我有三张桌子
我想从请求表 < / enger > 中获取所有请求 < / enger > 、 请求者 < strong > 请求者 < / strong > 请求者姓名 < / enger > 中请求者身份所在的字段,并从回复表中获取对请求 < id < / strong > 答复的 < nuger > 数。
帮帮我吧
谢谢 谢谢
SELECT requests.*,requesters.requesters_name,count(1) AS c FROM requests
LEFT JOIN requesters ON requesters.requester_id = request.requester_id
LEFT JOIN responses ON responses.request_id = requests.request_id
GROUP BY requests.request_id
我从下选人那里得到点数 然后加入另外两张桌子 加上经常的组合
SELECT r.*, rn.requesters_name,
(SELECT COUNT(response_id)
FROM responses rp WHERE r.request_id=rp.request_id)
AS response_count
FROM requests r JOIN requester rn ON r.requesters_id=rn.requesters_id
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