帶有多個關鍵字的PHP/MySQL複雜搜索

Question

我在使用php（或mysql）搜索功能時遇到了最困難的時間。 我願意爲此購買劇本，但我找不到任何劇本。

我有一個客戶表（名字，姓氏，街道，郵編，城市等...） 我希望能夠不只是尋找一個關鍵字，但2 INN 2不同列。

例如：

關鍵詞： 「李四」

所以我嘗試了。

SELECT .... 
    WHERE CONCAT(firstname,lastname) LIKE '%john%' 
    AND CONCAT(firstname,lastname LIKE '%doe%' 

不過：這使我回所有嫖客和不和李四先生是在該列表中的某個地方，而不是在頂部，即使它應該是最相關的結果。

我也試過：

.... 
    WHERE MATCH(firstname,lastname) AGAINST('%john doe%') 

這幾乎還給了相同的結果。

所以我在尋找的結果將是：

1. John Doe (at first position!) 
2. John Miller 
3. John Smith 
4. Harry Doe 
5. Jack Doe 
etc...... 

我一直在尋找2小時，我不相信我是誰曾經試圖做到這一點:-)第一人

任何幫助表示讚賞！

謝謝！

Answer 1

是否這樣？

SELECT 
    firstname, lastname, othercol, MIN(Weighting) 
FROM 
    (
    SELECT firstname, lastname, othercol, 1 AS Weighting FROM... 
    WHERE firstname = 'john' AND lastname = 'doe' 
    UNION ALL 
    SELECT firstname, lastname, othercol, 2 AS Weighting FROM... 
    WHERE firstname = 'john' OR lastname = 'doe' 
    ) T 
GROUP BY 
    firstname, lastname, othercol 
ORDER BY 
    MIN(Weighting) DESC; 

Answer 2

布爾模式不會自動讓你不得不行的相關性漸弱的順序進行排序：

SELECT MATCH(firstname,lastname) AGAINST('john doe') as Relevance FROM table WHERE MATCH 
MATCH(firstname,lastname) AGAINST('john doe' IN 
BOOLEAN MODE) ORDER 
BY Relevance DESC 

Answer 3

你也嘗試這樣

SELECT MATCH(firstname, lastname) AGAINST ('john doe') as Relevance 
FROM table WHERE MATCH(firstname, lastname) AGAINST('john doe' IN 
BOOLEAN MODE) 
HAVING Relevance > 0.3 
ORDER BY Relevance DESC 

也看到

http://dev.mysql.com/doc/refman/5.5/en/fulltext-boolean.html

這可能也是一個解決辦法：

SELECT MATCH(firstname) AGAINST ('john doe') as firstname_relevance, 
    MATCH(lastname) AGAINST ('john doe') as lastname_relevance 
    FROM table WHERE MATCH(firstname, lastname) AGAINST('john doe' IN 
    BOOLEAN MODE) 
    ORDER BY firstname_relevance+lastname_relevance DESC