mysql多個或不喜歡

Question

我有一個wordpress插件，實質上創建一個mysql查詢並將結果返回給wordpress。

它是用戶驅動的，因此可能會導致查詢速度非常緩慢，最終導致多個NOT LIKE的大型查詢。

，我可以用它來提高任何建議：

SELECT field1,field2,field3,field4 
from datatable 
WHERE (title NOT LIKE '%word%' AND title NOT LIKE '%word2%' 
AND title NOT LIKE '%word3%' AND title NOT LIKE '%word4%' 
AND title NOT LIKE '%word5%' AND title NOT LIKE '%word6%' 
AND title NOT LIKE '%word7%' AND title NOT LIKE '%word8%' 
AND title NOT LIKE '%word9%') 
AND MATCH (title) AGAINST ("\"brandname\" " IN BOOLEAN MODE) 
ORDER BY total ASC LIMIT 0,60 

的客戶增添了不少負面關鍵字到WordPress插件導致比上面的一個較大的疑問。

Answer 1

這是最容易做REGEXP。對於多個單詞，使用一組像(one|two|three)

SELECT 
    field1, 
    field2, 
    field3, 
    field4 
from datatable 
WHERE 
    title NOT REGEXP '(word1|word2|word3|word4|word5...|word9)' 
    AND MATCH (title) AGAINST ("\"brandname\" " IN BOOLEAN MODE) 
ORDER BY total ASC 
LIMIT 0,60 

Answer 2

您可以使用REGEXP操作一次比較所有模式。

您的查詢將是這樣的：

SELECT field1,field2,field3,field4 
    FROM data table 
WHERE title NOT REGEXP '^word[0-9]?$' 
    AND MATCH(title) ("\"brandname\" " IN BOOLEAN MODE) 
ORDER BY total ASC LIMIT 0,60