mysql - 无法从第三张表中看到 mySQL COUNT

Question

我已经发布了另一条类似的消息。但没有任何帮助。所以我做了更多的阅读，并且我有这段代码在一定程度上起作用:

编辑新版本和新问题

SELECT i.*, o.organ_name, o.organ_logo, vtable.*
FROM heroku_056eb661631f253.op_ideas i
JOIN
(SELECT
    COUNT(v.agree) as agree,
    COUNT(v.disagree = 1 or null) as disagree,
    COUNT(v.obstain = 1 or null) as abstain
FROM op_idea_vote v
) AS vtable
LEFT JOIN op_organs o ON i.post_type = o.organs_id

op_idea_vote表只有1行，op_ideas表有3行。但它为每一行提供了每个 op_ideas 行中的总数

编辑工作解决方案

感谢 WayneC，这是工作代码:

SELECT i.*, o.organ_name, o.organ_logo, vtable.*
FROM heroku_056eb661631f253.op_ideas i
JOIN
   (SELECT v.idea_Id,
    COUNT(v.agree = 1 or null) as agree,
    COUNT(v.disagree = 1 or null) as disagree,
    COUNT(v.obstain = 1 or null) as abstain
   FROM op_idea_vote v
   GROUP BY v.idea_id
   ) AS vtable ON vtable.idea_id = i.idea_id
LEFT JOIN op_organs o ON i.post_type = o.organs_id
WHERE idea_geo = 'International';

Answer 1

试试这个

SELECT i.*, o.organ_name, o.organ_logo, vtable.*
FROM heroku_056eb661631f253.op_ideas i
JOIN
    (SELECT
        COUNT(v.agree) as agree,
        COUNT(v.disagree = 1 or null) as disagree,
        COUNT(v.obstain = 1 or null) as abstain
    FROM op_idea_vote v
    GROUP BY v.idea_id
    ) AS vtable ON vtable.idea_id = i.idea_id
LEFT JOIN op_organs o ON i.post_type = o.organs_id

下面的答案缺少 group by 和 vtable 的连接条件