Php 如何列出每个活动的注册者总数和具体细节

下面显示的是他们各自的表格，我想知道我们如何获得每个活动的注册者的总人数和具体细节

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使用连接和计数。你的问题质量很差，这是瞎猜

SELECT 
    Events.*,
    COUNT(DISTINCT Registrants.regID) AS registrantCount
FROM t_events AS Events 
LEFT JOIN t_attendant AS Registrants 
    ON (Registrants.eventID = Events.eventID)
GROUP BY 
    Events.id

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你能发布你到目前为止尝试过的吗？使用选择计数不要使用图像。堆栈允许您发布代码，您知道并且

SELECT 
    Events.*,
    COUNT(DISTINCT Registrants.regID) AS registrantCount
FROM t_events AS Events 
LEFT JOIN t_attendant AS Registrants 
    ON (Registrants.eventID = Events.eventID)
GROUP BY 
    Events.id