sql查询昨天记录，遍历最高N条记录

SELECT * FROM `articles`
WHERE created_at>=(current_date - interval 1 day) and 
created_at<=(current_date - interval 0 day)

2，关联表遍历分数最高的三条相关记录

表a，s

其中关联字段为a.id=s.article_id

取前三条记录sql语句为

SELECT * FROM `articles` a
JOIN (SELECT * FROM `scores` ORDER BY score DESC LIMIT 3)s
WHERE a.id = s.article_id