我想要的结果是:
“ID”:1, “技能”:[{“skill_name”:“产品 设计 “},{” skill_name “:” 图形 设计“}]
我的结果是:
{“id”:1,“技能”:“产品设计”},{“id”:1,“技能”:“平面设计”}
我的查询是:
select `u`.`id`, `s`.`skill_name` as `skills`
from `users` as `u`
left join `user_skills` as `s` on `u`.`id` = `s`.`user_id`
where `u`.`id` = 1
我尝试过GROUP BY user.id或SELECT DISTINCT,但没有运气。
如何为每个id获取多个结果的数组?
答案 0 :(得分:1)
SELECT u.id, group_concat(s.skill_name) AS skills
FROM users AS u
LEFT JOIN user_skills AS s ON u.id = s.user_id
WHERE u.id = 1
GROUP BY u.id
输出将是:
id skills
-- ------------------------------
1 Product Design, Graphic Design
如果您真的想要以下列格式输出:
{“id”:1,“技能”:[{“skill_name”:“产品设计”},{“skill_name”:“平面设计”}}}
然后尝试这个SQL - (疯狂版):
SELECT
'{"id":', u.id, ', skills:[',
group_concat(concat('{"skill_name":"', s.skill_name, '"}')) AS skills,
']}'
FROM users AS u
LEFT JOIN user_skills AS s ON u.id = s.user_id
WHERE u.id = 1
GROUP BY u.id
SELECT concat('{“id”:',id,',技能:['),group_concat(concat('{“skill_name”:“',skill_name,'”}'))AS技能,'] “