我构建了这个SQL请求,
SELECT
distinct c_users.id,
c_photos.user_id,
c_photos.pic_filename,
c_users.user_first_name,
c_users.user_last_name,
c_users.description,
c_users.curriculum_diploma_1,
ROW_NUMBER() OVER(ORDER BY c_users.id ASC) AS rank
FROM
c_users
INNER JOIN
c_photos
ON
c_users.id=c_photos.user_id
WHERE
lower(location_town) LIKE '%lille%'
AND
(c_photos.pic_type='profile' OR c_photos.pic_type='photo')
LIMIT
9
;
这是输出,
排名栏有一些意想不到的结果,我希望它是1,2,3等,而不是94,84,25等。我无法弄清楚如何做到这一点。
谢谢,
伦纳德
答案 0 :(得分:1)
如果您想要特定订单的结果,则需要order by
。我建议:
order by c_users.id
或
order by rank
编辑:
我不确定row_number()
如何与distinct
一起使用。我对group by
感到更舒服。但是,在您的情况下,我怀疑是否需要重复删除(除非用户有两张同名照片)。
SELECT u.id, p.user_id, p.pic_filename, u.user_first_name, u.user_last_name,
u.description, u.curriculum_diploma_1,
ROW_NUMBER() OVER (ORDER BY u.id ASC) AS rank
FROM c_users u INNER JOIN
c_photos p
ON u.id = p.user_id
WHERE lower(location_town) LIKE '%lille%' AND
p.pic_type in ('profile', 'photo')
LIMIT 9 ;
您可以添加:
GROUP BY u.id, p.user_id, p.pic_filename, u.user_first_name, u.user_last_name,
u.description, u.curriculum_diploma_1
如有必要。
答案 1 :(得分:0)
with CTE as
(
SELECT
distinct c_users.id,
c_photos.user_id,
c_photos.pic_filename,
c_users.user_first_name,
c_users.user_last_name,
c_users.description,
c_users.curriculum_diploma_1,
ROW_NUMBER() OVER(ORDER BY c_users.id ASC) AS rank
FROM
c_users
INNER JOIN
c_photos
ON
c_users.id=c_photos.user_id
WHERE
lower(location_town) LIKE '%lille%'
AND
(c_photos.pic_type='profile' OR c_photos.pic_type='photo')
)
select *
from CTE
where rank <=9
将其打包在CTE /查询中并使用row_number,或者按照新列的顺序排序(根据Gordon的回答),以使限制按预期工作。
答案 2 :(得分:0)
明确的陈述是造成这种情况的。你可以试试这个:
pause