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。