MySQL全文搜索结果相关性

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

但是在我下面的代码中，它返回：

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

...是的，但我的选择是什么？

你可以试试这样的

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