MySQL:在多列中查找相同的字符串 [英] MySQL: Look for the same string in multiple columns

问题描述

我正在尝试提供类似搜索页面的功能.我想查询以查找"ColumnA"和"ColumnB"，"ColumnC"和"ColumnD"中的查询".并选择在任何这些列中具有单词/短语"query"的行. 看来可行:

I am trying to make a search-page-like function. I want to make a query to look for "query" in "ColumnA" and "ColumnB" and "ColumnC" and "ColumnD". And select the rows which has the word/phrase "query" in any of those columns. This appears to work:

   SELECT * FROM projects
   WHERE 
   category LIKE '%query%' OR
   name LIKE '%query%' OR 
   description LIKE '%query%'OR 
   keywords LIKE '%query%' OR 
   'type' LIKE '%query%'  
   ORDER BY name ASC   

但是很长.有没有更简单或更有效的方法?

But it is lengthy. Is there any easier or more efficient way of doing this?

推荐答案

简单的解决方法:

SELECT * 
FROM projects 
WHERE 
    CONCAT(category,name,description,keywords,type) LIKE '%query%' 
ORDER BY name ASC;

如果需要，您可以在列之间添加分隔符:

You can add separators between columns if needed:

SELECT * 
FROM projects 
WHERE 
    CONCAT(category,"|",name,"|",description,"|",keywords,"|",type) LIKE '%query%' 
ORDER BY name ASC;

您还可以使用全文本搜索(您需要按此处所述创建全文本索引:

You can also use a fulltext search (you need to create a fulltext index as described here: How do FULLTEXT INDEXES on multiple columns work?)

SELECT *, MATCH (category,name,description,keywords,type) AGAINST ('query') AS score FROM projects WHERE MATCH (category,name,description,keywords,type) AGAINST ('query');

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