | Bank of New York

因此，当搜索'bank of'时，我希望搜索结果返回如下：

Bank of New York
Bank of south
Citigroup bank
JPMorgan Chase bank
Wells Fargo bank

但是我的代码下面会返回：

JPMorgan Chase bank
Bank of America
Citigroup bank
Wells Fargo bank
Bank of New York

这是代码：

$search_term = 'bank of';

$sql2 = "SELECT *, 
         MATCH(name) AGAINST ('.$search_term.' IN BOOLEAN MODE)
         AS relevance FROM banks
         HAVING relevance > 0.8 
         ORDER BY relevance DESC";

谢谢！

Answer 1

...没错，但我的选择是什么？

您可以尝试这样的事情

SELECT *, 
       MATCH(name) AGAINST ('bank of' IN BOOLEAN MODE) AS relevance,
       name LIKE '%bank of%' AS full_match
  FROM banks
HAVING relevance > 0.8 
 ORDER BY full_match DESC, relevance DESC, name

结果：

| ID |                NAME | RELEVANCE | FULL_MATCH |
|----|---------------------|-----------|------------|
|  5 |    Bank of New York |         1 |          1 |
|  2 |       Bank of south |         1 |          1 |
|  3 |      Citigroup bank |         1 |          0 |
|  1 | JPMorgan Chase bank |         1 |          0 |
|  4 |    Wells Fargo bank |         1 |          0 |

这是 SQLFiddle 演示

Answer 2

MySQL FullText 索引不会索引诸如“of”之类的两个字符的单词，因为 InnoDB 表中的最小单词长度限制为 3 个字符，MyISAM 表中的最小单词长度限制为 4 个字符。阅读更多here。在您有权将最小字长更改为 2 个字符的情况下，您应该会得到预期的结果。

MySQL全文搜索结果相关性

2 个答案: