mysql - 获取一对多关系的最后一条记录

Question

我有两个表

users : id,name

health : id,status,test_date,user_id

包含用户健康历史的健康表

现在我想获取特定用户的最后一次健康测试和用户信息

我试过这个查询

SELECT users.*, health.* FROM users INNER JOIN health ON users.id=health.user_id
having (max(health.id)) order by users.id desc limit 50 

但是我失败了

Answer 1

试试这个:

SELECT users.*, health.* FROM users  
INNER JOIN health  
    ON health.id = (SELECT id FROM health WHERE health.id = users.id ORDER BY id DESC LIMIT 1)