我正在尝试使用子查询来运行此查询,但无法获取我的结果。这里的任何一个都可以帮助我确定它是正确的。
SELECT u.uv_id ID
, d.sd_code Code
, u.uv_name Title
, u.uv_nirf Nirf
, (SELECT sd_code
FROM vm_university_type t
JOIN vm_seo_detail d
ON t.ut_id = d.sd_ty_id
AND d.sd_ty = 'vm_university_type') AS 'University Type'
, a.ab_name 'Approved By'
, u.uv_seats Seats
, g.ug_name 'University Group'
FROM vm_universities u
JOIN vm_seo_detail d
ON u.uv_id = d.sd_ty_id
AND d.sd_ty = 'vm_universities'
JOIN vm_university_type t
ON u.uv_ut_id = t.ut_id
JOIN vm_approved_by a
ON u.uv_ab_id = a.ab_id
JOIN vm_caste c
ON u.uv_c_id = c.caste_id
JOIN vm_university_groups g
ON u.uv_ug_ids = g.ug_id;
我收到此错误Subquery returns more than 1 row
答案 0 :(得分:1)
根本不需要子查询。 Code
语句中的SELECT
列包含University Type
尝试以下查询。
SELECT vm_universities.uv_id AS 'ID' , vm_seo_detail.sd_code AS 'Code',
vm_universities.uv_name AS 'Title' , vm_universities.uv_nirf AS 'Nirf',
vm_approved_by.ab_name AS 'Approved By' , vm_universities.uv_seats as 'Seats',
vm_university_groups.ug_name AS 'University Group'
FROM vm_universities INNER JOIN vm_seo_detail
ON (vm_universities.uv_id = vm_seo_detail.sd_ty_id
AND vm_seo_detail.sd_ty = 'vm_universities')
INNER JOIN vm_university_type
ON (vm_universities.uv_ut_id = vm_university_type.ut_id)
INNER JOIN vm_approved_by
ON (vm_universities.uv_ab_id = vm_approved_by.ab_id)
INNER JOIN vm_caste
ON (vm_universities.uv_c_id = vm_caste.caste_id)
INNER JOIN vm_university_groups
ON (vm_universities.uv_ug_ids = vm_university_groups.ug_id);
答案 1 :(得分:1)
(SELECT `sd_code` FROM vm_university_type INNER JOIN vm_seo_detail ON (vm_university_type.ut_id = vm_seo_detail.sd_ty_id AND vm_seo_detail.sd_ty = 'vm_university_type') WHERE vm_university_type.ut_id=vm_universities.uv_ut_id ) AS 'University Type' ,
答案 2 :(得分:0)
SELECT `sd_code` FROM vm_university_type INNER JOIN vm_seo_detail ON (vm_university_type.ut_id = vm_seo_detail.sd_ty_id AND vm_seo_detail.sd_ty = 'vm_university_type')
看起来你忘了子查询中的WHERE部分,它将它绑定到主查询。
之类的东西WHERE vm_university_type.ut_id=vm_universities.uv_ut_id
PS。如果你已经在主查询中加入vm_university_type,为什么你需要这个子查询呢?