Question

我正在尝试根据他们的标题相关性对电影进行排序。

以下是原始Myqsl查询结果。

21126   A Frozen Flower 
4557    Cashback 
4504    Frozen 
36645   Frozen
509     Frozen Assets 
20649   Frozen Flesh 
24752   Frozen Kiss 
25675   Frozen Land 
4783    Frozen River 
11798   Frozen River 
11856   Frozen Scream
21755   Frozen Silence 
26333   Frozen Thrills 
8532    Frozen Water 
16196   God Don't Make the Laws 
6158    The Frozen Ground 
28160   The Thaw 
7320    Winter of Frozen Dreams

我正在使用的当前代码

SELECT * FROM `movies` 
    WHERE `Title` LIKE '%Frozen%' 
    OR `other_title` LIKE '%Frozen%'  

    GROUP BY `Title` ORDER BY CASE 
    WHEN `Title` = 'Frozen' THEN 0
    WHEN `Title` like 'Frozen%' THEN 1
    WHEN `Title` like '% %Frozen% %' THEN 2
    WHEN `Title` like '%Frozen' THEN 3
    ELSE 4
    END, `Title`

以下是结果

4504    Frozen
509     Frozen Assets
20649   Frozen Flesh
24752   Frozen Kiss
25675   Frozen Land
4783    Frozen River
11856   Frozen Scream
21755   Frozen Silence
26333   Frozen Thrills
8532    Frozen Water
21126   A Frozen Flower
6158    The Frozen Ground
7320    Winter of Frozen Dreams
4557    Cashback
16196   God Don't Make the Laws
28160   The Thaw

好的结果看起来很不错，除了那里有重复的标题，他们没有显示。

任何想法如何解决这个问题??

Answer 1

group by正在移除副本。只需删除它：

SELECT *
FROM `movies` 
WHERE `Title` LIKE '%Frozen%' OR `other_title` LIKE '%Frozen%'  
ORDER BY (CASE WHEN `Title` = 'Frozen' THEN 0
               WHEN `Title` like 'Frozen%' THEN 1
               WHEN `Title` like '% %Frozen% %' THEN 2
               WHEN `Title` like '%Frozen' THEN 3
               ELSE 4
          END), `Title`

Answer 2

听起来你可能想在MySQL中使用自然语言搜索功能。这样您就可以将搜索条件与多个字段相匹配，并根据相关性自动对其进行排序。

有关详细信息，请参阅此链接：http://dev.mysql.com/doc/refman/5.5/en/fulltext-natural-language.html

mysql按相关性问题排序结果

2 个答案: