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大家好,我知道这已经在许多线程中得到了回答,但我只是无法弄清楚我的查询中的错误是什么。我收到错误“操作数应包含 1 列”。看起来像我在这里构建的查询的怪物,任何帮助将不胜感激:

SELECT u.* FROM (
(SELECT fx_users.id, CONCAT_WS(' ', last_name, first_name) as matched_field, 'person' as type 
    FROM fx_users 
    LEFT JOIN fx_profiles ON fx_profiles.user_id = fx_users.id 
    WHERE (fx_profiles.first_name, fx_profiles.last_name, fx_profiles.research_area LIKE '%a%' 
    OR fx_profiles.bio LIKE '%a%' 
    OR fx_profiles.institution LIKE '%a%' 
    OR fx_profiles.faculty LIKE '%a%' 
    OR fx_profiles.faculty_position LIKE '%a%' 
    OR fx_profiles.department LIKE '%a%' 
    OR fx_profiles.website LIKE '%a%' 
    OR fx_profiles.country LIKE '%a%' 
    OR fx_profiles.city LIKE '%a%' 
    OR fx_profiles.address LIKE '%a%' 
    OR fx_profiles.zip_code LIKE '%a%' 
    OR fx_profiles.keywords LIKE '%a%' ) 
) 
UNION (SELECT fx_publications.publication_id, fx_publications.title as matched_field, 'publication' as type 
    FROM fx_publications 
    WHERE ( publications.authors LIKE '%a%' 
    OR publications.year LIKE '%a%' 
    OR publications.title LIKE '%a%' 
    OR publications.reference LIKE '%a%' ) 
) 
UNION (SELECT fx_projects.project_id, fx_projects.title as matched_field, 'project' as type 
    FROM fx_projects 
    WHERE ( projects.title LIKE '%a%' 
    OR projects.description LIKE '%a%' ) 
)
) AS u 
ORDER BY id DESC 
LIMIT 0, 20

任何帮助将不胜感激。PS:这是我的 Codeigniter 模型中代码的一部分。

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1 回答 1

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这行没有意义:

WHERE (fx_profiles.first_name, fx_profiles.last_name, fx_profiles.research_area LIKE '%a%' 

您应该将其更改为:

WHERE (fx_profiles.first_name LIKE '%a%' or
       fx_profiles.last_name  LIKE '%a%' or
       fx_profiles.research_area LIKE '%a%' 
        . . .
于 2014-07-18T02:14:55.673 回答