同一表上的MySQL计数子查询

我有一个疑问：

SELECT `facilities`.`name` AS facility, `countries`.`name` AS country, `states`.`name` AS state, `users`.`dosage` AS dosage, COUNT(`users`.`id`) AS registrations 
FROM `users` 
LEFT JOIN `countries` ON `users`.`country_id` = `countries`.`id` 
LEFT JOIN `states` ON `users`.`state_id` = `states`.`id` LEFT JOIN `user_facilities` ON `users`.`id` = `user_facilities`.`user_id` 
LEFT JOIN `facilities` ON `user_facilities`.`facility_id` = `facilities`.`id` 
WHERE `users`.`dosage` != "Not sure" 
GROUP BY `facilities`.`name`, `countries`.`name`, `states`.`name`, `users`.`dosage` 
ORDER BY `facilities`.`id` ASC, `countries`.`id` ASC, `states`.`name` ASC

它给了我这个结果：

Hospital  | United States | Arkansas | 10 doses  | 3    
Hospital  | United States | Arkansas | >10 doses | 4    
Home care | United States | Arkansas | 10 doses  | 1    
Home care | United States | Texas    | 10 doses  | 1

我的用户表： id |电子邮件|州id |国家id |剂量|完成百分比|

我需要做的是为每个结果获取完成百分比=100的用户数。我尝试了子查询，但找不到适合此项的子查询。我卡住了。有人有什么建议吗？

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谢谢。

如果我理解正确，您可以使用条件聚合。在MySQL中，您只需执行以下操作：

select . . .,
       sum(percent_completed = 100) as num_at_100

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如果我理解正确，您可以使用条件聚合。在MySQL中，您只需执行以下操作：

select . . .,
       sum(percent_completed = 100) as num_at_100

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在分组后，请添加“已完成总数（完成百分比）>=100”，这将使您的用户计数已完成>=100%的用户

SELECT `facilities`.`name` AS facility, `countries`.`name` AS country, `states`.`name` AS state, `users`.`dosage` AS dosage, COUNT(`users`.`id`) AS registrations 
FROM `users` 
LEFT JOIN `countries` ON `users`.`country_id` = `countries`.`id` 
LEFT JOIN `states` ON `users`.`state_id` = `states`.`id` LEFT JOIN `user_facilities` ON `users`.`id` = `user_facilities`.`user_id` 
LEFT JOIN `facilities` ON `user_facilities`.`facility_id` = `facilities`.`id` 
WHERE `users`.`dosage` != "Not sure" 
GROUP BY `facilities`.`name`, `countries`.`name`, `states`.`name`, `users`.`dosage` having sum(users.percentage_completed) >= 100
ORDER BY `facilities`.`id` ASC, `countries`.`id` ASC, `states`.`name` ASC

---

在分组后，请添加“已完成总数（完成百分比）>=100”，这将使您的用户计数已完成>=100%的用户

SELECT `facilities`.`name` AS facility, `countries`.`name` AS country, `states`.`name` AS state, `users`.`dosage` AS dosage, COUNT(`users`.`id`) AS registrations 
FROM `users` 
LEFT JOIN `countries` ON `users`.`country_id` = `countries`.`id` 
LEFT JOIN `states` ON `users`.`state_id` = `states`.`id` LEFT JOIN `user_facilities` ON `users`.`id` = `user_facilities`.`user_id` 
LEFT JOIN `facilities` ON `user_facilities`.`facility_id` = `facilities`.`id` 
WHERE `users`.`dosage` != "Not sure" 
GROUP BY `facilities`.`name`, `countries`.`name`, `states`.`name`, `users`.`dosage` having sum(users.percentage_completed) >= 100
ORDER BY `facilities`.`id` ASC, `countries`.`id` ASC, `states`.`name` ASC

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你能给我们结构和一些样本数据作为sql语句吗？你能给我们结构和一些样本数据作为sql语句吗？非常感谢，这正是我需要的：）非常感谢，这正是我需要的：）谢谢你的回答。“Having”删除完成百分比为0的数据。条件聚合解决了我的问题：）谢谢你的回答。“Having”删除完成百分比为0的数据。条件聚合解决了我的问题：）